Chemistry Fundamental Concepts Test Online Mcqs Preparation

Chemistry Fundamental Concepts Test Online Mcqs Preparation With Answers Start Below

Show paginator

Hide paginator

Question 1 of 15

1. 1 gram molecule refers to:

A. Amount in grams equivalent to 1 mole of a molecule or a compound

B. Amount in grams of an ionic compound

C. Amount in grams equivalent to 1 mole of a molecule

D. Amount in grams equivalent to 1 mole of an atom

Question 1 of 15

Question 2 of 15

2. In a mass spectrometer, increasing the magnetic field strength with constant electric field result in

A. Increased radius ‘r’

B. No effect

C. Increased ionization

D. Increased ionization

Question 2 of 15

Question 3 of 15

3. Mg reacts with HCl as per the following reactions:
Mg_(s) + 2HCl_(aq) → MgCl_2(aq) + H_2(g)Given that; Mg = 21g and HCl = 21g, the excess reactant is;

A. HCl

B. Mg

C. None of these

D. Both are present in equal stoichiometric amount

Question 3 of 15

Question 4 of 15

4. Combustion analysis is performed for the determination of

A. Structural formula of the substance

B. Molar mass of the compound

C. Empirical formula of the compound

D. Mass of halogens present in organic compound

Question 4 of 15

Question 5 of 15

5. A compound contains 50% sulphur and 50% oxygen by mass. The empirical formula of the compound is:

A. SO3

B. SO2

C. SO

D. S2O3

Question 5 of 15

Question 6 of 15

6. A smuggler was caught by Airport police and 24 g of diamond was recovered from him. How many atoms of carbon he was carrying

A. 2.4 x 1024

B. 1.8 x 1024

C. 6 x 1023

D. 1.2 x 1024

Question 6 of 15

Question 7 of 15

7. Which one is mono isotopic element?

A. H

B. Cd

C. F

D. Cl

Question 7 of 15

Question 8 of 15

8. The separation of different isotopes in the mass spectrometer is done on the basis of:

A. Velocities of the ions

B. Different amounts of positive change on each ion

C. Different m/e

D. Different e/m value

Question 8 of 15

Question 9 of 15

9. One mole of SO₂ contains:

A. 18.1 x 1023 molecules of SO2

B. 4 g atoms of SO2

C. 6.002 x 1023 atoms of Oxygen

D. 6.002 x 1023 atoms of Sulphur

Question 9 of 15

Question 10 of 15

10. One mole of potassium chlorate is thermally decomposed and excess of aluminum is burnt in gaseous mixture. How many moles of aluminum oxide are formed? Respective equations are given as
2KClO₃ → KCl + 3O₂ 4Al + 3O₂ → 2Al₂O₃

A. 1.5

B. 1

C. 2

D. 3

Question 10 of 15

Question 11 of 15

11. 1 gram formula refers to:

A. Amount in grams equivalent to 1 mole of a ionic compound

B. Amount in grams equivalent to 1 mole of an atom

C. Amount in grams equivalent to 1 mole of an ion

D. Amount in grams equivalent to 1 mole of a covalent compound

Question 11 of 15

Question 12 of 15

12. In a mass spectrometer, increasing the electric field with constant magnetic field results in

A. Increased radius ‘r’

B. Increased ionization

C. None of the above

D. Decreased radius ‘r’

Question 12 of 15

Question 13 of 15

13. Which of the following compounds has the highest % age of oxygen by weight?

A. H2O

B. HCCOOH

C. CH3 – OH

D. C2H5 – OH

Question 13 of 15

Question 14 of 15

14. When 0.5 moles of Al₂(SO₄)₃ are dissolved in water, total number of particles produced

A. 1.2 x 1023

B. 1.5 x 1024

C. 2.5 x 1023

D. 3.0 x 1023

Question 14 of 15

Question 15 of 15

15. How many electrons have to be removed to ionize 1.0 x 10^-6 mol of Ne atoms to Ne⁺ ions in a neon advertising tube?

A. 1.0 x 10-6 x 6.02 x 1023 / 20.2

B. 1.0 x 10-6 x 6.02 x 1023

C. 6.02 x 1023 / 1.0 x 10-6

D. 1.0 x 10-6 x 6.02 x 1023 / 9.65 x 10-1

Question 15 of 15

Pages

Categories

Chemistry Fundamental Concepts Test Online Mcqs Preparation

Chemistry Fundamental Concepts Test Online Mcqs Preparation With Answers Start Below

Related Study Posts:

Leave a Reply Cancel reply