Question # 1

Which one of the following is not an electrolytic cell:

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Down cell

Galvanic cell

Nelson' cell

Both a and c

Es is symbol of :

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Erbium

Einsteinium

Europium

Fremium

Suspension's solute particles ____________ at bottom.

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Dissolves

Settle

Both

Nil

_________ is an example of substance.

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Carbon

Hydrogrn

Oxygen

Water

_________ which occupies space and have mass.

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Matter

Atom

Molecule

All of above

The elements of group 3 to 12 are called

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Normal elements

Transition elements

Radioactive elements

None of these

The bond in covalent compound is ________________

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Covalent

Ionic

Dative

Couple

Films are coated by special chemical known as ____________ detectors.

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Photographic

Image

Nil

Both

Which of following does not belong to p-block?

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IIIA

IVA

VA

VIB

Mark the incorrect statement about ionization energy:

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it is measured in Kjmol^-1

it is absorption of energy

it decreases in period

it decreases in a group

One atmospheric pressure is equal to how many pascals?

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101325

10325

106075

10523

Which ion cause water hardness?

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Al²

Mg²

Fe²

Na²

The base which is used in alkaline batteries is.

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NaOH

Al(OH)₂

KOH

Mg(OH)₂

The layer above troposphere extend upto 50 kilometers called.

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Mesosphere

Hydrosphere

Stratosphere

Thermosphere

The process of removing temporary hardness of water.

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Clark's method

Washing soda method

Sodium zeolite

Filteration method

Condensed formula of ethane is.

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C₃H₈

C₂H_2n+2

C₂H_2n-2

C_nH_2n+1

Which one of the following does not contain starch

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Sugar cane

Maize

Barley

Potatoes

Aromatic compounds are given this name because of;

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smell they have

slippery touch they have

bitter taste they have

sour taste they have

Which help to keep the bowel functioning property

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Dietary fiber

Vitamins

Lipids

Carbohydrates

Atmosphere has regions.

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One

Two

Three

Four

Guldberg and waage put forward law of mass action in:

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1860

1869

1870

1879

When the reaction causes to produced it is called.

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Chemical equlibrium state

Static equilibrium

Dynamic equilibriiun

All

Which acid has less value of pKa.

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CH3COOH

H2S

H2CO3

HCl

If uncertainty position of an electron is zero, the uncertainty in its momentum would be

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Zero

Infinite

Both a and b

None of these

The effect of temperature on equilibrium was studied by

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Lewis

Van der wall

Arrhenius

Vant hoff

Bohr's model of atom, is contradicted by.

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Planck quantum theory

Pauli's exclusion prinsciple

Heisenberg's uncertainty principle

All of the above

Which properties of liquid is measured by polarimeter

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Conductance

Refractive index

Optical activity

Change in volume

Relative lowering of vapour pressure is equl to.

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Mole fraction of solute

Mole fraction of solvent

Molarity

Molality

Keeping the temperature constant of the gas is expanded.

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Pressure will decrease

Temperature will increase

Kinetic energy of molecules will increase

No. of gas molecules increases

the rate of reaction when concentration of reactants are taken unity is called.

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Average rate

Instantaneous rate

Specific rate

Rate equation

Conduction of electricity through gases under reduced pressure is due to the transportation of.

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positive charge

Negative charge

Both types of charges

None of these

Which one of the following substances is not sublime material.

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Iodine

Benzoic acid

Ammonium chloride

Potash alum

Unit of mole fraction is

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mol dm-3

mol kg-1

g dm-3

No unit

Which of the following is not a fatty acid

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Aluminum oxide is

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acidic oxide

basic oxide

amphoteric oxide

none of these

Which substance is used to convert alcohol to alkyl halide.

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SOCl2

PCl3

HCl +ZnCl2

All of these

Preparation of vegetable ghee involves.

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Halogenation

Hydrogenation

Hydroxylation

Dehydrogenation

To product aldehyde group against alkaline oxidizing agent.

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It is reduced in the presence of catalyst

An acetal is formed

It is oxidized

It is treated with aqueous NaBH4

f-block elements are also called

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non typical transition elements

outer transition elements

normal transition elements

inner transition elements

The element of 2nd period, which has highest ionization energy from the following is

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Be

C

N

O

The gas used in bactericidal lamps is

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Be

Ar

Kr

Xe

During manufacturing of cement , the temperature of pre heating zone is.

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500 ^oC

900^oC

1000^oC

1500^oC

Which acid can not be stored in glass bottles.

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HCl

HF

H2SO4

HNO3

Ethanol on dehydration can be changed to

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Ethene

Diethyl ether

Both 'a' and 'b'

None of these