Question # 1

The reagent for alkaline hydrolysis of ethyl bromide to form ethyl alcohol is

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water at room T

Alcoholic KOH+heat

Ethanol + heat

dil. NaOH+ heat

The force which hold the atoms together to form a compound is called:

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Dispersion forces

London forces

A chemical bond

Ven der wall's forces

The enthalpy change AH of a process is given by the relation

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ΔΗ =ΔΕ + P∆V

ΔH=ΔE +W

ΔH =ΔΕ-ΔnRT

ΔΕ =ΔΗ + P∆V

The %age of nitrogen in urea is:

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46

60

70

80

The number of atoms in 0.004 g of magnesium is close to

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24

2 x 10²⁰

10²⁰

6.02 x 10²³

Dipole-dipole forces are present between:

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non-polar molecules

polar molecules

both polar and non-polar

none pf above

The hydrocarbon with maximum B.P is

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CH4

C6H14

C4H10

C2H6

Formation of Picric acid from phenol needs heating, one possible reason for it is

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acidity of phenol

e- donating nature of-OH

acidity of picric acid

e- with drawing effect of- NO2

Silk is an example of:

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animal fiber

vegetable fiber

mineral fiber

none of all

Simplest Structure of a protein that has only covalent bonding between amino acids is

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2° structure

3°structure

1° structure

4° structure

The relationship between volume of a given amount of gas and prevailing conditions of temperature and pressure are:

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Charle's law

Graham's law

Boyle's law

Gas laws

Which of the following is not a synthetic polymer?

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Polyethylene

PVC

Nylon

Cellophane

The functional group of acid amide is

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Which of the following has unchanged valency?

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H

Na

Fe

Oxygen

The shape of methanol, ammonia and water molecule can be explained by assuming

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Sp³hybridization

Sp²hybridization

Sp hybridization

All of these

How many isomeric disubtituted products are obtained by the introducing of second group in the ring

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Two

Three

Four

None

Which metal is used in the thermit process because of its activity?

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Iron

Copper

Alumnium

Zinc

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

Cell potential depends upon :

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Concentration of ions

Nature of electrolyte

Temperature

All of above

A current of 9.65 ampere flowing for 10 minutes deposits 3.0 g of the metal which is monovalent. The atomic mass of the metal is

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10

50

30

96.5

The apex angle of the folded filter paper is slightly greater is termed as:

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60 degree

30 degree

45 degree

90 degree

Ethylene polymerizes at 100 atm pressure and 400°C to give

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Polybenzene

Polyalcohol

Polypropylene

Polyethylene

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