Chemistry

The following salts are readily soluble in water except?

A. Na2CO3 B. Pb(NO3)2 C. KCI D. CuCO3 E. PbSO4 Correct Answer: Option E - PbSO4

5 years ago

Which of the following involves the decomposition enzymic action?

A. Esterification B. Fermentation C. Dehydration D. Polymerization E. Saponification Correct Answer: Option B - Fermentation

5 years ago

When iron rusts, it undergoes?

A. deliquescence B. chemical decomposition C. hydrolysis D. redox reaction E. combustion Correct Answer: Option D - redox reaction

5 years ago

What is the following compounds will not decompose when heated strongly?

A. NaHCO3 B. K2CO3 C. MgCO3 D. Ca(HCO3)2 E. ZnCO3 Correct Answer: Option B - K2CO3

5 years ago

”The rate a reaction is proportional to the number of effective collisions occurring per second between the reactants”. This statement is associated with the?

A. Kinetic theory B. rate law C. atomic theory D. collision theory E. gas laws Correct Answer: Option D -…

5 years ago

What is the quantity of electricity produced when a current of 0.5A is passed for 5 hours 45 mins? (1F = 96500C)

A. 0. 11F B. 0.12F C. 0.22F D. 1.1F E. 2.2F Correct Answer: Option A - 0. 11F

5 years ago

The scum formed when soap is mixed with hard water could be?

A. calcium trioxocarbonate (IV) B. propane- 1, 2, 3 - triol C. calcium hydrogentrioxocarbonate (IV) D. magnesium tetraoxosulphate (IV) E.…

5 years ago

The alloy used for metal work and plumbing contains?

A. lead and tin B. iron and carbon C. copper and tin D. aluminium and copper E. lead and antimony…

5 years ago

When ammonium chloride is dissolved in water in a test tube, the tube feels colder showing that?

A. the solution is unsaturated B. sublimation has occurred C. ammonia gas is evolved D. the process is endothermic E.…

5 years ago