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CBSE Class 12 Pre Board 2020 : English Core (Kendriya Vidyalaya (KV) Agra)

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KENDRIYA VIDYALAYA SANGATHAN AGRA REGION Pre-Board Examination 2019-20 ENGLISH (CORE) (Code 301) CLASS XII Time allowed: 3 Hrs. Maximum Marks: 80 General Instructions: 1. This paper is divided into three sections: A, B and C. All the sections are compulsory. 2. Separate instructions are given with each section and question, wherever necessary. Read these instructions very carefully and follow them faithfully. 3. Do not exceed the prescribed word limit while answering the questions. SECTION-A READING: 20 MARKS 1. Read the passage given below. (12MARKS) 1. Global warming is the warming up of the earth due to the trapping of gases like carbon dioxide, carbon monoxide, methane and nitrous oxide, when the atmosphere fails to perform its function of acting as a protective blanket. The incoming solar radiation is partly absorbed by carbon dioxide, though a vastly higher amount of the outgoing radiation is trapped in the atmosphere. 2. Carbon dioxide possesses immense staying properties in the atmosphere. It is being speculated that carbon dioxide concentrations may double in about a century. This increased carbon dioxide level, according to predictions, indicates an increase in temperature ranging from 1.5-4 degrees Celsius, or a rise in sea levels by about 50 cms by AD 2100. 3. However, earth apparently has its own system of checks and balances. Water vapour in the atmosphere is known to absorb radiation more than any other atmospheric component. A doubling of carbon dioxide concentration would increase the capacity of the earth's surface to absorb infra-red radiation by about 4 watts per square meter, though overall the levels of absorption would be small. 4. Volcanic eruptions, too, are believed to be responsible for reduction in the carbon dioxide content in the atmosphere. A massive volcanic eruption in Philippines had in fact a cooling 1

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