Ans . C
Q.2 What is the major role of a greenhouse gas that contributes to temperature rise of the earth’s surface?
(A)Transparent to both incoming sunlight and outgoing infrared radiation
(B) Stops both incoming sunlight and outgoing infrared radiation
(C) Lets outgoing infrared radiation pass through but stops incoming sunlight
(D) Lets incoming sunlight pass through but stops outgoing infrared radiation
Q.3 Consider the following statements:
(1) Ozone is mostly found in the stratosphere.
(2) Ozone layer lies 55-75 km above the surface of the Earth.
(3) Ozone absorbs ultraviolet radiation from the Sun.
(4) Ozone layer has no significance for life on the Earth.
Which of the statements given above are correct?
(A)1 and 2
(B) 1 and 3
(C) 2 and 3
(D) 3 and 4
Q.4 Which among the following nontoxic gases helps in formation of enzymes which ripen fruit?
(D) Carbon dioxide
5. Which one among the following is strong smelling agent added to LPG cylinder to help in the detection of gas leakage?
Q.6 Which of the following statements regarding ozone layer within the atmosphere is/are correct?It absorbs most of the ultraviolet radiation found in the Sun's rays.Chlorofluorocarbons are serious threat to the ozone layer.
Select the correct answer using the code given below:
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2
Q.7 The major component in LPG is
Q.8 The vertical movement of air is termed as
(B) Air Current
(C) Air turbulence
(D) Air mobility
Q.9 Which of the following is not a method of preparing oxygen?
(A) Electrolysis of water
(B) Fractional distillation of liquid air
(C) Decomposition of potassium permanganate
(D) Decomposition of manganese dioxide
Q.10 Oxygen and ozone are
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