9th chemistry chapter 1 solved exercise MCQs

Fundamentals of chemistry

9th chemistry chapter 1 solved exercise MCQs

1. Industrial chemistry deals with the manufacturing of compounds :

(a) in the laboratory

(b) on micro scale

(c) on commercial scale 🗸

(d) on economic scale

2. Which one 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 one of the following elements 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) 1.66e-24 mg

(b) 1.66e-24 g 🗸

(c) 1.66e-24 kg

(d) 1.66e-24 g

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

(a) H2 🗸

(b) O3

(c) H2O

(d) CO2

8. The mass of one molecule of water is :

(a) 18 amu 🗸

(b) 18 g

(c) 18 mg

(d) 18 kg

9. The molar mass of H2SO4 is :

(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) 53.12e-24 amu

(c) 1.92e-25 amu

(d) 192.64e-25 amu

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

(a) 0.15

(b) 0.18 🗸

(c) 0.12

(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 MCl2

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 detailed solution of these mcqs is given in this video :
9th chemistry , chapter 1 , Fundamentals of chemistry , solved exercise MCQs
9th Chemistry , chapter 1 , Fundamentals of chemistry , solved exercise short questions , hand written notes, free notes

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