Question # 1

The types of solutions on the basis of their physical states are

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3

6

9

12

At ____________ °C water converts to ice.

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101°

100°

99°C

100.2°C

In peroxides, the oxidation no. of O is

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+1

-1

+3

-3

Transfer of electrons between atoms results in:

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metallic bonding

ionic bonding

covalent bonding

coordinate covalent bonding

Increase in ________________ increase evaporation.

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Temperature

Stronger

All

None of above

Transition elements are:

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all gases

all metals

all non-metals

all metalloids

Metals lose their electrons easily because:

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They are electronegative

They have electron affinity

They are electropositive

Good conductors of heat

The forces of attraction present between the molecules of a substance are called ____________ forces.

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Intermolecular forces

Covalent

Ionic

Nil

Amadeo Avogadro was a _______________ scientist.

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Italian

English

Greek

Russian

The other name of modern periodic table is ________________ of periodic table.

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Long form

Simplified

Simplest

Nil

Gases have ____________ shape.

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Fixed

Not Fixed

Nil

Both a & b

The layer above troposphere extend upto 50 kilometers called.

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Mesosphere

Hydrosphere

Stratosphere

Thermosphere

Dehalogenation of Tetrahalides takes place in the presence of .

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K

Mg

Na

Zn dust

Which are called paraffines?

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Alkyle

Alkynes

Alkenes

Alkanes

Which one of the following is not a greenhouse Effect?

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Increasing atmosphere temperature.

Increasing food chains

increasing flood risks

Increasing sea-level

Blast furnace usually used for the metallurgy of.

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Iron

Copper

Aluminum

Both a and b

On which bases froth floatation process take place?

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Density bases

Concentration basis

Watting basis

None of these

Coal tar contains compounds

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Benzene

Phenol

Toluene

All

Chemical formula for urea is:

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NH4CNO

NH4CH

NH2CONH2

NH4CI

The freezing point of water is:

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10 ^oC

100^oC

0^oC

46^oC

The number of carbon atoms present in petroleum ether.

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1-5

2-5

3-7

5-7

The nitrogen present in urea is used by plants to synthesize.

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Sugar

Proteins

Fats

DNA

The real gas obeying Van der Waal's equation will resemble ideal gas is.

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both 'a' and 'b' are large

both 'a' and 'b' and small

'a' is small and 'b' is large

'a' is large and 'b' is small

According to classical concept, oxidation involves

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Addition of oxygen

Addition of electron

Removal of hydrogen

All are correct

An atomic orbital has l =1 , m =+1, 0, -1, n = 3 than which one of the following atomic orbital has such values.

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2s

2p

3p

3d

In endothermic reactions, the heat content of the.

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Products is more than that of reactants.

Reactants is more than that of products

Both a and b

Reactants and products are equal

Which particle have greater wave nature.

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Electron

Proton

Neutron

a particles

Which one of the following correctly describe the shape of NH3 molecules.

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tetrahedral

Pyramidal

Angular

Square planar

The pH of 10-3 mole dm-3 of an aqueous solution of H2SO4 is.

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3.0

2.7

2.0

1.5

How should the conditions be changed to prevent the volume of a give gas from expanding when its mass is increased.

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Temperature is lowered and pressure is increased.

Temperature is increased and pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

Which has greater enthalpy of vaporization

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F2

Cl2

Br2

I2

Buffer action can be explained by

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Common ion effect

Law of mass action

Le Chateller's principle

All above

Which one of the following orbital will be filled first.

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4f

5d

3d

4s

Which one of the following proteins transports oxygen in blood stream.

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Insulin

Albumin

Hemoglobin

Globulin

Which one of the following enzyme is used for the treatment of blood cancer in children.

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Thrombin

Asparaginase

Glucokinase

Fumarase

Ketones are prepared by the oxidation of.

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

SN2 mechanism involves

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1st order kinetic

2nd order kinetic

3rd order kinetic

Zero order kinetic

Mark the correct statement.

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Na+ is smaller than Na atom

Na+ is large than Na atom

Cl- is smaller than Cl atom

cl- and Cl are equal in size

The brown gas formed, when metal reduce HNO₃

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NO

NO₂

N₂O₃

N₂O₅

Which of the following sulphates is not soluble in water.

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium Sulphate

Catalyst used to reduce carboxylic acid to alcohol is

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H₂/ Ni

H₂/ pt

NaBH₄

LiAIH₄

Which substance reacts with sodium nitroprusside.

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Ethanol

Acetaldehyde

Dimethyl ketone

Methanol

Which substance is water repellant and used in ceramic insulators.

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Asbestos

Lead compounds

Silicon carbide

silicones

The oxidation of NO in air produces

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N₂O₃

NO₂

N₂O₃

N₂O₄