Question # 1

The pH range of the acid rain is

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7 - 6.5

6.5 - 6

6 - 5.6

Less than 5

The nitrogen present in some fertilizer helps plants:

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to fight against diseases

to produce fat

to undergo photosynthesis

to produce protein

Which of the following is an application of electrochemical series

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Prediction of the feasibility of chemical reaction

Calculation of the cell voltage

Prediction of reaction of metal with dilute acid

All of the above

One of the following is neutral amino acid

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Arginine

Lysine

Glutamine

Valine

Terylen fibre is made by reaction of terephthalic acid with

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ethylene

ethylene glycol

glycol

terylene

When purely alcoholic solution of sodium/potassiumhydroxide and halogenoalkanes are reacted an alkene is formed, what is the mechanism of reaction?

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Elimination

Debromination

Dehydration

Reduction

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

Ozone is produced in regions:

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tropical

Polor

antaric

equator

According to kinetic theory of gases kinetic energy depends on

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Temperature

Collision

Pressure

Atomic number

Tertiary structure of proteins involves EXCEPT

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Domains

Globular

Fibrous

Beta sheets

Water has high boiling point which is due to:

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high electric constant

weak dissociation

high specific heat

H-bonding between its molecules

The percentage of carbon in different types of iron products is in the order of:

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Cast iron > wrought iron > steel

wrought iron > steel > cast rion

Cast iron > steel > wrought iron

Cast iron = steel > wrought iron

Vegetables oils are:

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Essential oils obtained form plants

None of these

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

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Blow air

Add Na₂CO₃

Use a specially made sorbent having flouring trapped in it

Use a sorbent having Al₂O₃trapped in it

Which of the following sulphates is not soluble in water

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium sulphate

Carboxylic acid can generally be prepared by various methods. Which of the following methods is not suitable for making carboxylic acids

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By the oxidation of primary alcohols

By the hydrolysis of nitriles

By the carbonation of Grignard, reagent

By the hydrolysis of p-amines

A solutiion of 0.5 mole camphor in 100 grmas chloroform (K_b= 0.322) has rise in boiling point than that of chloroform by

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0.81°C

1.61°C

1.81°C

0.61°C

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Which acid is used in the manufacture of synthetic fibre?

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

When the rate of reaction is entirely independent of the conc. of reaction molecules then order of reaction is

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Zero

First

Second

Third

Which of the following does not reflect the periodicity of elements?

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Bonding behaviour

Electronegativity

Ionisation potential

Neutral/proton ratio

When sodium metal reacts with alcohols

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Hydrogen gas evolves

Sodium hydroxide is obtained

Alcohol is reduced

Alcohol is polymerised

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