Question # 1

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Small change in concentration of product

Small time internal

Co-efficient of the reactant

Co-efficient of the product

A limiting reactant is one which according to the stoichiometric equation

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Has excess mass

Has least mass

Has excess number of moles

Has least number of moles

A ring contains 3 gram diamond. The number of C-atoms which a ring contains is

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3.01 x 10²³

1.5 x 10²³

6.02 x 10²⁴

3.01 x 10²⁴

Natural fertilizers are materials derived from

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Plants only

Animals only

Both plants and animals

None of these

Which one of the following is a product of the reaction between C₆H₅CH₂OH and CH₃COCI

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C₆H₅OCOCH₃

C₆H₅CH₂CI

C₆H₅CH₂OCOCH₃

C₆H₅CH₂COCI

Hypo is used in photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

The geometry of acetylene is

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Angular

Bent

Trigonal

Linear

The sum of mole percent of all the components of solution is always equal to :

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Less than 100

One

100

10

Which of the following synthetic fertilizer do not make soil acidic

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Urea

Thin urea

Ammonium phosphate

Potassium nitrate

When propanamide reacts with Br₂and NaOH then which of the following compounds is formed?

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Ethyl alcohol

Propyl alcohol

Propyl amine

Ethylamine

The comparative rates at which the solutes move in paper chromatography, depend on:

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the size of per sued.

R_f values of solutes

temperature of the experiment

size of the chromatography tank used.

Which is used for the reduction of aldehydes and ketones

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NaBH₄

Pt/Pd

Ni

All of these

Which of the following has polar bond

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O₂

N₂

HCl

Cl₂

DDT is formed from

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Benzene and Chlorobenzene

Chloral and Chlorobenzene

Chloral and Benzene

Chlorobenzene and chlorine

Which of the following has unchanged valency?

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H

Na

Fe

Oxygen

Under what condition of temperature and pressure the formation of atomic hydrogen from molecular hydrogen will be favourd

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High temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

:Low temperature and high pressure

Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H₂gas when treated with acids because

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These have very high positive values of reduction potentials

These have very high negative values of reduction potentials

Their ionization potentials are lowest

Their reduction potentials are close to SHE

(A) is one molar NaCl solution and (b) is 1 molal NaCl solutin :

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A and B are of same strength.

A is more Concentrate than B.

b is more Concentrate than A.

None of above.

What is the cause of water pollution

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Chemical and bacterial contents in live stock

The spilled oil in rivers and ponds

Wide spread use of pesticides

All of the above

Hydrolysis of trichloromethane with aqueous KOH gives

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Potassium formate

Acetylene

Chloral

Methanol

The wave length of electron as wave is 0.5 nm. What is the wave length in meter

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5 x 10^-9

5 x 10^-12

5 x 10^-6

5 x 10^-10

The acid present in vinegar is

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CH₃COOH

HCI

H₂SO₄

HCOOH

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Acidic amino acid

Basic amino acid

Neutral amino acid

None of these

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With H₂/Ni CH₃(CH₂)₅CH₂OH

With H₂/Ni CH₃(CH₂)₅CH₃

With NaBH₄ CH₃(CH₂)₅CH₂OH

With NaBH₄ CH₃(CH₂)₅CHO

10 ml of 1.5 M NaOH solution is neutralized by 20 ml of a-M HCl solution. The value of 'a' will be

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1.0

0.75

0.5

0.25

Methyl alcohol is not used:

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As a solvent

As an anti-freezing agent

As a subsitution for petrol

For denating of ethyle alcohal

Ketons are prepared by the oxidation of

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

Nitroalkane are used in

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Fuel

Solvents

Organic synthesis

All of them

Ethyl alcohol prepared during fermentation is pure:

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20%

10%

11%

12%

The positive ion is always smaller than the neutral atom while the negative ion is always bigger than the neutral atom. The atomic and ionic radii of Na, F, Na⁺, F^-are in ppm

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Na F Na⁺ F^-

157 72 95 136

Na F Na⁺ F^-

157 95 172 136

Na F Na⁺ F^-

72 95 136 157

Na F Na⁺ F^-

157 136 95 72

Mass of simple electron is:

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9.1 x 10^-31 kg

9.1 x 10^-30 kg

1.66 x 10^-31 kg

9.1 x 10^-31 kg

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