Question # 1

Number of H+ ions when 0.1 mole of sulfuric acid is completely ionized in water

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4x6.022x10ê23

1×6.022x10ê23

2x6.022 x10ê23

2x6.022x10ê22

Which of the following polymer has application in paper industry

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Starch

Glycogen

Protein

All

Tertiary alcohols are the easiest to dehydrate because

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They form stable carbocation

They have less hydrogen

They have bigger size

They are polar

What is the formula of talc or soapstone?

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Na2B4O7.10H2O

H2Mg3(SiO3)4

Cu2S

NaNO3

Which molecule is least ionic"

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NaCI

HCL

HF

CsF

The buffering property of proteins is due to the presence of

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Acidic and basic group

Hydrogen bonds

Indole group

Hyrophobic

Which of the following test is not given by aldehvde

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2. 4 DNPH test

NaHSO3 test

Tollen's test

Sodium nitroprusside test

An electron with drawing group attached to e-position in phenol

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makes it basic

Stabilises the phenoxide ion

decreases its basicity

allows it to precipitate in aqueous solution

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

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Atmosphere

Lithosphere

Hydrosphere

Biosphere

Which is the most toxic among the given?

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heavy metals

non-metals

Metals

Metalloids

Nucleic acid contain elements like N,H,O,C and

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Ca

S

P

F

Benzene does not undergo

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Substitution reaction

Addition reaction

Oxidation reaction

Elimination reaction

Which one of the following is an ideal solution that obeys Rault's law

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Ethanol + water

Benzene + toluene

HCI + water

Acetone + chloroform

Which one of the following compounds does not have the empirical formula CH₂O?

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Ethanoic acid, CH₃CO₂H

Ethanol, CH₃CH₂OH

Glucose, C₆H₁₂O₆

Methanal, HCHO

Alpha rays consist of:

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Neutrons.

Helium nucleus.

Protons.

Hydrogen nucleus.

A food chemist wants to create the odour of pineapples for a product. An ester with this odour has the formula C₃H₇COOC₂H_5.Which pair of reagents would produce this ester

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C₂H₅CI and C₃H₇COOH

C₂H₅OH and C₃H₇CONH₂

C₂H₅OH and C₃H₇COOH

C₃H₇OH and C₂H₅COCI

Buffers having pH less than 7 are made

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Mixture of weak acid + salt of it with strong base

Mixture of weak acid + salt of it with weak base

Mixture of weak base + salt of it with strong acid

Mixture of weak base + salt of it with weak base

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

Which of the following elements is not stable:

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Xe

Ar.

Kr.

Li.

Reaction of ethanes with KMnO₄gives:

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Ozonide

Glyoxal

Glycol

Oxalic acid

A compound having empirical formula C₃H₃O and its molecular mass is 110.02. Its molecular formula is

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C₃H₃O

C₆H₆O₂

C₉H₉O₃

C₃H₆O₂

Any other aldehyde except formaldehyde on reaction with Grignard's will produce

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Secondary alcohol

Primary alcohol

Tertiary alcohol

Aromatic alcohol

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