Which one of the following group of gases contributes to the 'Green House Effect'?
A. Carbon dioxide and Methane
B. Ammonia and Ozone
C. Carbon monoxide and Sulphur dioxide
D. Carbon tetraflouride and Nitrous oxide
Answer: Option A
A. Carbon dioxide and Methane
B. Ammonia and Ozone
C. Carbon monoxide and Sulphur dioxide
D. Carbon tetraflouride and Nitrous oxide
Answer: Option A
Which of the following phenomenon is considered responsible for Global Warming?
A. Greenhouse effect
B. Fire in coal mines
C. Dry farming
D. Monsoon
E. Trade winds
The nucleus of an atom consists of
A. electrons and neutrons
B. electrons and protons
C. protons and neutrons
D. All of the above
The number of moles of solute present in 1 kg of a solvent is called its
A. molality
B. molarity
C. normality
D. formality
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