Question # 1

Which one of the followings is resistant to oxidation under normal conditions

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Methyl alcohol

Acetaldehyde

Ethyl alcohol

Acetone

Ph of unpolluted rain water is

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07

Less than 6

5.6

Less than 5

Iodine number of an oil indicates its:

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molecular weight

purity

degree of unsaturation

acidic strength

Lithosphere has amount of silicon

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35.30%

27.72%

40.01%

21.13%

The potential difference set up at 25 C and 1 atm when clectrode is dipped m Tis one molar ionic sohution is called

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Single electrode potential

electrode potential

Standard electrode potential

Standard hydrogen electrode

A fibre which is made from acrylonitrile as monomer

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PVC

rayon fibre

acrylic fibre

polyester fibre

Sugar crystals belong to the system

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cubic

monoclinic

triclinic

orthorhombic

Which of the statement is applicable for both ideal and real gases molecules?

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Have no forces of attraction

Collisions between the molecules is elastic

Molecules are in random movement

The actual volume of gas is negligible as compared to the volume of gas

Which of the following gives positive haloform test and positive Fehling solution

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Acetone

Echanol

Acetaldehyde

Formaldehyde

Lead pollution is mainly due to

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Metallic pollution

Space pollution

Acid rain

Cd pollution

The pressure exerted by gas molecules is due to their

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collisions

densities

masses

kinetic energy

Alkyl benzenes are readily oxidized by axidfied

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KMnO₄

K₂CO₃

MnO₄

H₂SO₄

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

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0

+1

+2

-1

Which of the following species has unpaired electrons in antibonding molecular orbitals

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Enzymes are

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Proteins

Minerals

Oils

Fatty acids

Proton was discovered by:

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Chadwick

J.J. Rhomson

Millikan.

Goldstein.

A homogeneous mixture of two or more than two chemical substances is called

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Solute

Solution

Solvent

Salvation

Cyclone collector is used for minimizing

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Radioactive pollution

Air pollution

Noise pollution

Water pollution

Phosphorus helps the growth of

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Root

Leave

Stem

Seed

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

Each vertical column of the periodic table includes elements with chemical characteristics that are in general

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Identical

Similar

Different

Similar as well as different

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

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