Due to many people pleading for more posts of past questions on CHM101 I have decided to publish some other questions.Read…………

1.The fraction of collision that brings about reaction is called…….

A)Energy collision

B)Effective collision

C)Collision factor

D)Frequency of collision

Ans;B

2.In a chemical reaction ,after 30s, 10moles from the initial concentration of 25moles of the reactant disappeared.The rate constant for the reaction is……

A)1.70×10^-²

B)1.20

C)3.05×10^-²

Ans;A

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3.A first order reaction is 40% complete after 20min the time taken for the reaction to be 65% complete is…….

A)35.02min

B)60.40min

C)0.025min

D)41.17min

Ans;D

4.What is the relative rate of diffusion for hydrogen molecules compared to those of oxygen molecules at the same temperature

A)4

B)2

C)6

D)8

Ans;A

5.The secondary quantum number determines the…….

A)Shape

B)Size

C)Energy

D)Shell

Ans;A

6.Inability of a scientists to judge color change correctly during acid base titration is an example of

A)Operative error

B)Personal error

C)Methodical error

D)Instrumental error

Ans:B

7.Solve the following and round off to the correct number of significant figures 5.61×7.891÷9.1

A)4.9

B)4.924

C)4.09

D)4.91

Ans;B(correct to 2 Sig fig)

8.A reducing agent does

A)Accepts electrons

B)Donates electrons

C)Donates proton

D)Donate a lone paid of electrons

Ans:D

9.The difference between an acid and its conjugate bases

A)Neutron

B)Proton

C)Positron

D)Electron

Ans;B

10.A temperature at which the water vapor present in the air is just sufficient to saturate it is called

A)Steam point

B)Dew point

C)Melting point

D)Ice point

Ans:B

The above questions are standard LAUTECH CHM101 Questions and answers.

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