CHEMISTRY TEST - 1 - ISSB Pakistan

ACADEMIC TEST (Chemistry) -1 (QM)

ACADEMIC TEST (Chemistry) -1 (QM)

The number of attempts remaining is 100

1 / 10

1. What is the effect of mixing the anti freezing agent ethylene glycol in water?

A. none of these

B. Increases the freezing point

C. Decreases the FP and Increases BP

D. Decreases the boiling point

2 / 10

2. Space around nucleus where finding of electrons is maximum is

A. Orbital

B. orbit

C. Sub shell

D. Electron cloud

3 / 10

3. Which one of the following molecules shows high percentage of ionic
character?

A. HCI

B. HBr

C. HF

D. H₂O

4 / 10

4. The compressibility factor of an ideal gas is

A. 1

B. 4

C. 0

D. 2

5 / 10

5. The volume of 2.8 g of carbon monoxide at 27°C and 0.821 atm pressure is
(R=0.0821 lit. atm. Mol¹K')

A. 3 L

B. 30 L

C. 1.5 L

D. 0.3 L

6 / 10

6. When electrons revolve in stationary orbits,

A. There is increase in energy

B. They become stationary

C. There is no change in energy level

D. They are gaining kinetic energy

7 / 10

7. Which of the following units represents largest amount of energy?

A. Calorie

B. Electron volt

C. Erg

D. Joule

8 / 10

8. Evaporation of water is

A. A process where no heat changes occur

B. A process accompanied by chemical reaction.

C. An exothermic change

D. An endothermic change

9 / 10

9. The electro negativity of elements in a period from left to right

A. first increases then decreases

B. first decreases then increases

C. decreases

D. increase

10 / 10

10. If we consider that 1/6 in place of 1/12 mass of carbon atom is taken to be the
relative atomic mass unit, the mass of one mole of substance will be?

A. Increase two fold

B. Remains unchanged

C. Decrease twice

D. A function of the molecular mass of substance

Your score is

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Thank You for Your Judgement!!!

CHEMISTRY TEST - 1

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