Chemistry 11 mcqs Chapter 1 Basics Concepts

Preparation and solution of chemistry 11 MCQs are considered tough enough. MCQs of chemistry 11 are not such simple as other's books. Chemistry MCQs need a special and comprehensive explanation for solutions. So, here you are given a concept review of the most important chemistry mcqs of class 11.

Download or Preview chemistry 11 mcqs with answers to Chapter 1 Basics Concepts. These mcqs are also important for the preparation of the Entrance exam UHS NMDCAT  and UET. 

Chemistry 11 mcqs Importance

It is a tough and difficult task to solve chemistry 11 mcqs. Students must need full conceptual knowledge of chemistry 11 mcqs for excellent marks in chemistry 11.  All the important mcqs of chemistry 11 of chapter 1 Basics Concepts are here for you. These questions are taken from past papers of 1st-year chemistry of all Punjab Board of Pakistan as ;

Bahawalpur Board

D.G.Khan Board

Faisalabad Board

Gujranwala Board

Lahore Board

Multan Board

Rawalpindi Board

Post is created and designed with intense care and diligence.

These questions (MCQs) are top repetitive in Chemistry 11 Past Papers. Each question has a detailed answer explanation. In this way, you learn chemistry mcqs of the first year easily.

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About This Chapter

Chapter no. 1  Basics concepts of Chemistry11 enables the students to learn.

• Evidence of atom
• Molecule and its classification
• Difference between anion and cation
• Relative atomic mass (amu)
• Natural Abundance of Isotopes
• Mass Spectrometry
• Average Atomic Mass
• Combustion Analysis
• Difference between Empirical formula and a molecular formula
• Avogadro's number
• Stoichiometric assumptions
• Limiting reactant
• Yield and its Types

This Post "chemistry 11 chapter 1 Basics Concepts MCQs with Answers" covers all important MCQs that are top repetitive in past papers relevant to the above-mentioned topics.

👉For Answers to the following questions click the show answer button.

1. One amu is equal to:

(A) 1.661 × 10^-9 Kg

(B) 1.661 × 10^-31 Kg

(C) 1.661 × 10^-24 Kg

(D) 1.661 × 10^-27 Kg

(C) 1.661 × 10^-24 Kg

2. How many times a hemoglobin molecule is heavier than Hydrogen atom?

(A) 38000

(B) 88000

(C) 58000

(D) 68000

(D) 68000

3. A single chloride free radical can destroy how many ozone molecules?

(A) 100

(B) 100,000

(C) 1000

(D) 10

(B) 100,000

4. Out of 280 isotopes that occur in nature, the radioactive isotopes are:

(A) 66

(B) 56

(C) 40

(D) 24

(C) 40

5. The number of isotopes of Cadmium (Cd) is:

(A) Six

(B) Seven

(C) Eight

(D) Nine

(D) Nine

6. Ascorbic Acid is a Vitamin :

(A) A

(B) B

(C) C

(D) D

(C) C

7. The pressure of vapors maintained in the ionization chamber of the mass spectrometer during isotopic analysis :

(A) Around 10^-3 torr

(B) Around 10^-5 torr

(C) Around 10^-7 torr

(D) Around 10^-9 torr

(C) Around 10^-7 torr

8. The largest number of molecules are present in :

(A) 3.6 g of H₂O

(B) 4.8 g of C₂H₅OH

(C) 2.8 g of CO

(D) 5.4 g of N₂O₅

(A) 3.6 g of H₂O

9. The mass of one mole of the electron is

(A) 1.008g

(B) 0.55 mg

(C) 0.184 mg

(D) 1.673 mg

(B) 0.55 mg

10. The mass of CO₂ containing 8 grams of oxygen in grams is:

(A) 32

(B) 22

(C) 16

(D) 11

(D) 11

11. Formula Mass of CaCO₃ is:

(A) 70

(B) 80

(C) 90

(D) 100

(D) 100

12. The number of moles of CO₂ which contain 8.0 g of oxygen :

(A) 0.25

(B) 0.50

(C) 1.00

(D) 1.50

(A) 0.25

13. The Volume occupied by 28g of N₂ at STP is:

(A) 22.414 dm³

(B) 2.2414 dm³

(C) 224.14 dm³

(D) 1.12 dm³

(A) 22.414 dm³

14. The Volume occupied by 4.4 g of CO₂ at STP is :

(A) 22.414 dm³

(B) 2.2414 dm³

(C) 224.14 dm³

(D) 1.12 dm³

(B) 2.2414 dm³

15. The Volume occupied by 1.4 g of N2 at STP is:

(A)  2.24 dm³

(B) 22.4 dm³

(C) 1.12 dm³

(D) 112 cm³

(C) 1.12 dm³

16. 27 g of Al will react completely with how much mass of O2 to Produce Al2O3:

(A) 8 g of oxygen

(B) 16 g of oxygen

(C) 32 g of oxygen

(D) 24 g of oxygen

(D) 24 g of oxygen

17. What is the percentage of nitrogen in NH₄NO₃?

(A) 18%

(B) 36%

(C) 55%

(D) 65%

(A) 18%

18. How many atoms of carbon are there in 18g of C₆H₁₂O₆?

(A) 6.02 × 1023

(B) 9.11 × 1023

(C) 3.6 × 1023

(D) 3.6 × 1022

(C) 3.6 × 1023

19. The number of molecules in 9g of ice?

(A) 3.01 × 10²³

(B) 3.01 × 10²⁴

(C) 6.02 × 10²³

(D) 6.02 × 10²⁴

(A) 3.01 × 10²³

20. One mole of SO₂ contains ---- atoms of Sulphur :

(A) 6.02 × 10²³

(B) 6.02 × 10²⁴

(C) 6.02 × 10^-23

(D) 6.02 × 10^-24

(A) 6.02 × 10²³

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