Question # 1

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Q and R Q and R

R only Q and R

Q and R R only

Q only R only

Which of the following will be good conductor of electricity

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Pure distilled water

Molten NaCl

Dilute solution of glucose

Chloroform

Electronegativity values of the elements F, CI and Br vary

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F > CI > Br

Br > CI > F

Cl > Br > F

CI > F > Br

The prosthetic group in glycoprotein is

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Carbohydrate

Fat

Vitamin

Nucleic acid

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N₂O₄is limiting reactant

N₂H₄is the limiting reactant

Reactants are completely converted to the products

Reactions is reversible

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

Which is not a component of environment

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Biosphere

Lithospahre

Hydrosphere

None of these

Maximum number of active hydrogens are present in

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Acetic acid

Glycerol

Methane

Methanol

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

Ethyl alcohol may be identified by

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Ring test

Iodoform test

Tollen's test

Bazeyer's test

Number of moles of the solute dissolved per dm³of the solution is knows as

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Molarity

Formality

%age

None of these

A bond between two atoms may be obtained by sharing of electrons such a bond is called

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An ionic bond

A coordinate bond

A dative bond

A covalent bond

1, 3-Dibromopropane reacts with metallic zinc to form

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Propene

Propane

Cyclopropane

Hexane

The electron in an atom

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moves randomly around the nucleus

has fixed space around the nucleus

is stationary in various energy levels

moves around its nucleus in definite energy levels

Which of the following is not isoelectronic?

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Na⁺

Mg²⁺

O^2-

Cl^-

The amino group in 19α-amino acids is primary; only oneα-amino acid has secondary amino group which one is that

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Alanine

Glutamic acid

Glycine

Proline

If acetyl chloride is reducing in the presence of BaSO₄and Pd, then

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CH₃CHO is formed

CH₃CH₂OH is formed

CH₃COOH is formed

CH₃COCH₃is formed

Ionic radius, in a period from left to right

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Increases

Decreases

Decreases then increases

Increases and decreases

The element with atomic number 55 belongs to which block of the periodic table

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s-block

p-block

d-block

f-block

A common industrial solvent is a mixture of propanone; CH₃COCH₃, and pentyl ethanoate CH₃CO₂(CH₂)₄CH₃. Which reagent would have no effect on this solvent

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Na_(s)

NaBH₄

NaOH_(aq)

2,4-dinitrophenylhydrazine reagent

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

General formula of aromatic carboxyl acids

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R---------------OH

RCOOH

RCOR

ARCOOH

Which step is unnecessary for purification of water for drinking purposes

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Aeration

Coagulation

Treatment with chlorine

Treatment with iodine

The major reaction occurring in the engines of automobiles is

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Oxidation

Reducing

Combustion

Decomposition

The condition for standard enthalpy change is

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1 atm 30°C

1 atm 50°C

1 atm 25°C

760 atm 25°C

Amino acids are bifunctional organic compounds what are the two function groups

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Carboxylic acid and alcohol

Alcohol and aldehyde

Carboxylic acids and ketone

Amino group and carboxylic acid

Gammexane is

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Chlorobenzene

Benzyl chloride

Brommobenzene

Benzene hexachloride

Chloroflurocarbon releases a chemical harmful to ozone

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Fluorine

Chlorine

Nitrogen peroxide

Sulphure dioxdie

The acid present in vinegar is

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CH₃COOH

HCI

H₂SO₄

HCOOH

Direct conversion of solid intro vapours is called:

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Crystallization

Sublimation

Obligation

Vapourization

Acid rains are produced by

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Excess NO₂and SO₂from burining fossil fuels

Excess production of NH₃by industry and coal gas

Excess release of carbon monoxide by incomplete combustion

Excess formation of CO₂by combustion and animal respiration

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