acids, bases, salts and metals - Category wise Question and Answer Practice Test with Solutions

Question : 21 [IAS (Pre) 2003]

Which one of the following statements is not correct?

a) Gypsum is added to the cement to slow down its rate of setting

b) All alkaline earth metals form hydrated salts

c) The presence of NaCl increases the rate of setting of Plaster of Paris

d) Barium and Strontium are found free in nature

Question : 22

A solution reacts with crushed egg–shells to give a gas that turns lime–water milky. The solution contains

a) HCL

b) LiCl

c) NaCl

d) KCl

Question : 23 [BPSC (Pre) 1994]

What is untrue for bleaching powder?

a) It is powder of light yellow colour

b) It is oxidant

c) It is more soluble than water

d) It releases chlorine after reaction with dilute acid

Question : 24 [BPSC (Pre) 1994]

Which acid is considered as a basic chemical in Industry?

a) $HNO_3$

b) $H_2SO_4$

c) $H_2CO_3$

d) HCl

Question : 25 [NDA]

Which of the following salts are insoluble in water ?

a) Carbonates of Pb and Cu

b) Chlorides of Fe and Mn

c) Nitrates of Ag and Pb

d) Phosphates of Na and NH₄