Question # 1

A crystal system in which all three angles and all three edges are different is called

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triclinic

rhombohedral

cubic

hexagonal

Acetone and Chloroform are soluble in each other due to

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intermolecular hydrogen bonding

ion-dipole interaction

instantaneous dipoles

dipole-induced dipole interaction

Formula of stearic acid is:

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C₁₁H₂₃COOH

C₁₃H₂₇COOH

C₁₅H₃₁COOH

C₁₇H₃₅COOH

The value of R is SI units is

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0.0821 dm³. atm. J^-1mole^-1

62.4 dm³torr K^-1mole^-1

8.31 dm³atm. K^-1mole^-1

8.31 JK^-1mole^-1

At what temperature, would N₂molecules have the same average speed as He-molecules at 300 k?

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1100 K

2100 K

420 K

None

When wine is put in air, it becomes sour due to

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Oxidation of C2H5OH

Formation of C2H5NH2

Reduction of C2H5OH

Dissolution of CO2

Which of the following bonds is not present in NH4CL

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lonic bond

Covalent bond

Co-ordinate covalent bond

De-localized covalent bond

Kinetic energy of one mole of an ideal gas at 300 K in kJ is

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34.8

3.48

3.74

348

Slight oxidation of primary alcohol eives

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Ketone

Aldehyde

-Organic acid

An ester

In esterification, the OH of carboxylic acid is replaced by

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OR+

R+

OR

R

The height of the peak in the mass spectrum shows

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Number of isotopes

Relative abundance

Mass number

Number of protons

The oxidation number of each element of group l-A is

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0

+1

+2

-1

The chloroform reacts with NaOH to give

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CH₃COONa

Sodium oxalate

CH₃OH

HCOONa

Who rejected the vital force theory

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Wholer

Fisher

Newton

Lewis

Zwitter ion is ______ ion an amino acid

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Polar

Monopular

Dipolar

Non polar

Maximum variable oxidation state is of:

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Mn⁺²

Fe⁺³

Cr⁺¹

a and b

Camphor is often used in molecular mass determination because

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It is solvent for organic substances

It is readily available

It has a very high cryoscopic constant

It is volatile

Grignard's reagent on treatment with chloramine give

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Acetamide

Primary amice

Secondary amice

Urea

The number of moles of NH₄CI dissolved in 500 cm³of its 15%, W/N solution is

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1 mole

1.4 mole

2.0 mole

2.4 mole

1, 3-Dibromopropane reacts with metallic zinc to form

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Propene

Propane

Cyclopropane

Hexane

The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is

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Mg < K < Na < Rb

Mg < Na < K < Rb

Mg < Na < Rb < K

Na < K < Rb < Mg

The unit rate of constan K ismole^-1 dm³S^-1for a chemical reaction, the order of reaction is :

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3

2

1

0

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