Chemistry State of Matter (Solids) Mcqs Test Online Punjab 11th Class

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Question 1 of 17

Chemistry

1. Iron acts as an electrical conductor due to

Free ions

Free neutrons

Electron cloud

Free protons

Question 1 of 17

Question 2 of 17

2. Which of the following method is most suitable for obtaining a pure, dry sample of NaCl from a mixture of NaCl and sand?

Shake the mixture with water. Filter and dry the substances on the filter paper.

Shake the mixture with water. Filter and evaporate the filtrate.

Heat the mixture gently and collect the substances which boil off

Shake the mixture with water and distil off the sand

Question 2 of 17

Question 3 of 17

3. NaF and MgO have both atomic ration 1:1 in their crystals such property is

Isomorphism

Allotropy

Isotropy

Polymorphism

Question 3 of 17

Question 4 of 17

4. Lead and zinc can be separated by distillation because they have different.

Mass numbers

Boiling point

Densities

Reactivities

Question 4 of 17

Question 5 of 17

5. The spontaneous mixing of particles is called:

Evaporation

Sublimation

Diffusion

Boiling

Question 5 of 17

Question 6 of 17

6. The temperature at which two or more than two types of crystals exist in equilibrium is called.

Eutectic temperature

Melting Point

Transition temperature

Boiling point

Question 6 of 17

Question 7 of 17

7. A bottle of copper oxide has been contaminated with some sodium chloride. How can the NaCl be removed from the copper oxide?

Heat the mixture and allow it to cool

Add aqueous Ag NO₃ to the mixture

Add water to the mixture and filter

Place the mixture in a separating funnel

Question 7 of 17

Question 8 of 17

8. A crystal of the purple compound Potassium Permanganate placed at the bottom of a beaker of water and the beaker left until there is no further change. What will be observed?

A colourless liquid with the purple crystal unchanged

A Purple layer below a colourless layer

A colourless layer below a purple layer

A uniformly purple solution

Question 8 of 17

Question 9 of 17

9. The nature of bond in diamond is

Ionic

Molecular

Metallic

Covalent

Question 9 of 17

Question 10 of 17

10. Crystal Lattice is an arrangement of particles in

Two dimensions

One dimension

Three dimensions

Four dimensions

Question 10 of 17

Question 11 of 17

11. When gaseous ions are allowed to form a crystal, energy

Is sometimes absorbed and sometimes released

Is evolved

Has no effect

Is absorbed

Question 11 of 17

Question 12 of 17

12. Electric current can pass through graphite in one direction but not through other direction of crystal such a property is called

Anisotropy

Polymorphism

Isomorphism

Allotropy

Question 12 of 17

Question 13 of 17

13. What method could be used to obtain copper from mixture of pondered copper and sodium chloride?

Fractional distillation of the mixture

Adding excess water to the mixture and filtering

Passing an electric current through the mixture

Heating the mixture

Question 13 of 17

Question 14 of 17

14. The solids in which atoms, ions or molecules have random non-repetitive three dimensional arrangements are termed as:

Crystals

Glasses

Amalgams

Alloys

Question 14 of 17

Question 15 of 17

15. An insoluble solid was dropped into a measuring cylinder containing 50 cm³ of water. What will be the effect on volume of water?

15 cm³

65 cm³

17 cm³

50 cm³

Question 15 of 17

Question 16 of 17

16. The results of the accurate weighing of some crystals are as follows:
Mass of weighing bottle empty = 25.652 gm
Mass of weighing bottle + crystals = 26.541 gm
What is the mass of the crystals?

0.111 gm

0.889 gm

1.111 gm

1.889 gm

Question 16 of 17

Question 17 of 17

17. Lattice energy is also called

Energy of affinity

Ionization energy

Crystal energy

Bond Energy

Question 17 of 17

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