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Q1 ) Which statement is wrong regarding nitrogen?
[AFMC 1998]



SOLUTION

Nitrogen is present in atmosphere ( about 71.8%). Oxygen supports life. Nitrogen don not have such direct influence
Answer: (a)


Q2) The substance used for drying of neutral gases in laboratory is [1999]



SOLUTION

CaCl2 is hygroscopic in nature. Due to this property, it is also used for melting ice on road, particularly in very cold countries. In laboratory it is used as a drying agent
Answer: (a)


Q3) 4HNO3 +P4O10 → 4HPO3 +X In the above reaction. the product X is [1999]



SOLUTION

By balancing reaction we get 2N2O5
Answer: (d)



Q4) Ammonia and sodium hypochlorite reacts to produce [2000]



SOLUTION

HH3 + NaOCl → NH2Cl + NaOH
2NH3 + NH2Cl → NH2NH2 + NH4Cl
Answer: (b)


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