Question # 1

Which does not affect vapour pressure

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Nature of liquid

intermolecular forces

Temp

None of these

Which one is monosacharide?

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starch

glucose

maltose

sucrose

Aluminium is in Group lll, its oxide will have the formula.

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AlO

AlO₂

Al₂O₃

Al₃O₂

A basic buffer solution can be prepared by mixing?

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Weak acid and its salt with strong base

Weak base and its salt with strong acid

Strong acid and its salt with weak base

Strong base and its salt with strong acid

Which one is very weak acid

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HF

HCI

H2CO3

H2O

The bond angle between any two sp hybrid orbitals is A.109.28°

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107.09°

120°

90°

80°

Which of these polymers is a synthetic polymer

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Starch

Animal fat

Polyester in an addition polymer

Cellulose

Allotropic forms of carbon are:

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five

three

four

two

Plastics are a pollution problem because many plastics:

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Are made from petroleum

Are very inflammable

Burn to produce toxic fumes

Decompose to produce toxic products

What is not true for NH4CI

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It has ionic bond

It has covalent bond

It has coordinate bond

It has hydrogen bond

The incineration may reduce volume of wastes upto:

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1/4th

1/2nd

2/3rd

3/4th

Which of the following molecules has unpaired electrons in anti-bonding molecular orbitals?

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O₂

N₂

Br₂

F₂

The rate of reaction :

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Decreases as the reaction proceeds

Increases as the reaction proceeds

May decrease or increase reaction proceeds

Remains same as the reaction proceeds

DNA has deoxyribose, a base and the third component is

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Phosphoric acid

Ribose

Adenine

Thymine

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

Hydrocarbons contain

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C and S only

C and H only

C, H, and O only

C, H, O and N only

f-Block elements are also called

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Non typical transition elements

Outer transition elements

Normal transition elements

Inner transition elements

The colour of ppts formed by Fehling's test is

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Brick red

Red

Yellow

Orange

Detergents are

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Synthetic products

Natural products

Both (a) and (b)

None of these

Phosphide ion has the electronic structure similar to that of

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Nitride ion

Fluoride ion

Sodium ion

Chloride ion

In azeotropic mixture showing negative deviation form Raoult's law show

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Higher b.p. than either

Lower b.p. than either

No change in b.p.

None of these

Photochemical smog is caused by

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CO

CO₂

O₃

NO₂

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