Chemistry Mcqs

The sequence of zones in the rotary kiln are as____________________?

• (A)  dry zone burning zone decomposition zone cooling zone
• (B)  cooling zone burning zone decomposition zone dry zone
• (C)  burning zone cooling zone decomposition zone
• (D)  dry zone decomposition zone burning zone cooling zone

Answer

Submitted By :Ali Uppal

Which one of the following raw material is not present in the cement ?

• (A)  lime stone
• (B)  gypsum
• (C)  KNO3
• (D)  iron oxide

Answer

Submitted By :Ali Uppal

Phosphorus helps in the growth of_________________?

• (A)  root
• (B)  leave
• (C)  stem
• (D)  seed

Answer

Submitted By :Ali Uppal

Energy of activation for backward reaction is less than forward reaction for ___________ reactio?

• (A)  Endothermic
• (B)  Exothermic
• (C)  Moderate
• (D)  Fast

Answer

Submitted By :Ali Uppal

When the reaction completes in more than one steps rate of reaction will be determined by________________?

• (A)  Fast step
• (B)  Slowest step
• (C)  All steps
• (D)  Molecularity of the reaction

Answer

Submitted By :Ali Uppal

A substance which increases the reactivity of enzyme is called_________________?

• (A)  Promoters
• (B)  Inhibitors
• (C)  Stimulators
• (D)  Non-activators

Answer

Submitted By :Ali Uppal

An enzyme has its specificity due to________________?

• (A)  Substrate
• (B)  Structure
• (C)  Temperature
• (D)  Pressure

Answer

Submitted By :Ali Uppal

Biocatalytical proteins are_________________?

• (A)  Enzymes
• (B)  Substrate
• (C)  Lipids
• (D)  any of above

Answer

Submitted By :Ali Uppal

When catalysts and reactants are in more than one phase it is________________?

• (A)  Homogeneous catalysis
• (B)  Heterogeneous catalysis
• (C)  Catalysis
• (D)  Ea

Answer

Submitted By :Ali Uppal

Anything which increases rate of reaction without being involved in the reaction________________?

• (A)  Promoter
• (B)  Catalyst
• (C)  Inhibitor
• (D)  All of the above

Answer

Submitted By :Ali Uppal