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Online Solved MCQs Objective Type Chemistry MCQs

Q.1: End name of enzyme is----------- ?

1. yl
2. ase
3. one
4. al

B

Q.2: Three elements needed for the healthy growth of plants are----------- ?

1. N P K
2. N K C
3. N S P
4. N Ca P

A

Q.3: On increasing the temperature the rate of reaction increases mainly because--------- ?

1. The activation energy of the reaction increases
2. Concentration of the reacting molecules increases
3. Collision frequency increases
4. None of these

C

Q.4: Which statement is wrong ?

1. the amount of ozone layer is greater in the region close to the equator
2. ozone acts as filter for UV radiations
3. in the equatorial region it acts as pollutant
4. CFCs play effective role in removing O3 in the stratosphere

A

Q.5: Activated complex is formed due to--------- ?

1. Pressure
2. Effective collision
3. Ineffective collisions
4. Temperature

B

Q.6: Energy of activation for backward reaction is less than forward reaction for ----------- reactio ?

1. Endothermic
2. Exothermic
3. Moderate
4. Fast

A

Q.7: When catalysts and reactants are in more than one phase it is------------ ?

1. Homogeneous catalysis
2. Heterogeneous catalysis
3. Catalysis
4. Ea

B

Q.8: Conversion of reactant into product in unit time is called-------- ?

1. rate of forward reaction
2. rate of backward reaction
3. rate constant
4. rate co-efficient

A

Q.9: Addition of CH3COOH and CH3COONa gives in water--------- ?

1. Standard solution
2. buffer solution
3. acidic buffer solution
4. both B AND C

D

Q.10: Kc value has----------- ?

1. No units
2. Units
3. Both A & B
4. None

C