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Punjab 11th Class Chemistry Chapter 1 Basic Concepts MCQs Test Online

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Question 1 of 10

Chemistry

1. 27 g of Al will react completely with how much mass of O₂ to produce Al₂O₃

1.8g of oxygen

2.16g of oxygen

3.32g of oxygen

4.24g of oxygen

Question 1 of 10

Question 2 of 10

2. Isotopes differ in

1.arrangement of electrons in orbital

2.chemical properties

3.properties which depend upon mass

4.the extent to which they may be affected in the electromagnetic field

Question 2 of 10

Question 3 of 10

3. Many elements have fractional atomic masses, this is because

1.atomic masses are average masses of isotopes

2. atomic masses are average masses of isotopes proportional to their relative abundance.

3.atomic masses are average masses of isotopes

4.the mass of the atom is itself fractional

Question 3 of 10

Question 4 of 10

4. One mole of SO2 contains

1.6.02 x 1023 atoms of sulphur

2.6.02 x 1023 atoms of oxygen

3.4g atom of SO2

4.1.81x 1023 molecules of SO2

Question 4 of 10

Question 5 of 10

5. A limiting reactant is the one which

1.is taken in lesser quantity in grams as compared to other reactants

2.is taken in lesser quantity in volume as compared to the other

3.gives the minimum amount of the product under consideration

4.carries the maximum amount of the product which is required

Question 5 of 10

Question 6 of 10

6. The number of moles of CO2 which contain 8 g of oxygen

1.1.5

2.0.25

3.1

4.0.50

Question 6 of 10

Question 7 of 10

7. The largest number of molecules is present in

1.4.8g of C2H5OH

2.5.4g of N2O5

3.3.6g of H2O

4.2.8g of CO

Question 7 of 10

Question 8 of 10

8. The volume occupied by 1.4g of N2 at STP is

1.112cm3

2.22.4dm3

3.1.12dm3

4.2.24dm3

Question 8 of 10

Question 9 of 10

9.

Which of the following statement is not true?

1.Isotopes with odd atomic masses are comparatively abundant.

2.Isotopes with even atomic masses and odd atomic numbers are comparatively abundant.

3.Isotopes with even atomic masses are comparatively abundant

4.Isotopes with even atomic masses and even atomic numbers are comparatively abundant.

Question 9 of 10

Question 10 of 10

10. The mass of one mole of electrons is

1.1,008mg

2.0.55mg

3.0.184mg

4.1.673mg

Question 10 of 10

Test By Subject	Punjab
Test By Topics	11th Class Chemistry

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Punjab 11th Class Chemistry Chapter 1 Basic Concepts MCQs Test Online