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

Question : 21 [UPPCS (Pre) 2010]

The useful element in photography is

a) Silver Bromide

b) Sulphuric Acid

c) Silver Nitrate

d) Citric Acid

Question : 22

pH of human body varies within the range of

a) 5.5 to 5.8

b) 7.0 to 7.8

c) 6.0 to 6.5

d) 7.0 to 11.0

Question : 23 [RAS/RTS (Pre) 2016]

The chemical formula of baking soda is

a) $NaHCO_3$

b) $CaCO_3$

c) $Ca(OH)_2$

d) $Na_2CO_3$

Question : 24

Which method is employed for obtaining a pure metal?

a) Magnetic separation

b) Froth floatation

c) Electrolytic refining

d) Gravity separation

Question : 25

Which of the following is considered a mineral acid ?

a) Lactic acid

b) Citric acid

c) Oxalic acid

d) Phosphoric acid