Question 1 of 10

Chemistry

1. The largest number of molecules is present in

1.3.6g of H2O

2.5.4g of N2O5

3.4.8g of C2H5OH

4.2.8g of CO

Question 1 of 10

Question 2 of 10

2. 27 g of Al will react completely with how much mass of O₂ to produce Al₂O₃

1.32g of oxygen

2.8g of oxygen

3.24g of oxygen

4.16g of oxygen

Question 2 of 10

Question 3 of 10

3. One mole of SO2 contains

1.1.81x 1023 molecules of SO2

2.6.02 x 1023 atoms of oxygen

3.6.02 x 1023 atoms of sulphur

4.4g atom of SO2

Question 3 of 10

Question 4 of 10

4. A limiting reactant is the one which

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

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

3.gives the minimum amount of the product under consideration

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

Question 4 of 10

Question 5 of 10

5. The mass of one mole of electrons is

1.1,008mg

2.0.184mg

3.1.673mg

4.0.55mg

Question 5 of 10

Question 6 of 10

6. Isotopes differ in

1.chemical properties

2.properties which depend upon mass

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

4.arrangement of electrons in orbital

Question 6 of 10

Question 7 of 10

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

1.0.50

2.0.25

3.1

4.1.5

Question 7 of 10

Question 8 of 10

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

1.112cm3

2.2.24dm3

3.1.12dm3

4.22.4dm3

Question 8 of 10

Question 9 of 10

9. 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.the mass of the atom is itself fractional

4.atomic masses are average masses of isotopes

Question 9 of 10

Question 10 of 10

10.

Which of the following statement is not true?

1.Isotopes with even atomic masses are comparatively abundant

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

3.Isotopes with odd atomic masses are comparatively abundant.

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

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

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

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

Chemistry

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