Question # 1

The fibre which is obtained from naturally occurring proteins is called

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Saran

Azlon

Rayon

Nylon

The alkaline earth elements have in their s-orbital

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One electron

Two electron

No electron

Three electron

According to Mendeleev, the properties of the elements are periodic function of their

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Atomic number

Atomic volumes

Atomic masses

Atomic densities

The color of Cr³⁺ion is

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Violet

Blue

Pink

Green

Phosphorous helps the growth of

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Root

Leave

Stem

Seed

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

The theory of chemical bonding has been a major problem of:

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Modern Physics.

Modern Chemistry.

Modern Biology.

Mechanics.

Calcium acetate when dry distilled gives

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Formaldehyde

Acetaldehyde

Acetone

Acetic anhydride

The other name for distribution law is

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Dispersive law

Partition law

Avogadro's law

separation law

A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is

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46

78

110

180

In lead accumulator the electrolyte is H₂SO₄solution is

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30% H₂SO₄

60% H₂SO₄

80% H₂SO₄

90% H₂SO₄

The number of groups in the periodic table is

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6

7

8

9

Oxalic acid oxidizes to:

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CO

CO₂

Oxalates

None of these

With amino acids ninhydrin solution gives

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Blue

Violet

Bluish violet

White

Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same

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Empirical formula

Number of atoms in a molecules

Number of isomers

Relative molecular mass

The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product

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CH₃CH(OH)COOH

CH₃CH₂CH(OH)COOH

(CH₃)₂C(OH)COOH

CH₃CH₂CH₂COOH

Essential amino acids are those amino acids which

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Body can not synthesize

Body can synthesize

α-amino acids

β-amino acids

When a metal is dipped in 1 molar of its solution at 298 K. then potential set up is called

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Standard electrode potential

Electric charge

Ionization potential

Electroplating

Amides on treatment with Br₂and KOH are converted into amines, the reaction is known as

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Hoffmann's bromamide reaction

Hoffmann's methylation

Gabriel phthalimide reaction

H.V.Z reaction

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

A smuggler could not carry gold by chemically depositing iron on the gold surface since

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Gold is denser

Iron rusts

Gold has higher reduction potential then iron

Gold has lower reduction potential then iron

Ethyl bromide is formed by the reaction of HBr with

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Ethane

Ethene

Ethyne

Propane

Given date

(i) heat of neutralization of HCl and NaOH is -57.3 KJ mole^-1

(ii) heat of neutralization of CH₃COOH with NaOH is 55.2 KJ mole^-1

The enthalpy of ionization of CH₃COOH is a determined according to Hess's law by

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Adding i and ii

Dividing i by ii

Subtracting i from ii

Subtracting ii from i

Benzene is obtained from benzene sulphonic acid by treating with

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HCl

NaOH

H₂O

NaHCO₃

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First order

Pseudo first order

Second order

Zero order

d-block elements are also called :

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alkali metal

Alkaline earth metals

Transition elements

Electron deficient elements

f-Block elements are also called

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Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

Gammexane is

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Chlorobenzene

Benzyl chloride

Brommobenzene

Benzene hexachloride

Which of the following does not give iodoform test?

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Ethanol

Ethanal

Acetophenone

Bezophenone

Which of the following ion has the highest value of ionic radius?

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Li⁺

F^-

O^2-

B³⁺

Due to the bacterial action on wood it is converted into

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Peat

Lignite

Bituminous coal

Anthracite

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