Question # 1

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

An element that is not an essential par of proteins is

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O

N

H

S

Which one of the following is not type of polemer

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Copolymer

Homopolymer

Terpolymer

Heteropolymer

Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect

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Nose

Stomach

Eyes

Ears

The relationship which describes the variation of vapour pressure with temperature is called

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Hess's law

Arrhenius equation

Kirchhoff's law

Clausius-Clapeyron equation

The beaker contains slurry of ice and water, the three thermometers Fahrenheit, Kelvin and centigrade placed init. the thermometers are represented as A, B and C respectively, On which thermometer the lowest reading will be?

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B

A

C

both A and B

Charles s law is only satisfied if temperature is taken on

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Kelvin scale (b)

Celsius scale (°C)

Fahrenheit scale (°F)

All of these

Which of the following bonds is not present in NH4CL

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lonic bond

Covalent bond

Co-ordinate covalent bond

De-localized covalent bond

Which one is not postulated in the kinetci molecular theory among the following?

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molecules are in chaotic motion

molecules of all the gases have same size and same mass

the volume of the molecules is negligible

all molecular collisions are elastic

Terylen fibre is made by reaction of terephthalic acid with

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ethylene

ethylene glycol

glycol

terylene

According to kinetic theory of gases there are

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Intermolecular attractions

Molecules which have considerable volume

No intermolecular forces of attraction

The velocity of molecules decreases for each collision.

The substances which are added to the soil to provide one or more nutrient elements essential for plant growth are called

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Minerals

Hormones

Fertilizers

None of these

Kinetic energy of the molecules is due to

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Transnational motion

Rotational motion

Vibrational motion

All of these

Which of the following sulphates has the highest solubility in water

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BaSO₄

CaSO₄

MgSO₄

BeSO₄

Phenol was discovered by:

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Hofmann

Runge

Henderson

Bakelite

In a lime kiln, to get higher yield of CO₂, the measure that can be taken is

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To main high temperature

To pump out CO₂

To remove Cao

To add more CaCO₃

The number of unpaired electrons in Mn²⁺is

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5

4

3

2

Which three elements are needed for the healthy growth of plants?

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N,S,P

N,Ca, P

N,P,K

N,K,C

3.6% WN solution of HCI has the molairity

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1.0

1.15

0.98

1.98

BiCl₃on hydrolysis forms a white precipitate of

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Bismuthio acid

Bismuth oxychloride

Bismuth pentachloride

Bismuth hydroxide

Ethyl bromide on treatment with alcoholic KOH gives

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Ethylene

Ethanol

Acetic Acid

Ethane

18 g glucose is dissolved in 90 g of water. The relative lowering vapor pressure is equal to :

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1/5

5.1

1/51

6

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