Question # 1

Which of the following is an addition polymer

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Polyester

Polystyrene

Nylon 6,6

Terylene

The strength of binding energy of transition elements depends upon

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number of electron pairs

number of unpaired electron pairs

number of neutrons

number of protons

Bone ash contain calcium phosphate

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40%

50%

70%

80%

Which substance is used to consulate rubber latex

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Ethyl alcohol

Acetaldehyde

Acetic acid

Water

Geometrical isomerism in alkene is due to.

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C = C free rotation of bond

No C = C free rotation of bond

Presence of multiple bond only

Opticla rotation due to multiple bond

Phenol can be prepared from chlorobenzene by

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Williamson synthesis

Down's process

Kolbe reaction

Cannizzaro reaction

Linear shape is associated with set of hybrid orbitals

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SP

sp²

dsp²

sp³

Which one of the following comp9ounds on hydrolysis will not produce a carboxylic acid.

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Alkyl halide

Alkyl Nitrite

Addition product of Grignard reagent and CO2

Ester boiled with sodium hydroxide

Which ion will have the maximum value of heat of hydration.

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Na+

Ca+

Ba+2

Mg+2

Conversion of phenol to benzene is known as.

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Oxidation

Reduction

Hydrolysis

Hydration

Pulp is washed to remove lignin from it. Due to the presence of lignin in pulp paper becomes.

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Soft

Brittle

Acidic

Colourless

The quality of petroleum is determined by

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Decane number

Octane number

Hexane number

Gold number

Which of the following is a reddish brown gas

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N₂O₃

NO₂

N₂O₃

N₂O₅

During nitration of benzene, the active nitrating agent is

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NO₃

NO₂⁺

NO₂^-

HNO₃

Out of the elements of group VIA the highest melting and boiling points is shown by the element.

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Te

Se

S

Po

Which one of the following elements burns in air to form an oxide which, when shaken with water, give a solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

Starch is polymer is

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Fructose

a -d Glucose

Sucrose

B-D-Glucose

Which one of the following compounds show geometrical isomerism in it.

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1- pentene

1,1 dichloro ethane

all of these

2- Pentene

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