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. The compressibility factor of an ideal gas is

A. 1

B. 0

C. 4

D. 2

2 / 10

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

A. HCI

B. H₂O

C. HF

D. HBr

3 / 10

3. 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. Decrease twice

B. Remains unchanged

C. A function of the molecular mass of substance

D. Increase two fold

4 / 10

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

A. increase

B. first decreases then increases

C. first increases then decreases

D. decreases

5 / 10

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

A. Joule

B. Calorie

C. Electron volt

D. Erg

6 / 10

6. When electrons revolve in stationary orbits,

A. They are gaining kinetic energy

B. There is no change in energy level

C. There is increase in energy

D. They become stationary

7 / 10

7. 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. 1.5 L

B. 0.3 L

C. 30 L

D. 3 L

8 / 10

8. Evaporation of water is

A. A process accompanied by chemical reaction.

B. A process where no heat changes occur

C. An exothermic change

D. An endothermic change

9 / 10

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

A. Increases the freezing point

B. none of these

C. Decreases the boiling point

D. Decreases the FP and Increases BP

10 / 10

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

A. Electron cloud

B. Sub shell

C. orbit

D. Orbital

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