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

A. HCI

B. HBr

C. HF

D. H₂O

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

A. first decreases then increases

B. decreases

C. increase

D. first increases then decreases

4 / 10

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

A. Joule

B. Erg

C. Electron volt

D. Calorie

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. 30 L

B. 1.5 L

C. 3 L

D. 0.3 L

6 / 10

6. Evaporation of water is

A. A process accompanied by chemical reaction.

B. An exothermic change

C. A process where no heat changes occur

D. An endothermic change

7 / 10

7. When electrons revolve in stationary orbits,

A. They become stationary

B. They are gaining kinetic energy

C. There is no change in energy level

D. There is increase in energy

8 / 10

8. The compressibility factor of an ideal gas is

A. 4

B. 1

C. 0

D. 2

9 / 10

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

A. Decreases the boiling point

B. Decreases the FP and Increases BP

C. Increases the freezing point

D. none of these

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. Remains unchanged

B. Increase two fold

C. A function of the molecular mass of substance

D. Decrease twice

Your score is

Exit

Thank You for Your Judgement!!!

CHEMISTRY TEST - 1

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