Question # 1

The film forming components of paints are

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resins

thinners

pigments

driers

Among the following the polycyclic aromatic compound is

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Styrene

Naphthalene

Toluene

Acetophenone

An acid that exists as a cyclic dimer in benzene and shows a molar mass of 120g/mol is

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СН3СOOH

HCOOH

CI2CHCOOH

Сl3CCOOH

Arginine, lysine and ornithine are

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Obtained by hydrolysis of proteins

Essential amino acids

Basic amino acids

Derived from butyric acid

Which group activates the benzene ring

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-COOH

-COR

-CHO

-OH

Benzene cannot undergo the ------- directly

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

If a reaction involves only solids and liquids, which of the following is true?

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ΔH = ΔE

ΔΗ =ΔΕ

ΔH>ΔΕ

AH =AE +nRT

Global warming is mainly caused by ______ radiations

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UV

I.R

gama

X-rays

Methyl mercaptan, CH₃SH, is one of the substances responsible for bad breath and is often used to impart a smell to natural gas in a pipeline.
What will be formed when CH₃SH is burned in an excess of air?

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CO CO₂ H₂S

CO H₂O SO₃

CO₂ H₂O SO₂

CO₂ H₂O SO₃

Rigid rocky crust earth upto a depth of 100 km is called:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Polumerization process was classified by

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W.H. Garold

William Hackel

W.H. Carothers

H. Carothers

When a nitrogeneous base combine with a sugar it is called

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Ribose

Nucleotides

Nucleoside

None

The common name of propanoic acid is

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Acetic acid

Formic acid

Propionic acid

Butyric acid

Phosphate pollution is caused by

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Weathering of phosphate rocks only

Agricultural fertilizers

Phosphate rocks and sewage

Sewage and agricultural fertilizers

Macromolecules or polymers are large molecules built up from small molecules called monomers. This hypothesis put forward by

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Schrodixger

Standinger

Lewis

Newton

Of the following which is a step growth polymer

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Bakelite

Polyethylene

Teflon

PVC

Which of the following will have the highest boiling point at 1 atm pressure?

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0.1 M NaCl

0.1 M Sucrose

0.1 M BaCl₂

0.1 M Glucose

Ozone hole refers to

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Hole in ozone layers

Reduction in thickness of ozone layer in stratosphere

Reduction of thickness of ozone in troposphere

Increase concentration of ozone

Dilatometer method is useful for the reaction that involve :

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Small volume changes in solutions

Change in infractive indices

Where reactants absorb U.V, visible or infrared radiation

The electron releasing effect of methyl group is significant and it makes ring a good

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Electrophilic

Nucleophilic

Nucleophobic

Hydrophobic

A pollutant affects

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Human health

Quality of life

Functioning of ecosystem

All of these

Which is made by coordinate covalent bond

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H₃O⁺

H₂O

CH₄

HCl

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