Question # 1

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

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polymer

macromolecule

micromolecule

a & b

Which factor is helping to reduce the environment pollution

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rapid growth population

urbanization

idustrialization

increase of plantation

Protein of high biological value

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Contains essential amino acids

Is poor in essential amino acids

Is of plant source

Contains amino acid glycine e. Is a basic protein

Which of the following is primary alkyl halide

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IsopropyI halide

Sec-butyl halide

Tert-buryi halide

Neo-pentyl halide

A single chloride free radical can destroy the ozone molecules

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100

100000

10000

10

Photochemical smog contains----as main reactants

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Nitrous oxide & unburnt hydrocarbons

NO & brunt hydrocarbons

Nitric oxide & unburnt hydrocarbons

N2O & burnt hydrocarbons

Cl₂is a gas while iodine is a solid due to

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stronger London forces with high polarizability

greater electro negativity of Cl than iodine

stronger dipole dipole forces

iodine is colored while chlorine is colourless

Which one of the following is used as coagulant for purification potable water

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Copper sulphate

Alum

Barium sulphate

Nickel sulphate

Amount of ozone in atmosphere is expressed in units:

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Kilograms

cm

molarity

DU

Which one of the following equations represents the 1st ionization energy of Na?

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Na(s) ---->Na⁺ (g) + e^-

Na(g) --->Na⁺ (g) + e^-

Na(s) --->Na⁺ (s) + e^-

Na (s) + e^- ---> Na⁺ (g)

lonization of KCIO3. is suppressed by

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Increasing temperatuse

adding KCl

adding NaNO3

Decreasing temperature

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99.2%

99.5%

90.5%

96.2%

Which are used as essences (flowers)?

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Aldehydes

Ketones

Alcohols

Esters

Which compound shows more hydrogen bonding?

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C₂H₆

C₂H₅Cl

CH₃----O----CH₃

C₂H₅OH

When during electrolysis of a solution of AgNO₃, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be

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1.08 g

10.8 g

21.6 g

108 g

In the manufacture of NH₃by Haber's process catalyst used is iron its catalytic efficiency is poisoned by

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Presence of Al₂O₃

Presence of Cr₂O₃

MnO₂

CO present with H₂gas

When an alcohol reacts with SOCI₂an alkyl halide is formed. What are two other products

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SO₂and HCI

SI₂and H₂O

HCI and H₂O

H₂S and HCI

Coupling of Pb with its Pb⁺⁺/Pb = -0.13 V and Ag with Ag⁺/ Ag = +0.80 V, the cell reaction

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Saturated solution of NaCl on heating becomes

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Super saturated

Unsaturated

Remains saturated

None

Which of the following factors will favour the reverse reaction in a chemical equilibrium?

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Increase in concentration of one of the reactants

Increase in concentration of one of the products

Removal of one of the products regularly

None of these

BiCl₃on hydrolysis forms a white precipitate of

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Bismuthio acid

Bismuth oxychloride

Bismuth pentachloride

Bismuth hydroxide

The degree of polarity of molecule is known as its

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Dipole moment

Moment arm

Bond energy

Ionic character

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