Chemical Equations Multiple Choice Questions (MCQ) PDF - 128

MCQ 636: Consider Calcium Carbonate (CaCO₃) and Hydrochloric Acid (HCl) as reactants, molecules of Hydrochloric Acid (HCl) required to balance the equation will be

1. 1
2. 2
3. 3
4. 4

MCQ 637: Symbol of gold is

1. Go
2. Gu
3. Au
4. Ag

MCQ 638: Purpose of Lean Burn engines is to

1. produce less air pollution
2. consume lesser oxygen
3. produce more efficient fuel combustion
4. use them in sky rockets

MCQ 639: What is correct about Praseodymium?

1. it is the longest name in the period table
2. it is most volatile metal
3. it is a recently discovered noble gas
4. it is an excellent conductor of electricity

MCQ 640: Fractional distillation is particularly useful if the objective is to

1. form crystals
2. examine sublimates
3. examine a immiscible solution of two liquids
4. separate a miscible solution of two liquids