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. Increases the freezing point

B. none of these

C. Decreases the boiling point

D. Decreases the FP and Increases BP

2 / 10

2. The compressibility factor of an ideal gas is

A. 1

B. 0

C. 2

D. 4

3 / 10

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

A. HF

B. H₂O

C. HBr

D. HCI

4 / 10

4. Evaporation of water is

A. A process where no heat changes occur

B. An endothermic change

C. A process accompanied by chemical reaction.

D. An exothermic change

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. 0.3 L

B. 1.5 L

C. 3 L

D. 30 L

6 / 10

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

A. Electron cloud

B. Orbital

C. Sub shell

D. orbit

7 / 10

7. When electrons revolve in stationary orbits,

A. They become stationary

B. There is increase in energy

C. They are gaining kinetic energy

D. There is no change in energy level

8 / 10

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

A. Calorie

B. Electron volt

C. Erg

D. Joule

9 / 10

9. 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. A function of the molecular mass of substance

D. Decrease twice

10 / 10

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

A. increase

B. first increases then decreases

C. first decreases then increases

D. decreases

Your score is

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CHEMISTRY TEST - 1

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