Question # 1

The value of Kc for H2O at 25C° is

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1x10 (-14)mole dm-3

14 mol dm-3

1.86×10(-16) mol dm-3

1.0x10 (-7)moldm-3

Large molecules with high molecular mass formed due to smaller units ae called:

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polymer

macromolecule

micromolecule

a & b

The molecular speed Crms of gas is

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Independent of temperature

Proportional to the absolute temperature

Proportional to the square root of absolute temperature

Proportional to the square of absolute temperature

What does no happen when an ideal gas is heated?

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an increase in the average energy of the gas particles

an expansion in the range of kinetic energies possessed by particles

an increase in the number of molecules with lower energies

a drop in the number of molecules with lower energies

Cyclonite is a powerful:

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explosive

antiseptic

analgesic

anti-inflammatory

Naphthalene has two fused aromatic ring of carbon atom the molecular formula

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C10H8

C10H14

C10H10

C12H12

The energy produced by a carbohydrate is

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3 kcal/gm

2 kcal / gm

6kcal / gm

4 kcal/ gm

One gram of carbohydrate yields energy

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10 kcal

100 kcal

4 kcal

9 kcal

The existing property of an element in to more than are crystalline state is termed as:

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isomorphism

polymorphism

isotropy

allotropy

Which is a good nucleophile as well as a good leaving group?

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F-

Cl-

Br-

I-

Cellulose is the polymer of

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α-D-glucose

β-D-glucose

Fructose

None

Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

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Wurtz reaction

Cannizzaro reaction

Friedel Craft reaction

Claisen reaction

Size of an anion is increased as compared to its atom because of the

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Addition of new shell

Repulsion of electrons in the valence shell

Decrease in nuclear charge

Increase in the unclear charge

Acetic acids react with PCI5 giving:

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Acetamide

Acetyl chloride

Alcohol

Ether

Which of the following species is paramagnetic?

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CO₂

NO

O^2-

CN

When hydrogen cyanide is added to an Aldehyde in the presence of ammonia it is called

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Strecker synthesis

Cory house synthesis

Williamson;s synthesis

None of these

Oxidation of methyl alcohol gives

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Formaldehyde

Acetone

Ester

Acid

Alcohols, phenols and ethers may be considered as derivative of

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Hydrocarbons

Benzene

Carboxylic acid

Water

Which is the chain isomer of n-pentane

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Isopentane

Neopentene

N-pentene

Isopentene

Solutions containing relatively lower concentrations of solute are called :

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Concentrated solutions.

Lighter solutions.

Dilute solutions.

None of above.

Kolb's method has limited synthetic applications due to

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Expensive catalysis

Slow reaction

Number of side products produced

Salts used are very expensive

The main source of natural fibre is

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Animal fibres

Vegetables fibres

Mineral fibres

All of the above

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