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 FP and Increases BP

D. Decreases the boiling point

2 / 10

2. When electrons revolve in stationary orbits,

A. There is no change in energy level

B. They become stationary

C. There is increase in energy

D. They are gaining kinetic energy

3 / 10

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

A. Orbital

B. Electron cloud

C. Sub shell

D. orbit

4 / 10

4. 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. 3 L

C. 30 L

D. 0.3 L

5 / 10

5. The compressibility factor of an ideal gas is

A. 4

B. 2

C. 1

D. 0

6 / 10

6. 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

7 / 10

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

A. decreases

B. first decreases then increases

C. increase

D. first increases then decreases

8 / 10

8. 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. Decrease twice

C. A function of the molecular mass of substance

D. Remains unchanged

9 / 10

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

A. Erg

B. Electron volt

C. Calorie

D. Joule

10 / 10

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

A. HBr

B. HF

C. HCI

D. H₂O

Your score is

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Thank You for Your Judgement!!!

CHEMISTRY TEST - 1

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CHEMISTRY TEST - 1

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