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 of the following units represents largest amount of energy?

A. Joule

B. Calorie

C. Erg

D. Electron volt

2 / 10

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

A. Sub shell

B. Orbital

C. Electron cloud

D. orbit

3 / 10

3. 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. 3 L

D. 30 L

4 / 10

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

A. HCI

B. HF

C. H₂O

D. HBr

5 / 10

5. 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. A function of the molecular mass of substance

C. Decrease twice

D. Remains unchanged

6 / 10

6. Evaporation of water is

A. An endothermic change

B. An exothermic change

C. A process where no heat changes occur

D. A process accompanied by chemical reaction.

7 / 10

7. The compressibility factor of an ideal gas is

A. 2

B. 4

C. 1

D. 0

8 / 10

8. 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

9 / 10

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

A. Decreases the boiling point

B. none of these

C. Increases the freezing point

D. Decreases the FP and Increases BP

10 / 10

10. When electrons revolve in stationary orbits,

A. There is no change in energy level

B. There is increase in energy

C. They are gaining kinetic energy

D. They become stationary

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CHEMISTRY TEST - 1

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