Unit 1: Fundamentals of Chemistry

1. Industrial chemistry deals with manufacturing of compounds

a. in the laboratory
b. on micro scale
c. on commercial scale
d. on economic scale

2. Which of the following compounds can be separated by physical means?

a. mixture
b. element
c. compound
d. radical

3. The most abundant element occurring in the oceans is

a. oxygen
b. hydrogen
c. nitrogen
d. silicon

4. Which of the following element is found in most abundance in the Earth’s crust?

a. oxygen
b. aluminium
c. silicon
d. iron

5. The third abundant gas found in the Earth’s atmosphere is?

a. carbon monoxide
b. oxygen
c. nitrogen
d. argon

6. One amu (atomic mass unit) is equivalent to:

a. 1.66 X 10^-24 mg
b. 1.66 X 10^-24 g
c. 1.66 X 10^-24 kg
d. 1.66 X 10^-23g

7. Which one of the following molecule is not tri-atomic?

a. H₂
b. O₃
c. H₂O
d. CO₂

8. The mass of one mole of water is:

a. 18 amu
b. 18 g
c. 18 mg
d. 18 kg

9. The molar mass of H₂SO₄

a. 98 g
b. 98 amu
c. 9.8 g
d. 9.8 amu

10. Which one of the following is a molecular mass of O₂ in amu?

a. 32 amu
b. 53.12 x 10^-24 amu
c. 1.92 x 10^-25 amu
d. 192.64 x 10^-25 amu

11. How many number of moles are equivalent to 8 grams of CO₂?

a. 0.15
b. 0.18
c. 0.21
d. 0.24

12. Which one of the following pairs has the same number of ions?

a. 1 mole of NaCl and 1 mole of MgCl₂
b. 1/2 mole of NaCl and 1/2 mole of MgCl₂
c. 1/2 mole of NaCl and 1/3 mole of MgCl₂
d. 1/3 mole of NaCl and 1/2 mole of MgCl₂

13. Which one of the following pairs has the same mass?

a. 1 mole of CO and 1 mole of N₂
b. 1 mole of CO and 1 mole of CO₂
c. 1 mole of O₂ and 1 mole of N₂
d. 1 mole of O₂ and 1 mole of CO₂

The End!