State of Matter MCQ question and answer with solution

61

Sea water can be purified by the process of

A) distillation B) evaporation C) filtration D) fractional distillation

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Answer & Solution

Answer: Option A

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62

The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point. The melting point of a solid is an indication of

A) strength of the intermolecular forces of attraction B) strength of the intermolecular forces of repulsion C) molecular mass D) molecular size

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Answer & Solution

Answer: Option A

Solution:

Melting point is the temperature at which a solid changes into liquid at atmospheric pressure.

If a solid has strong intermolecular forces of attraction, more heat energy is required to overcome these forces, therefore its melting point will be higher.

If the intermolecular forces are weak, less heat energy is required, and the melting point will be lower.

Thus melting point basically reflects how strongly the particles of a substance attract each other.

Hence it indicates the strength of intermolecular forces of attraction.

63

Milk is an

A) emulsion B) suspension C) foam D) gel

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Answer & Solution

Answer: Option A

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64

Cloud is a colloidal dispersion of

A) air in a dispersion medium of water B) fog in a dispersion medium of water C) mist in a dispersion medium of air D) water drops in a dispersion medium of air

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Answer & Solution

Answer: Option D

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65

A pressure cooker works on the principle of

A) elevation of boiling point of water by application of pressure B) making the food-grains softer by application of pressure C) making the food-grains softer by application of pressure and temperature D) keeping the food-grains inside steam for a longer time

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Answer & Solution

Answer: Option A

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66

Quartzis a crystalline form of

A) alumina B) glass C) silica D) limestone

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Answer & Solution

Answer: Option C

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67

Which one of the following statements is not correct?

A) All carbons in diamond are linked by carbon-carbon single bond B) Graphite is layered structure in which layers are held together by weak Vander Waal's forces C) Graphite layers are formed by hexagonal rings of carbon atoms D) Graphite layers are held together by carbon-carbon single bond

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Answer & Solution

Answer: Option D

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68

Which one of the following gemstones contains beryllium metal?

A) Topaz B) Emerald C) Ruby D) Blue sapphire

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Answer & Solution

Answer: Option B

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69

Statement I All compounds contain more than one element.
Statement II All compounds are heterogeneous mixtures.

A) Both the statements are individually true and statement II is the correct explanation of statement I B) Both the statements are individually true but statement II is not the correct explanation of statement I C) Statement I is true, but statement II is false D) Statement I is false, but statement II is true

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Answer & Solution

Answer: Option C

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70

The temperature to which a gas must be cooled before it can be liquefied by compression is called

A) Boyle's temperature B) critical temperature C) liquefaction temperature D) inversion temperature

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Answer & Solution

Answer: Option B

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State of Matter MCQ question and answer with solution | Chemistry Gk MCQs