Question # 1

Number of electronsin nitrogen molecule is.

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2

4

6

8

Following are state of matter.

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Liquid

Solid

Gas

All of these

Whcih one of the following in as electron deficient molecule.

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NH3

O2

BF3

N2

The structure of C atom in diamond is.

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Pentagonal

Triangle

Hexahedral

Tetrahedral

Which branch of chemistry give information about starch syntehsis in plants?

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Biochimstry

Organic chemistry

Environmental chemistry

Inorganic Chemistry

All transition elements belong to

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s and p block

d- block

f-block

d and f block

Caustic chemical drain cleaner are captable of dissolving.

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Hair

Food

Grease

All of these

Silicon belongs to Grou IVA . It has ....electons in the valence shell

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2

6

3

4

When an electronegative element combines with electrpositive element, the type of bonding. is.

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Covalent

Polar Covalent

Ionic

Coorinae Covalent

How many lone pairs are present on nitogenin ammonia molecule.

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One

Two

Three

Four

M shell has sub sheels.

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1s , 2s

1s,2s,3s

2s,2p

3s,3p,3d

Which of the following is a poisonous gas.

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Oxygen

Ozone

Nitrogen

Carbon dioxide

The bond in the product of lewis acid base reaction.

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Ionic

Covalent

Metallic

Coordinate covalent

Which of the following is a secondary pollutant.

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CO₂

CO

SO₃

HF

Atmosphere has regions.

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One

Two

Three

Four

Which one of the following species is not amphoteric?

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H₂O

NH₃

HCO₃

SO₄

The strong heating of coal in the absence of air is called.

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Carbonization

Destructive distillation

Fractional distillation

All

General formula of alcohols is:

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RCHO

ROH

O= R - C -OH

O = R - C- R

According to Bronsted and Lowry concept an acid is a substance that can donate.

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Proton

Electron pair

Neutron

Electron

Arrhenius put forward acid base concept in.

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1878

1786

1787

1790

A complete reaction is one is which.

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All the reactants convert into products.

All the reactants do not convert into products.

Half reactants convert into products.

Only 10% reactants convert into products.

Major portion of ozone layer is foun in.

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Troposphere

Stratosphere

Mesosphere

Thermosphere

The pressure of oxygen inside the bomb calorimeter is.

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100 atm

50 atm

25 atm

20 atm

Which pair of mixture is called ideal solution.

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Chlorobenzene and bromobenzene

Water alcohol

Water ether

HCl and water

Which of the following can form H-bonds

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NH₃

C₂H₆

NaCI

CHCI₃

Which of the following solution s has the highest boiling point.

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5.85% solution of sodium chloride

18.0 % solution of glucose

6.0% solution of urea

All have the same boiling point

One of the following substances does not undergo sublimation

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KMnO₄

Naphthalene

NH₄CI

Iodine

How many moles of CO are present having 12.04 x 10²³molecules of CO2.

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0.5 mol

1.0 mol

1,5 mol

2.0 mol

The Van der Waals' equation explain the behaviour of.

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Ideal gas

Real gas

Vapours

Non ideal gases

Standard enthalpy of combustion of carbon is -394 kJ mol-1 than, which is the standard enthalpy of formation of CO2

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+394 kJ

-394 kJ

0 kJ

+197 kJ

the nature of the positive rays depend on

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The nature of the electrrode

The nature of the discharge tube

The nature of the residual gas

All of the above

Acetone and chloroform are soluble in each other due to

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Intermolecualr hydrogen bonding

Dipole-dipole interaction

Instantaneous dipoles

All of the above

The substance used for decolorization of crystalline substance is

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G2O5

Chloroform

Animal charcoal

Soda ash

Out of the elements of group VIA the highest melting and boiling points is shown by the element.

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Te

Se

S

Po

Synthetic rubber is made by polymerization of.

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Chloroform

Acetylene

Divinylactylene

Chloroprene

Phenol on heating with concentrated nitric acid forms

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o-nitrophenol

T.N.T

Na2CO3

Cyclohexanol

Which of the following is a typical transition metal.

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Sc

Y

Ra

CO

Which one of the following is a compound protein or conjugate protein.

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Legumin

Albumin

Collagen

Phosphoprotein

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

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fibre

plastic

varnish

polyamide resin

Which alkyl halide does not form Grignard's reagent.

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CH3-Br

CH3-Cl

CH3- F

CH3-I

Primary, Secondary and tertiary alcohols can be distinguish by.

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Iodoform test

Lucas test

Fehling solution

Ammoniacal silver nitrates

Catalyst used in thermal cracking

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Platinum

Nichel

Al2O3 and SiO2

Fe2O3 and CuO

Which element has lowest melting point

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Beryllium

Magnesium

Calcium

Barium

When ethyl bromide is heated with Ag2O the product formed is.

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Ethanol

Ethene

Ethanol

Di ethyl ether