Question # 1

The no. of electrons in the valence shell of alkali metals is

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1

2

4

7

Which one of the following shell consists of three subshells?

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K- shell

M-Shell

L-shell

M-shell

___________ is used in treatment of cancer.

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Cobalt-60

C-12

H-3

Nil

The component of solution in larger amounts is ____________

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Solute

Solvent

a & b

Nil

The study of hydrocarbons and their derived compounds is called

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Physical chemistry

Inorganic chemistry

Organic chemistry

Biochemistry

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

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Long form

Simplified

Simplest

Nil

The core of the earth is mostly made from ____________

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Nickel

Iron

A % B

Copper

NaOH is prepared by ____________ of NaCL (aqueous).

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Electrolysis

Decomposition

A & B

Nil

Which has biger particles?

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Solutions

Colloids

Suspensions

True solutions

The no.of neutrons in deutrium is

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1

2

3

4

The isotopes C-12 is present in abundance of:

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96.6%

97.6%

99.7%

None of these

Which pollutant is responsible for changing weather?

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Air pollutant

Water pollutant

Soil pollutant

All of them

Rapid growth of algae in water bodies in because of detergent having.

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Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

Vitamin B₁ (Thiamin) was discovered by.

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Hopkins

Funk

J.Watson

Davy

The recombination of O and O₂ in mid stratosphere is an

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Exothermic reaction

Endothermic reaction

Heat absorbing process

None of these

The reduction of alkyl halides takes place in the presence of

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Zn/HCl

Na/HCl

Mg/HCl

Cu/HCl

Oxidation of Ethene with KMnO₄ produces.

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Oxalic acid

Glyoxal

Ethene Glycol

Propene glycol

Which process is responsible for ascending of water in roots:

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evaporation

transpiration

condensation

capillary action

Which disease cause when humans use water of industrial effuents.

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Cancer

Asthma

Jaundica

Cholera

The branch of chemistry which deals with the study of hydrocarbons and their derivatives is known as.

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Organic chemistry

Inorganic chemistry

Biochemistry

Nuclear chemistry

Alkyl radical is derivative of

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Alkane

Alkene

Alkyne

All

The carbon contents in lignite is.

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80%

50%

60%

70%

The number of Na, ions which surround each CI^1-ion the NaCI crystal lattice is

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8

12

6

4

Relative lowering of vapour pressure is equl to.

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Mole fraction of solute

Mole fraction of solvent

Molarity

Molality

Which one of the following substances is not sublime material.

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Iodine

Benzoic acid

Ammonium chloride

Potash alum

The enthalpy of combustion is

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Positive

Negative

Either positive or negative

No correlation

The mathematical relation between the rate of reaction and the concentrations of the reactants is known as the

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Rate equation

Rate law

Arrhenius equation

Both a and b

Which substances has diffused melting point.

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Crystalline solids

Amorphous solids

Metallic solids

Covalent solids

The highest temperature above which a gas cannot be liquified, no matter how much the pressure is applied is known as

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Boiling temperature

Consulate temperature

Absolute zero

Critical temperature

During paper chromatography, the stationary phase is.

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Solid

Liquid

Gas

Plasma

The molecule having zero dipole moment is.

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NH3

CHCl3

H2O

BF3

Splitting of spectral lines when atoms are subjected to magnetic field is called.

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Stark effect

Zeeman effect

Photoelectric effect

Compton effect

The rate of reaction

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Increase as the reaction proceeds

Decreases as the reaction proceeds

Remains the same as the reactions proceeds

May decrease or increase as the reaction proceeds

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

Which of the following is not a fatty acid

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Ecosystem is smaller unit of

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Lithosphere

Hydroshpere

Amosphere

Biosphere

In ethene molecule, the number of atoms which are present in the same plane are.

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2

6

3

4

Di ethyl ether can be converted to alcohol by heating with.

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HI

NaOH

Water

KMnO4

Which one of the following liberates CO2 from an aqueous solution of NaHCO3.

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Acetic acid

Ethyl alcohol

Phenol

Acetyl chloride

In t-butyl alcohol, the tertiary carbon is bonded

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Three hydrogen atoms

Two hydrogen atoms

One hydrogen atom

No hydrogen atom

In [Co(NH3)6]+3 the coordination number of cobalt is.

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Zero

Two

Four

Six

The ore CaSO4.2H2O has the general name.

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Gypsum

dolomite

Calcite

Epsom salt

Electron affinity is measure of energy

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Required to remover the electron

Released by adding an electron

Required to excite an electron

Released by removing an electron

Ortho boric acid on strong beating gives.

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Borax

Boron oxide

Metaboric acid

Tetraboric acid