Question # 1

Zinc reacts with dilute acids to liberate hydrogen. This is because:

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Zn2+ ion is a powertul osidising agent than H' ion

H+ ion is a powerful oxidising agent than Zn ion

Zn2+ ion is a powerful reducing agent than H' ion

H+' ion is a powerful reducing agent than Zn- ian

The word paper is derived form the name of which reedy plant:

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rose

sun flower

papyrus

water hyacinth

Substituted phenyl group are called

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Arene groups

Alkyl groups

Aryl groups

Acyl groups

An example of neutral amino acid is

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Gylcine

Lysine

Aspartic acid

Glutamic acid

Dipole-dipole interaction are present in the

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atoms of the He gas

molecules of CCl4

molecules of solid iodine

molecules of :NH3

When stress is applied to the metals, the metals are malleable and ductile because

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their layers slip pass each other

atoms lose electrons

mobility of electrons increased

none of the above

The element which is not present in all proteins is

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C

H

O

S

The disposal of domestic refuse, commercial and industrial solid wastes are studied under the title

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Solid waste management

Waste management

Solid management

Semisolid management

The aliphatic compounds are of two types

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Straight chain and cyclic

Branched chain and alicyclic

Straight chain and branched

Homocyclic and alicyclic

Keratin is

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Protein of tendons

Rich in sulfur

Poor in cysteine

Conjugated protein

Which one of the following is a water soluble vitamin?

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niacin

riboflavin

tyrosine

ascorbic acid

Benzene is obtained by fractional distillation of

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Heavy oil

Anthracene oil

Middle oil

Light oil

The shape of CIO^-₃according to valence shell electron pair repulsion theory will be

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Planar triangle

Pyramidal

Tetrahedral

Square planar

The oxide of beryllium is

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Acidic

Amphoteric

Superoxide

Basic

General formula of aromatic carboxyl acids

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R---------------OH

RCOOH

RCOR

ARCOOH

Sodium forms largely

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Normal oxides

Per-oxides

Superoxides

None of these

The element with atomic number 26 will be found in group

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2

8

6

10

Which reaction is example of nucleophilic substitution

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Which of the following synthetic phosphorous fertilizers is marked as super phosphate

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Calcium dihydrogen phosphate

Appetite

Calcium phosphate

Wavellite

Pb has inert pair of electrons:

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One

Two

Three

Four

Pollution is

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Removal of top soill

Release of toxic/undesirable materials in enevironment

Conversation of energy

All the above

SnCI₂have ______ shape

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Planner

Tetrahedral

Angular

None

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