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PPSC Chemistry Full Book Test MCQs With Answers

Question # 1

Two solids A and B have appreciable different solubility in water but their m.p. are very close. The mixture A and B can be separated by.

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Sublimation

Distillation

Fractional crystallization

Specific rotation

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Question # 2

Which of the following is the correct order of interactions.

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Covalent < hydrogen bonding < Van Der Waal's < dipole -dipole

Van der Waal's < hydrogen bonding < dipole -dipole < covalent

Van der Waal's < dipole -dipole < hydrogen bonding < covalent

Dipole-dipole < Van der Waal's < hydrogen bonding < covalent

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Question # 3

Which of the following will have the largest pH?

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O.1 N HCl

0.1 N CH3COOH

0.1 N NaOH

0.01 N NaOH

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Question # 4

Which of the following contains isoprene unite.

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Natural rubber

Nylong -6,6

Polyethylene

Decron

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Question # 5

Which one of the following statements regarding BF3 is not correct.

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It is an ionic compound

It is an electron deficient compound

It is a Lewis acid

It forms adducts

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Question # 6

Among the unit cells given below, which has the highest symmetry

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Monoclinic

Cubic

Hexagonal

Orthorhombic

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Question # 7

H-Bonding also ox in ling system like

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Protein

DNA

Botha A and B

None of above

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Question # 8

Which of the following linear polymer.

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Polypeptide

Protein

Starch

Phenol formaldehyde resin

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Question # 9

Which of the following species is very poor oxidizing agent

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H+

Zn²⁺

Fe³⁺

MnO₄

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Question # 10

Which of the following dye is used an antiseptic .

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Methyl orange

Mercurochrome

Alizarin

Bismarck brown

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