Question # 1

Which of the substance is not going to react the sodium metal:

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Acetic acid

Methanol

Di methyl ether

Ethanol

On hydrolysis sucrose gives:

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glucose and maltose

fructose and lactose

fructose and maltose

glucose and Fructose

Monomer for acrylic resins is

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Acrylic acid

Methylmethacrylate

Acryloritrile

All

The rate of diffusion of a gas is inversely proportional to:

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Density of a gas

Velocity of the gas

Viscosity of the gas

All of above

Keeping in view different factors which affect the melting point of a substance.the compound having melting point among the following is:

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LiCl

NaCl

CsCl

RbCl

The enthalpy change for the reaction C2H2 + 5/2 O2 --------> 2CO2 + H2O is known as enthalpy of

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Fomation of CO2

Fusion ofC2H4

Combustion of C2H4

Vaporization of C2H2

Which of the following is a non-crystalline solids pair

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Diamond, wood

Glass, table salt

Wood, glass

Sucrose, glass

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will:

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reduced to 1/4

be double

increases four times

remains unchanged

By increasing the concentration of reactants, the rate of reaction

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Decreases

Increases

Remains constant

Not predicted

The words smog is a combination of smoke and:

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fog

foke

fork

fizzy

In Pakistan consumption per person is:

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8kg

5kg

10kg

6kg

Which reagent will distinguish a ketone from an aldehyde

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Br₂

2, 4-dinitrophenylhydrazine

NaBH₄

Tollen's reagent

The product of addition polymerization reaction is

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PVC

Nylon

Terylene

Polyamide

3-d series elements are present in:

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First period

Second Period

Third period

4th period

Which one of the following elements is not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

Enzymes, in the living systems

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Provide energy

Provide immunity

Transport oxygen

Catalyze biochemical processes

Alkyl benzenes are readily oxidized by axidfied

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KMnO₄

K₂CO₃

MnO₄

H₂SO₄

Which substances are mixed to form a buffer solution?

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A strong acid and its salt of a strong base

Strong acid and its salt of weak base

Weak acid and its salt of strong base

Weak acid and its salt of weak base

The number of unpaired electrons in Fe³⁺(Z = 26) are

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5

6

3

4

pH of 1 molar NaOH is

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7

zero

14

10

Which statement about Arrhenius equation is incorrect

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Factor 'A' called Arrhenius constant depends upon collision frequency of reactants

Rate of reaction increase by increasing temperature

Rate constant k is increased

Activation energy Ea is decreased by rise in temperature

10g Of NaOH Has Been Dissolved Perdm³of solution. The morality of solution is :

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0.025 M

1.5 M

0.1 M

.25 M

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