Science Chemistry MCQ-197

General Science-Chemistry Practice Test for UPPSC, JPSC, RBI, CivilsPrelims, NDA, UPSC, SSC, CDS Exams



A white powder insoluble in water dissolves in ammonium hydroxide. It could be

 
 
 
 

Which one of the following carbocations is most stable?

 
 
 
 

In some nuclear reactors, heavy water is used as a moderator. The heavy water is

 
 
 
 

Sodium thiosulphate (Hypo) is widely used in photography. Its main role in photographic process is due to

 
 
 
 

If the percentage of oxygen in a metallic oxide is 33%, then its equivalent mass is

 
 
 
 

In nature, borax occurs as

 
 
 
 

Water is in a liquid form whereas hydrogen sulphide is a gas at ordinary temperature. This is due to the presence of

 
 
 
 

The number of molecules present in 2 grams of hydrogen is

 
 
 
 

Petroleum mainly contains

 
 
 
 

Bhopal gas tragedy of 1984 was caused by one of the following compounds.

 
 
 
 

pH of blood is

 
 
 
 

Which one of the following is a polysaccharide?

 
 
 
 

When a lead storage battery is discharged

 
 
 
 

Combustion chemically is

 
 
 
 

Cinnamic acid is prepared by

 
 
 
 

The number of isomers in the aromatic compound with the formula C8H10 is

 
 
 
 

Which one of the following is used as a disinfectant in water treatement?

 
 
 
 

Benzaldehyde on treatment with chlorine in the absence of catalyst gives

 
 
 
 

Salicylic acid is prepared by

 
 
 
 

Which does not influence the ionisation energy of elements?

 
 
 
 

Which of the following metals is in liquid state at normal room temperature?

 
 
 
 

Which has the highest basic nature?

 
 
 
 

Which of the following elements behave chemically both as metal and non-metal?

 
 
 
 

The major constituent of air is

 
 
 
 

Which among the following is in liquid state at normal room temperature?