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ICSE Class X Board Exam 2026 : Chemistry

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Rupavaraprasad Thamminedi
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COMPILED BY - THEJASHWINI. B XSTANDARD, BSS X CHEMISTRY CHOOSE THE CORRECT ANSWER 2024 1. Unsaturated hydrocarbons undergo: (a) Additionreaction (b) Substitution reaction (c) Oxidation reaction (d) Redox reaction 2. In the 2nd period, Neon has maximum Ionisation Potential because: (a) It has unstable electronic configuration. (b) It casily accepts electrons. (c) It casily loses electrons. (d) The outer most shell is completely filled. 3. Copper, Zinc, and Tin are the metals alloyed to form: (a) Duralumin (b) Brass (c) Bronze (d) Solder 4. The metal hydroxide which reacts with both acids and alkalis to form salt and water is: (a) Calcium hydroxide (b) Magnesium hydroxide (c) Aluminium hydroxide (d) Ferric hydroxide 5. Reaction of an alcohol with a carboxylic acid in the presence of concentrated H,SO, is termed as: (a) Halogenation (b) Esterification (c) Hydrogenation (d) Dehydrohalogenation 6. Conversion of Ethanol to Ethene by the action of concentrated sulphuric acid involves:(a) Dehydration (b) Dehydrogenation (c) Dehydrohalogenation (a) Hydrolysis 7. The oxidising agent in the equation, S+2H,SO, 3SO +2H;0 is: (a) Sulphur (b) Sulphuric acid (c) Sulphur dioxide (d) Water 8. Electron Affinity is maximum in: (a) Mg (b) Ar (c) Li (d) Br 9. The compound that is not a constituent of the electrolytic mixture used in the Hall Heroult's process is: (a) Al,03 (b) NaAlO2 (c) Na_AlF6 (d) CaFz 10. On passing ammonia gas over heated copper oxide for some time, a reddish-brown residue is left behind. What property of ammonia is demonstrated here? (a) Basic property (b) Oxidising property (c) Reducing property (d) Acidic property 11. Rotten egg smell is due to the liberation of: (a) HClgas (b)HS gas (c) Clh gas (d) SO2 gas 12. Ammonia gas is collected by downward displacement of air since ammonia is: (a) very slightly soluble in water. (b) heavier than air. (c) lighter than air. (d) insoluble in water. 13. Which of the following would occupy 22.4 litres at S.T.P.? 1.32 g of oxygen gas 2. 2 moles of hydrogen gas 3.6.022 x1023 molecules of ammonia (a) 1and 2 (b) 1 and 3 (c)2 and 3 (d) 1,2 and 3 [Atomic weights: O = 16,H = 1, N= 14] 14.Inthe molecule of water, oxygen atom has: (a) One shared pair of electrons (b) Three shared pair of electrons. (c) Two lone pairs of electrons. (d) One lone pair of electrons. Page 1 COMPILED BY -THEJASHWINI. B XSTANDARD, BSS 15. A mineral from which the metal can be extracted economically and conveniently is known as: (a) Matrix (b)Ore (c) Flux (d) Alloy 2023 16. An element in period 3, whose electron affinity is zero: (a) Neon (b) Sulphur (c) Sodium (d)Argon 17. Aelement with the largest atomic radius among the following is: (a) Carbon (b)Nitrogen (c) Lithium (d) Beryllium 18.The compound that is not an ore of aluminium (a) Cryolite (b) Corundum (c) Fluorspar (d) Bauxite (At.wt C=12, H=1, O=16) 19.The vapour density of CH,OH is (a) 32 (b)18 (c) 16 (d) 34 20. Which of the reactions takes place at the anode during the electroplating of an article with silver? (a) Ag-le Ag+ (b)Ag + le Ag (c) Ag- le Ag (b) None of the above 21.The metallic hydroxide which forms deep inky blue solution with excess ammonium hydroxide solution is: (a) Fe(OH)) (b) Cu(OH)2 (c) Ca(OH2 (d) Fe(OH); 22.An example of cyclic organic compound is: (a) Propene (b)Pentene (c)Butene (d) Benzene 23.In the laboratory preparation, HClgas is dried by passing through: (a)dilute nitric acid (b) concentrated sulphuric acid (c) dilute sulphuric acid (d) acidified water 24.The nitrate which on thermal decomposition leaves behind a residue which is yellow when hot and white when cold: (a) Lead nitrate (b) Ammonium nitrate (c) Copper nitrate (d) Zinc nitrate 25.The salt formed when concentrated sulphuric acid reacts with KNO; above 200 C (a) K2SO4 (b) KSO3 (c) KHSO4 (d) KHSO3 26.The Property exhibited by concentrated sulphuric acid when it is used to prepare hydrogen chloride gas fromn potassium chloride (a) Dehydrating property (b) Drying property (c) Oxidizing Property (d) Non-volatile acid property 27. The hy drocarbon formed when sodium propanoate and sodalime are heated together: (a) Methane (b)Ethane (c) Ethene (d) Propane 28.The acid which does not form acid salt by a basic radical: (a) H,CO3 (b) H,PO4 (c) H2S04 (d) CH;COOH 29.The general formula of hydrocarbons with single covalent bonds is: (a) C,H2nt2 (b) C,H2n (C) CHH2n-2 (d) CHn-6 30. The indicator which changes to pink colour in an alkaline solution is: (a) Blue litmus (b) Methyl orange (c) Red Litmus 2022 31.The ore of Aluminium is: (d) Phenolphthalein Page 2 COMPILED BY -THEJASHWINI. B XSTANDARD, BSS (a) Calamine (b) Haematite (c) Magnetite (d) Cryolite 32.Hydrogen chloride gas is not collected over water, as: (b)It is less soluble in water. (a) It is highly soluble in water. (d) It is heavier than air. (c) It is lighter than air. 33.An aqueous solution of ammonia is: (a) Neutral (b) Acidic (c) Basic (d) Amphoteric 34.The acid which is least volatile is: (b) Nitric acid (a) Hydrochloric acid sulphuric acid (c) Dilute sulphuric acid (d) Concentrated with dilute HNO3: 35.The gas formed, when calcium bisulphite reacts dioxide (a) Sulphur trioxide (b) Hydrogen (c)Sulphur (d) Hydrogen sulphide 36.The IUPAC name of formic acid: (a) Propanoic acid (b) Methanoic acid (c)Ethanoic acid 37.The metallic oxide which when reacts with (a) Carbon monoxide (d) Sodium oxide (b)Nitrous oxide (d)Butanoic acid HCI forms salt and water: (c) Ammonium hydroxide of: 38.Vanadium pentoxide is used as a catalyst in the preparation (c)Sulphur trioxide gas (a) Nitrogen gas (b) Nitrogen dioxide gas (d) Carbon dioxide gas Ethene to Ethane: 39.The Catalyst used for the conversion of (a) Iron (b) Nickel (c) Cobalt (d) Molybdenum mixture in Hall Heroult 40.Substance which helps to lower the fusion point of the process: (a) Coke (b) Concentrated sodium hydroxide (c)Cryolite (d) Concentrated potassium hydroxide arranged in the increasing order 41. In the Periodic Table, elements of Period 3are of ionization potential as: (a) B, N, CI, Ar (b)Mg, Si, S,Ar (c) Ar, Si, S, Mg (d) Si, Ar, C1, Mg its vapour density 42. If relative Molecular Mass of Butane (C4H0) is 58 then will be: (d) 16 (a) 58 (b) 29 (c) 32 electrolysis of molten lead bromide: (a) 43. Identify one statement that holds true for Silver grey metal deposits at the anode the electrolysis during (b) Temperature is not maintainedare obtained at the anode bromine (c) Brown vapours of along with Pb2* ions (d) Electrolyte contains H* ions shared pair of electrons to itself when 44. The tendency of an atom to attract as: forming a chemicalbond is known (a) Electron affinity (d) Nuclear charge (b) Electronegativity (c) Ionization potential not conduct electricity as: does chloride sodium Solid 45. (b) It contains free ions the bond is weak of strength The (a) Page 3 X STANDARD, BSS COMPILED BY - THEJASHWINI. B (c) It does not contain any free ions (d) It contains free ions as well as molecules The chemical 46. Elements A and B have atomic numbers 8 and 13 respectively. formula formed between A and B will be: (a) AB (b) B3A3 (c) AB3 (d) BzA3 (Relative Molecular Mass of 47. The percentage of hydrogen present in NaOH is: NaOH = 40) (At. Wt. of H=1) (d) 0.025 (a) 2.5 (b) 25 (c) 0.25 48. A salt formed by incomplete neutralization of an acid by a base: (d) Complex salt (a) Basic salt (b) Acid salt (c) Normal salt amount of 49. The colour of the precipitate formed after the addition of a small sodium hydroxide solution to an aqueous solution of ferric chloride is: (d) dirty green (b)pale blue (c) reddish brown (a) gelatinous white 50. Alkaline earth metals have the same: (b) number of shells (a) number of valence electrons (c) metallic property (d) ionization potential water? 51. Which of thefollowing compounds neither dissociate nor ionise inNitrate Potassium (a) Hydrochloricacid (b)Sodium hydroxide (c) (d) Carbon tetrachloride 52. Elenment with an atomic number 19 wil: (a) accept an electron and get oxidized (c) lose an electron and get oxidized (b) accept an electron and get reduced (d) lose an electron and get reduced 53. Which of the following has twO sets of lone pair of electrons in them? (d) Ammonium ion (a) Ammonia (b) Methane (c) Water Molecular Mass 54. If the empirical mass of the formula PQ, is 10and the Relative is 30, then the molecular formula will be: (a) PQ2 (b) P;Q2 (c) PQ3 (d) P:Q6 55. Which of the following is a tribasic acid? (a) H,SO4 (b) Al(OH)3 (c) H3PO4 (d) Ca(OH) 56. If a solution of an electrolyte mixture has calcium ions, cupric ions, zine ions and magnesium ions, which of these ions would you see preferentially discharged at the cathode? (a)Calcium ions (b) Zinc ions (c) Cupric ions (d) Magnesium ions 57. Which of the following ions will readily discharge at the anode during the electrolysis of acidulated water? (b) SO2- (c) Ci (d) H* 58. If the empirical formula of a compound is CH and its vapour density is 13, then (a) OH its molecular formula will be: (At. Wt. C=12, H=l) (d) C;H3 (b) CzH2 (c) CaH4 (a) CH a deep blue solution on addition of 59. Aqueous solution of Cupric chloride(b)forms excess sodium hydroxide sodium hydroxide (a) dropwise (c)dropwise ammonium hydroxide (d) excess ammonium hydroxide Page 4 X STANDARD, BSS COMPILED BY - THEJASHWINI. B 60. Which statement about conduction of electricity is correct? (a) Electricity is conducted in aqueous solution by electrons (b) Electricity is conducted ina metal wire by ions (c) Electricity is conducted ina molten electrolyte by electrons (d) Electricity is conducted in an acid solution by ions 61. If an element has low ionization potential, then it is likely to be a: (a) metal (b) metaloid (c) non metal (d) inert gas 62. The products formed vwhen an acid reacts with a base is: (a) salt and hydrogen (b) salt and oxygen (c)salt and water (d) salt and carbon dioxide 63. Which one of the following is a non metallic cation? (a) K+ (b) NH4 (c) Cu?* (d) Nat 64. Type of bonding present in hydrogen chloride: (a) metallic (b) ionic (c) covalent (d) coordinate 65. The non-metallic properties of elements from left to right in a Periodic Table: (b)decreases (c) remains same (d) first increases and then decreases (a) increases 66. The aqueous solution that contains both ions and molecules: (a) sulphuric acid (b) nitric acid (c) acetic acid (d) hydrochloric acid 67. The basic oxide which is an alkali: (a) Copper oxide (b) Sodium oxide (c) Ferric oxide 68. If the pH of a solution is 2:, then the solution is a: (a) strong acid (b) strong alkali (c) weak acid (d) Zinc oxide (d) weak alkali 69. The acidity of aluminium hydroxide is: (a) 3 (b) 1 (c) 4 (d) 2 70. Hydracids are those acids which contain: (a) Hydrogen with any metal (b) Hydrogen, a non-metal and oxygen (c) Hydrogen and a non-metal other than oxygen (d) Hydrogen and oxygen only 71. The oxidation reaction among the following is: (b) Fe+- le Fet (a) Fe+ 3e Fe (c) C1, + 2e 2C1 (d) Cu*+ 2e+Cu 72. A student added excess of sodium hydroxide solution to each of the salt solutions listed below. An insoluble precipitate formed was observed in: (a)Caleium nitrate (b)Zinc nitrate (c) Lead nitrate (d) Sodium nitrate 2021 73. The metal which reacts with concentrated NaOH to produce Hydrogen gas is: (a) Iron (b) Aluminium (c) Copper (d) Gold 74. Electron affinity is highest for the element in: (a) Group 1 (b) Group 2 (c) Group 17 (d) Group 18 75.The electrodes, at which the elements copper and hydrogen are formed respectively during electroly sis are: Page 5 X STANDARD, BSS COMPILED BY - THEJASHWINI, B (a) Copper - at Anode, (b)Copper - at Anode, (c) Copper - at Cathode, Hydrogen - at Anode Hydrogen - at Cathode Hydrogen - at Anode (d)Copper - at Cathode, Hydrogen - at Cathode 76. In Hall Heroult's process, this compound is taken in a higher ratio and it also lowers the fusion temperature of the electrolyte: (a) Cryolite (b)Fluorspar (c) Alumina (d) Powdered coke 77.The molecular formula of propene is: (a)C3H (b)C;H6 () C,Hy (d) C,H|o 2020 78.The element with highest ionization potential, is: (a) Hydrogen (b) Caesium (c) Radon (d) Helium 79.The inert electrode used in the electrolysis of acidified water, is: (a) Nickel (b) Platinum (c) Copper (d) Silver 80.A compound with low boiling point, is: (a) Sodium chloride (b)Calcium chloride (d) Carbon tetrachloride (c)Potassium chloride 81.The acid which can produce carbon from cane sugar, is: (a) Concentrated Hydrochloric acid (b) Concentrated Nitric acid (c) Concentrated Sulphuric acid (d) Concentrated Acetic acid 82.The organic compound having a triple carbon-carbon covalent bond, is: (a) C3H4 2019 (b) C;H6 (c) CsHg (d) CAHo 83.An electrolyte which completely dissociates into ions is : (a) Alcohol (b) Carbonic acid (c) Sucrose (d) Sodium hydroxide 84.The most electronegative element from the following elements is : (a) Magnesium (b) Chlorine (c) Aluminium (d) Sulphur 85.The reason for using Aluminium in the alloy duralumin is: (a) Aluminium is brittle (b) Aluminium gives strength (c) Aluminium brings lightness (d) Aluminium lowers melting point 86.The drying agent used to dry HCl gas is : (a) Cone. H;SO4 (b)ZnO (c) Al,0; (d) CaO 87. A hydrocarbon which is a greenhouse gas is : (a) Acetylene (b) Ethylene (c) Ethane (d) Methane 2018 88.The salt solution which does not react with ammonium hydroxide is : (a) Calcium Nitrate (b) Zinc Nitrate (c) Lead Nitrate (d) Copper Nitrate 89. The organic compound which undergoes substitution reaction is : (a) CzlH, (b) CzH4 (c) C1oH1s (d) CzH6 90.The electrolysis of acidified water is an example of: (a) Reduction (b) Oxidation (c)Redox reaction (d) Synthesis is : Process 91.The catalyst used in the Contact (a) Copper (b)Iron (c) Vanadium pentoxide (d) Manganese dioxide Page 6 COMPILED BY - THEJASHVWINI, B X STANDARD, BSS 2017 92.A chloride which forms a precipitate that is soluble in excess of ammonium hydroxide, is: (a) Calcium chloride (b) Ferrous chloride (c) Ferric chloride (e) Copper chloride 93. If themolecular formula of an organic compound is C10H18 itis: (a) alkene (b) alkane (c) alkyne (d) Not a hydrocarbon 94. Which of the following is a common characteristic of a covalent compound? (a) high melting point (b) consists of molecules (c) always soluble in water (d) conducts electricity when it is in the molten state 95. To increase the pH value of a neutral solution, we should add: (a) an acid (b)an acid salt (c) an alkali (d) a salt 96. Anhy drous iron(III) chloride is prepared by: (a) direct combination (b) simple displacement (c) decomposition (d) neutralization 2016 97.An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is: (a) 17 (b) 11 (c) 18 (d) 20 98. The ratio between the number of molecules in 2g of hydrogen and 32g of oxygen is: (a) 1:2 (b) 1:0.01 (c) 1:1 (d) 0.01 : 1[Given that H= 1,O= 16] 99.The two main metals in Bronze are: (b) Copper and lead (a) Copper and zinc (d) Copper and tin (c) Copper and nickel 100. The particles present in strong electrolytes are: (a) Only molecules (b) Mainly ions (c)Lons and molecules (d) Only atoms 101. The aim of the Fountain Experiment is to prove that: (b) HCIis denser than air (a) HCl turns blue litmus red (c) HCIis highly soluble in water (d) HCI fumes in moist air. 2015 102. Among the elements given below, the element with the least electronegativity is: (a) Lithium (b) Carbon (c) Boron (d) Fluorine 103. Identify the statement which does not describe the property of alkenes: (a) They are unsaturated hy drocarbons (b) They decolourise bromine water (c) They can undergo addition as well as substitution reactions (d) They undergo combustion with oxygen forming carbon dioxide and water 104. This is not an alloy of copper: (a) Brass (b)Bronze (c) Solder (d) Duralumin Page 7 X STANDARD, BSS COMPILED BY -THEJASHWINI. B 105. Bonding in this molecule can be understood to involve coordinate bonding. (a) Carbon tetrachloride (b) Hydrogen (d) Ammonium chloride (c) Hydrogen chloride 106. Which of the following would weigh the least? (a) 2gram atoms of Nitrogen. (b) 1mole of Silver (c) 22.4 litres of oxygen gas at 1 atmospheric pressure and 273 K. (d) 6.02x 10 atoms of carbon. [Atomic masses: Ag =108, N=14, 0= 16, C = 12] 2014 107. Ionisation Potential increases over aperiod from left to right because the: (a) Atomic radius increases and nuclear charge increases (b)Atomic radius decreases and nuclear charge decreases (c) Atomic radius increases and nuclear charge decreases (d) Atomic radius decreases and nuclear charge increases. 108. Acompound Xconsists of only molecules. Hence Xwill have: (a) A crystalline hard structure (b) A low melting point and low boiling point (c) An ionic bond () Astrong force of attraction between itsmolecules. 109. When fused lead bromide is electrolysed we observe: (a) a silver grey deposit at anode and a reddish brown deposit at cathode (b) a silver grey deposit at cathode and a reddish brown deposit at anode (c) a silver grey deposit at cathode and reddish brown fumes at anode (d) silver grey fumes at anode and reddish brown fumes at cathode. 110. The main ore used for the extraction of iron is: (a) Haematite (b) Calamine (c) Bauxite (d) Cryolite 111. Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as: (a) smelting (b) ore dressing (c) calcination (d) bessemerisation 112. Ifan element Abelongs to Period 3 and Group II then it will have: (a)3 shells and 2 valence electrons (c) 3 shells and 3 valence electrons (b) 2 shells and 3 valence electrons (d) 2 shells and 2 valence electrons 113. The molecule containing a triple covalent bond is: (a) ammonia (b)methane (b) water (d) nitrogen 114. The electrolyte used for electroplating an article with silver is: (b)silver cyanide solution (a) silver nitrate solution (C) sodium argentocyanide solution (d) nickel sulphate solution H5. Auminium pewder is-Hsed in thermite welding beeatse: fb)it is asreng exidising-ageHt fa)it is a-strong redueing agent fdit is-a geed eendueter efheat fe)it is eerresien esistant is: acetylene of name 116. The I.U.PA.C. (a) propane (b) propyne (b) ethane (d) ethyne Page 8 COMPILED BY - THEJASHWINI. B XSTANDARD, BSS 2013 117. Among the period 2 elements, the element which has high electron affinity is: (a) Lithium (b) Carbon (c) Chlorine (d) Fluorine 118. Among the following compounds identify the compound that has all three bonds (ionic, covalent and coordinate bond) (b)Ammonium chloride (a) Ammonia (c) Sodium hydroxide (d) Calcium chloride 119. Identify the statement that is incorrect about alkanes: (a) They are hydrocarbons. (b) There is a single covalent bond between carbon and hydrogen. (c) They can undergo both substitution as well as addition reactions. (d) On complete combustion they produce carbon dioxide and water. 120. Which of these willact as a non-electrolyte? (a) Liquid carbon tetrachloride (b) Acetic acid (c) Sodium hydroxide aqueous solution acid (d) Potassium chloride aqueous solution 121. Which one of the following willnot produce an acid when made to react with water? (a) Carbon monoxide (b) Carbon dioxide (c) Nitrogen dioxide (d) Sulphur trioxide 122. Identify the metallic oxide which is amphoteric in nature: (b)Barium oxide (a) Calcium Oxide (d) Copper(l) oxide (c) Zinc oxide 123. In the given equation identify the role played by concentrated sulphuric acid S+ 2H,SO4 3S0, + 2H,0: (a) Non-volatile acid (b)Oxidising agent (c) Dehydrating agent (d) None of the above (a) Ammonium nitrate (b) Ammonium nitrite (d) Ammonium chloride 124. Nitrogen gas can be obtained by heating: (c) Magnesium nitride 125. Which of the following is not atypical property of an ionic compound? (a) High melting point. (b) Conducts electricity in the molten and in the aqueous solution state. (c) They are insoluble in water. (d) They exist as oppositely charged ions even, in the solid state. 126. The metals zinc and tin are present in the alloy: (b)Brass (c) Bronze (d) Duralumin (a) Solder 2012 127. An element inperiod-3 whose electron affinity is zero. (a) Neon (b) Sulphur (c) Sodium (d) Argon 128. An alkaline earth metal. (a) Potassium (b)Calcium (c) Lead (d) Copper Page 9 XSTANDARD, BSS COMPILED BY - THEJASHVWINI, B 129. The vapour density of carbon dioxide (C= 12, O= l6]. (a) 32 (b) 16 (c) 44 (d) 22 130. Identify the weak electrolyte from the following: (a) Sodium Chloride solution (c) Dilute Sulphuric acid (b) Dilute Hydrochloric acid (d) Aqueous acetic acid 131. Which of the following metallic oxides cannot be reduccd by normal reducing agents? (a) Magnesium oxide (c) Zinc oxide (b) Copper(ll) oxide (d) Iron(ll) oxide 2011 132. This metal is a liquid at room temperature. (a) Potassium (b) Zinc (c) Gold (d) Mercury 133. Hydroxide of this metal is soluble in sodium hydroxide solution: (a) Magnesium (b)Lead (c) Silver (d) Copper 134. In the periodic table alkali metals are placed in the group (a) 1 (b) 11 (c) 17 (d) 18 135. Hydrogen chloride gas being highly soluble in water is dried by: (a) Anhydrous calcium chloride (b)Phosphorous penta oxide (c) Quick lime (d) Concentrated sulphuric acid 136. The brown ring test is used for detection of: (a) CO;2(b) NO3 (c) SO,(d) Ct 137. When dilute sulphuric acid reacts with iron sulphide, the gas evolved is (a) Hydrogen sulphide (b) Sulphur dioxide (c) Sulphur trioxide (d) Vapour of sulphuric acid 138. The functional group present in acetic acid is: (a) Ketonic C=O (b) HydroxylOH (d) CarboxylCOOH (c) Aldehydic CHO 139. The unsaturated hydrocarbons undergo: (b) an oxidation reaction (a) a substitution reaction (d) none of the above 140. The number of C-H bonds in ethane molecule are: (c) Eight (d) Ten (a) Four (b) Six 141. Which of thefollowing properties do not match with elements of the halogen (c) an addition reaction family? (a)They have seven electrons in their valence shell. (b) They are highly reactive chemically. (c)They are metallic in nature. (d) They are diatomic in their molecular form. 2010 142. A Dparticular solution contains molecules and ions of the solute so it is a: (a) weak acid (b) strong acid (c) strong base (d) salt solution 143. Acompound which liberates reddish brown gas around the anode during electrolysis in its molten state is: Page 10 COMPILED BY - THEJASHWINI. B XSTANDARD, BSS (b) Copper(ll) oxide (a) Sodium chloride (c) Copper(ll) sulphate (d) Lead(Il) bromide 144. An organic compound undergoes addition rcactions and gives a red colour precipitate with ammoniacal cuprous chloride. Therefore, the organic compound could be: (d) Ethanol (a) Ethane (b) Ethene (c) Ethyne 145. An organic weak acid is: (a) Formic acid (c) Nitric acid (b) Sulphuric acid (d) Hydrochloric acid 146. During ionization metals lose electrons, thischange can be called: (d) Displacement 147. Which one of the following is not true of metals: (a) Oxidation (b) Reduction (c) Redox (a) Metals are good conductors of electricity (b) Metals are malleable and ductile (c) Metals from non-polar covalent compounds (d) Metal will have l or 2 or 3 electrons in their valence shell. 148. Anexample ofaeomplexsalt is: fa) Zine sulphate tb) Sedim-hydrogensutphate im-sutphte fd) Tetrammine eopperfH)sulphate feIron 149. Aqua regia is a mixture ef: fe) Dilute hydreehBeie aeid and eoneentrated nitrie- acid b)Ceneeatrated hydreehlerie aeid and-diBute nitrie aeid fe)Coneentrated hydreehlerie aeid fl part} aad eeneentrated-nitrie aeid fB parts} fe) Concentrated hydreehlerie aecid f3-parts}and-ceneentrated nitrie aeid ft partt 150. The organic compound mixed with ethanol to make it spurious is: (a) Methanol (b) Methanoic acid (c) Methanal (d) Ethanoic acid 151. The number of electrons present in the valence shell of ahalogen is: (a) 1 (b) 3 (c) 5 (d) 7 2009 152. Among the period 2 elements the one which has high electron affinity is: (a) Lithium (b) Carbon (c) Fluorine (d) Neon 153. Among the following the one which is composed, of all the three kinds of bond (ionic, covalent and coordinate bond) is: (b) Ammonia (a) Sodium chloride (c) Carbon tetrachloride (d) Ammonium chloride 154. Which of the following statements is wrong about alkanes? (a) They are all saturated hydrocarbon. (b) They can undergo addition as well as substitution reaction. (c) They are almost non polar in nature. (d) On complete combustion give out carbon dioxide and water. 155. Select the acid which contains four hydrogen atoms in it. (d) Acetic acid (b) Sulphuric acid (c) Nitric acid (a) Formic acid Page 11 COMPILED BY-THEJASHWINI. B X STANDARD, BSS 156. A gas cylinder of capacity of 20 dm is filled with gas X the mass of which is 10 g. When the same cylinder is filled with hydrogen gas at the same temperature and the pressure the mass of the hy drogen is 2 g. hence the relative molecular mass of gas is: (a) 5 (b) 10 (c) 15 (d) 20 contains both ions and 157. The aqueous solution of the following compounds which molecules is: (a) Sulphuric acid (b) Hydrochloric acid (d) Acetic acid (c) Nitric acid 158. The metal oxide which can react with acid as well as alkali is: (b) Copper (II)oxide (a) Silver Oxide (d) Calcium oxide (c) Aluminium oxide 159. Carbon dioxide and sulphur dioxide gas can be distinguished by using: (a) Moist blue litmus paper (b) Lime water (c) Acidified potassium dichromate paper (d) None of the above. fermentation of sugar 160. The organic compound obtained as the end product of the solution is: (b) Ethanol (a) Methanol (d) Methanoic acid (c) Ethane forms a blue 161. A black colour solid which on reaction with dilute sulphuric acid coloured solution is: (a) Carbon (c) Lead (I) oxide (b) Manganese (V) oxide (d) Copper (II) oxide 2008 the 162. With reference to the variation of properties in the Periodic Table, which of following is generally true? (a)Atomic size increases from left toright across a period. (b) Ionization potential increases from left to right across a period. (c) Electron affinity increases going down a group. (d) Electro-negativity increases going down a group. electrovalent 163. Which of the following is not a common characteristic of an compound? (a) High melting point. (b) Conducts electricity when molten. (c) Consists of oppositely charged ions. (d)Ionizes when dissolved in water. to a solution 164. Dilute sulphuric acid will producea white precipitate when added of: nitrate (a) Copper nitrate (b) Zinc nitrate (c) Lead nitrate (d) Sodium hvdroxide sodium with precipitate 165. The salt which in solution gives a pale green chloride solution is: solution and a white precipitate with barium Page 12 COMPILED BY - THEJASHWINI. B X STANDARD, BSS (b) Iron (II) sulphate (d) Iron (II1) chloride number of molecules of the 166. The gas law which relates the volume of a gas to the (a) Iron (IIl) sulphate (b) Iron (I1)chloride gas is: (a) Avogadro's Law (c) Boyle's Law (b) Gay-Lussac's Law (d) Charles'Law of the following takes 167. During the clectrolysis of molten lead bromide, which place? (a) Bromine is relcased at the cathode (b) Lead is deposited at the anode (c) Bromine ions gain electrons (d) Lead is deposited at the cathode 168. Brass is an alloy of: (b) Copper and zinc (d) Lead and tin (c) Zinc and lead 169. Ammonia can be obtained, by adding water to: (a)Ammonium chloride (b) Ammonium nitrate (d) Magnesium nitrate (c) Magnesium nitride from ethene and bromine is an example of: 2-dibromethane 170. The formation of 1, (b) Dehydration (a) Substitution (d) Addition (c) Dehydrohalogenation (a)Copper and tin Page 13

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