Question # 1

The spreading of ink on blotting paper is due to

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capillary action

hydrogen bonding

intermolecular forces of the ink

intermolecular forces of the ink and paper

organic synthetic or man made polymers are plastics, rubber and fibre, Which is not a synthetic polymer

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silk

polyester

polyvinyl chloride (PVC)

nylon

The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as

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saran fibre

nylon

polyester

acetate fibre

Sugar crystals belong to the system

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cubic

monoclinic

triclinic

orthorhombic

One atmosphere is equal ___________ Pascal

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760

101325

14.7

1.01325

NO and NO₂gases in atmosphere are represented by

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NO

NO₄

NO_x

N_xO_y

Which of the following substance is used as filler or additive in paper making:

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Glucose

Starch

Fructose

Cellulose

The layer of gases around the earth are called?

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Atmosphere

Hydrosphere

Lithosphere

All of these

Identify the compound, which give iodoform test

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Methanol

3- Hexanol

Methyl ketone

Propionaldehyde

Ozone gas has boiling point:

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Low

High

Medium

Highest

Polymers class is:

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homopolymer

copolymer

ter polymer

All of these

In Friedal-Craft's alkylation besides AlCl3 the other reactants are

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C6H6 + NH3

C6H6 + NH4

C6H6 + CH3Cl

C6H6 + CH3COCl

Which are used as essences(flowers)?

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aldehydes

Ketones

alcohols

esters

Which reaction is of condensation or addition elimination reaction?

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Ketol

Aldol

Cannizzaro

All of these

Which is a good nucleophile?

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F^-1

Cl^-1

Be^-1

I^-1

Heaviest particle is

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Meson

Neutron

Proton

Electron

Which of the following has unchanged valency?

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H

Na

Fe

Oxygen

Which is true about the electronegativity order of the following?

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P > Si

C > N

Br > Cl

Sr > Ca

Which following derivative cannot be prepared directly from acetic acid?

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Acetamide

Acetyl chloride

Acetic anhdride

Ethyl acetate

During the mechanism of aldol condensation a/an ______ is formed

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Oxide

Alkali

Alkoxide ion

None of these

According to Mendeleev, the properties of the elements are periodic function of their

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Atomic number

Atomic volumes

Atomic masses

Atomic densities

Which one of the following is a buffer

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HCI + NaCI solution

CH₃COOH + CH₃COONH₄solution

H₂SO₄+ CaSO₄solution

CH₃COOH + CH₃COONa

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