Question # 1

The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.2965 V at 25°C. The equilibrium constant of the reaction would be

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1.0 x 10¹⁰

2.0 x 10¹¹

4.0 x 10¹²

1.0 x 10²

Two elements whose electronegativities are 1.2 and 3.0, the formed between them would be

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Ionic

Covalent

Coordinate

Metallic

In an electrolytic cell, the electrons flow from :

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Cathode to anode or opposite

Cathode to anode

Anode to cathode

Random flow

What element is not essential the growth of plants and is not required in the fertilizers

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Nitrogen

Potassium

Phosphorus

Barium

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

The number of unpaired electrons in ferrous ion ( Z - 26) is

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3

2

4

5

Which of the following has ester linkage?

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Nylon

Bakelite

Terylene

PVC

Heat of neutralization of weak acid and a strong base is

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13.7 Kcal

Less than 13.7 Kcal

Greater than 13.7 Kcal

None of these

The catalytic prmoter used for the industrial preparation of acetaldehyde is

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PdCI₂

CuCI₂

Pd + CaCI₂

None of these

Essentialα-amino acids are those which are necessary in the diet

Which one is an essentialα-amino acids

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Alanine

Aspartic acid

Glycine

Tryptophan

Schrodinger wave equation describes electron completely because

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It describes a set of four quantum number

It describes the particle nature of electron

It measures wavelength of electron

It describes electron moving in specific orbit

Coal heated in the absence of air of about 500 - 1000°C is converted to

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Coke

Coal gas

Coal tar

All above

The number of spherical nodes in 3p orbitals are

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One

Three

Non

Two

Equal volumes of 0.1 M AgNO₃and 0.2 M NaCl are mixed. The concentration of NO^-₃ions in the mixture will be

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0.1 M

0.05 M

0.2 M

0.15 M

The freezing mixture used in ice cream machine consists of ice and

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NaCI

KCI

MgCI₂

NaNO₃

The carbon, carbon bond length in benzene is

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1.54A°

1.34A°

1.20A°

1.39A°

Carboxyl group has functional group in it:

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One

Two

Three

Four

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

When CO₂is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

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Propane

Propanoic acid

Propanal

Propanol

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

Which substances haveΔH =ΔE

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Solids

Liquids

Gases

Liquids and solids

The spectrum of He is expected to be similar to that of

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H

Na

He⁺

Li⁺

Natural fertilizers are materials derived from

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Plants only

Animals only

Both plants and animals

None of these

Their e/m, ratio resembles with that of electrons

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Alpha rays

Beta rays

Gamma rays

X-rays

The volume of 0.1 M H₂SO₄required to neutralize completely 40 ml of 0.2 M NaOH solution is

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10 ml

40 ml

20 ml

50 ml

The amount of Si in the lithosphere is about

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27.72%

30.35%

35.30%

40.21%

Smallest charge of electricity that has been measured so far is

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Charge on a-rays

Charge on electron (1.602 x 10^-19C)

Charge on x-rays

Charge on gamma rays

Simple sugars are :

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Monosaccharides

Disaccharides

Oligo saccharides

Trisaccharides

When acetamide reacts with Br₂and caustic soda, then we get

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Acetic acid

Bromoacetic acid

Methyl amine

Ethylamine

Which one of the following equations represent the reaction that occurs when calcium nitrate is heated strongly

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Acetal is produced by reacting alcohol in the presence of dry HCl with

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Acetaldehyde

Ketone

Ether

Carboxylic acid

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