Question # 1

The core of the earth is mostly made from ____________

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Nickel

Iron

A % B

Copper

The earth is made up of ____________ % of aluminum.

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6

7

8

9

A binary solution consists of:

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One component

Two components

Three components

Many components

Neuron was discovered by

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Sir Willium Crooks

Goldstein

James Chadwik

Neil Bohr

Water dissolves ____________ compound.

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Ionic

Polar covalent

A & B

Nil

If the solute-solute forces are strong enough than those of solute- solvent force, The solute:

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dissolves readily

does not dissolve

dissolve slowly

dissolves and precipitates

Formation of water form hydrogen and oxygen is:

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Redox reaction

Acid-base reaction

Neutralization

Decomposition

Alpha particles are double charged.

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Negative

Positive

Can be both

Nil

Which one of the following non-metal is lustrous?

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Sulphur

Phosphorus

Iodine

Carbon

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

Metals from a ____________ part of earth on which we live.

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Smaller

Larger

Medium

Nil

A group of gases that maintains temperature of atmosphere is.

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Carbon dioxide and water vapours

Nitrogen and carbon dioxide

Thermosphere

Troposphere

The bond angle between H-O-H in water is:

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104.5^o

104.6^o

104.7^o

104.8^o

Which one is the simplest sugar which can not be hydrolyzed?

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Glucose

Sucrose

Starch

Cellulose

Which organ cause to function during Jaundice?

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Liver

Kindney

Stomach

Large intestine.

|Which one is not an Arrhenius acid?

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HCl

H2SO₄

CO₂

HNO₃

Imperial chemical industries was established in.

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1942

1944

1950

1990

The process by which water rises up from the roots of plants to leaves is called.

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Photosynthesis

Respiration

Surface tension

Capillary action

Eggs oils and fats contain vitamin .

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A

B

C

D

Chemical formula of chloroform.

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CH₃Cl

CH₂O₂

CHCl₂

CCl₄

Which disease causes bone and tooth damage?

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Fluorosis

Hepatits

Cholera

Jaundice

Chemical formula of matte will:

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Cu2S.FeS

Cu2S

Cu2O

FeS

Gas equation is derived by combining

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Avogadro's and Charles's Law

Boyle's and Charles's Law

Avogadro's and Boyle's Law

Avogadro's, Boyle's and Charles's Law

18 g of glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to

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1/5

5.1

1/51

6

NH3 shows a maximum boiling point among the hydrides of V-A group elements due to.

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Very small size of nitrogen

Lone pair of electron present on nitrogen

enhanced electronegative character of nitrogen

Pyramidal structure of NH3

The law of mass action was given by

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D.C. down and P wage

Gay Lussic and C.M

C.M Goldberg and P. Waage

Hendeson and Le Chateller's

Which technique is used ot determine the absorption of radiations.

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Spectrometry

dilatometer method

Refractometric method

Optical rotation method

Colligative properties are used to determine the

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Freezing points

Boiling point

Atomic mass of an element

Molar mass of solute

When solid KI dissolved in water, its heat of solution is positive. What would happen to dissolution when temperature is increased.

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Increases

Decreases

Remain same

Firs increases than decreases

Which substance have delta E = Delta H and no pressure - volume work.

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Liquids only

Solids only

Gases only

Liquids and solids

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

A chemical change always involve

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Absorption of heat

Evolution of heat

Either absorption or evolution of heat

The liberation of heat and light energy

Azeotropic mixture

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Obey Raoult's law

Do not obey Raoult's law

Boils at low temperature only

Boils at high temperature only

Role of H2S in the given chemical reaction is H2S + I2--------------- 2HI+S

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Oxidising agent

Reducing agent

Dehydrating agent

As an acid

The degree of unsaturation of fat is measured by

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Iodine number

Oxidation number

Reduction number

Saponification value

Which one of the following complexes is chelate.

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Potassium hexacyanoferrate (II)

Diammine silver (I) Chloride

Tetracarbonylnikel (0)

Sodium dioxalatoplatinate (II)

Laughing gas is chemically

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NO

NO₂

N₂O

N₄O₄

In Down's cell anode is made up of.

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Iron

Copper

Graphite

Platinum

Bleaching powder may be produced by passing chlorine over

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calcium carbonate

hydrated calcium sulphate

calcium hydroxide

magnesium hydroxide

Which substances is called chrome yellow.

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Pb3O4

PbO

2PbCO3.Pb(OH)2

PbCrO4

The most electronegative element of group V-A is

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N

P

Sb

Bi

The catalytic oxidation of methane produces

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CO + H₂O

CO₂+ H₂O

C₂+ H₂O

H₃C - OH

Conversion of phenol to benzene is known as.

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Oxidation

Reduction

Hydrolysis

Hydration

Half mass of atmosphere gases is present in.

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5-6 km distance above the surface of earth

10 km above the surface

100 km above the surface

56 km above the surface