Question # 1

The periodic table consist of ________________ columns.

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Periods

Rows

Column

Nil

1 atm = ?

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1 pascal

760 mm of Hg

1 atm

1 Nm^-2

In ________________ Bohr considered hydrogen atom for his model .

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1913

1916

1917

1918

The vapour pressure of a liquid increase with the:

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increase pressure

increase of temperature

increase of intermolecular forces

increase of polarity of molecules

The third abundant as found in the earth' crust is:

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Carbon monoxide

Oxygen

Nitrogen

Argon

Tyndall effect is due to:

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block of beam of light

non - scattering of beam of light

scattering of beam of light

passing through beam of light

Which one of the following does not affect the boiling point?

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intermolecular forces

external pressure

nature of liquid

initial temperature of liquid

When temperature of water drops to ____________ °C it convert onto ice.

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0

-2

-1

1

The no. of Ion pair/pairs in ammonia molecule is / are

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1

2

3

4

1 torr = ?

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1 mm of Hg

1 atm

760 mm of Hg

1 pascal

Cu + 2AgNO3 -------> Cu(NO3) +2Ag. In this reaction reducing agent is:

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Cu

AgNO3

Cu(NO3)2

Ag

Basic solution have pH value.

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Less than 7

Greater than 7

equal to 7

None of these

The salts of which element are present in detergent that causes the rapid growth of algae in water bodies is.

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Phosphate

Calcium

Sodium

All of them

The color of hydrogen Iodide is:

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Colourless

Black

Red

Pink

Stearic acid present in

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Apple

Fats

Urine

Grapes

Which salt is used for the manufacture of detergents, pulp and paper?

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NaCl

Na₂CO₃

Na₂SiO₃

NaCl

Boiling point of water is:

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0^oC

25^oC

80^oC

100^oC

How trace amount of acetylene present in the coat gas.

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0.06%

0.07%

0.08%

0.09%

Which of the following is a poisonous gas.

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Oxygen

Ozone

Nitrogen

Carbon dioxide

Guldberg and waage out forward law of mass action in:

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1889

1879

1869

1859

Brown hair contains.

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Iron compound

Copper compound

titanium compound

Both a and b

In irreversible reaction, dynamic equilibrium:

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Never establishes

Establishes before the completion of reaction

Establishes after the completion of reaction

Establishes readily

In H2SO4the oxidation number of 'S' is

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+2

+6

+8

+4

Which substance is nto a dehydrating agent.

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CaCl3

CdCl2

Silica gel

P2O5

The pH of 10^-3mol dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

Ionic bond is formed by combination of groups

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IA and VIII

II A and VII A

IV A and VA

VIA and VII A

The shape of diamond crystal is.

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cubic

Hexagonal

Tetragonal

Orthorhombic

Which one of the following gases diffuse more rapidly.

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Cl2

CO2

CH4

N2

Rate of a chemical reaction generally increase rapidly even for small increase in temperature because of rapid increase in the

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Collisions frequency

Activation energy

Average KE of molecules

Fraction of molecules with energies more than activation energy

A gas is heated in such a way that its volume and absolute temperature both are doubled. the pressure of the gas

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Becomes 2 times

Becomes 4 times

Become half

Remain same

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

Diamond is bad conductor because.

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It has a tight structure

It has a high density

It is transparent to light

There are o free electros present in the crystal of diamond to conduct electricity.

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

Structure of carbonyl is

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Tetrahedral

Linear

Octahederal

Trigonal planar

The word paper is derived from the name of which reedy plant

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Rose

Sun flower

Papyrus

Water Hyacinth

The nature of lysine amino acid is

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Acidic

Basic

Amphoteric

Natural

Laughing gas is chemically

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NO

NO₂

N₂O

N₄O₄

Which is not polymer

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Diamond

Starch

Sand

Nucleotide

The number of peptide bonds in dipeptide is

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0

1

2

3

Which of the following compounds is used to make spray, which has fungicidal action.

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BaSO4

Na2CO3

CaO

CaSO4.2H2O

Which reaction is disproportionate reaction

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Aldol Condensation

Cannizzaros's reaction

Haloform reactions

Acid Catalyzed reactions

Boiling point range of petroleum ether.

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5- 20 ^oC

10- 30^oC

20- 60^oC

30- 90^oC

Flavour of ethyl butyrate is

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Orange

Pine apple

Banana

Apricot

The aromatic ring of Benzene can be hydrogenated in the presenc eof.

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Pt

Rh

Sunlight

O3