Chemistry MCQ's Test 2

20:42:00 Unknown 2 Comments

Here is another test from chemistry for the preparation of entry test for UET, NUST, AIR, PIEAS, Engineering Universities and Medical colleges.

1. In an accident at a factory, some nitric acid was spilt. Which substance, when added in excess, would neutralize the acid without leaving an alkaline solution.

A) Aquous ammonia
B) Calcium carbonate
C) Sodium Carbonate
D) Aqueous sodium hydroxide

2. The alkene which produces only ketones upon ozonolysis?

A) Ethane
B) Propene
C) 2-butene
D) none

3. N +3H ààÜ 2NH + heat. The activation energy for the forward as well as backward reaction is 2 2 áàà 3 decreased by 100 J, then the equilibrium amount of NH3 will

A) Increase
B) Decrease
C) Remains constant
D) Cannot prdict

4. Which among the following is correct about the energy sequence( in case of H-atom)

A) 3s B) 3s=3p=3d
C) 3s>3p>3d
D) 3s>3p<3d>

5. Which of the following is the b3est method of separating the mixture of inks?

A) Centrifuging
B) Chromatography
C) Distillation
D) Filtration

6. How many moles of oxygen O2 are needed for the complete combustion of 2 moles of Butane, C H 4 10

A) 2
B) 10
C) 8
D) 13

7. When aqueous ammonium chloride was heated with aqueous Y, a gas which turned Universal Indicator paper blue was evolved. Which ion must have been present in Y?

A) Cl-
B) H+
C) OH-
D) Na+

8. Which of the following is not an industrial use of chlorine

A) Making cooking slats
B) Making domestic bleaches
C) Making hydrochloric acid
D) Making PVC plastics

9. When acetone and chloroform are mixed, hydrogen bonding takes place between then; such a liquid pair will cause

A) Positive deviation from Raoults law
B) Negative deviation from Raoults law
C) Obeys Raoults law
D) Cannot be predicts

10. Which salt when added in water decreases the pH of solution.

A) Na2SO4
B) CuSO4
C) Na2BO7
D) K2CO3