Question # 1

Mobility is property of ____________

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Liquid

Gases

A & b

Nil

The solubility of which salt increases in heating?

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Li₂SO₄

Ce₂(SO₄)₃

NaCI

KCI

Which one is the following belongs no Noble Gases?

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O

F

Ne

Nil

Which molecule has single covalent bond?

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O₂

N₂

CI₂

CO₂

Industrial chemistry deals with the manufacturing of compounds:

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in the laboratory

on micro scale

on commercial scale

on economic scale

The 2nd and third periods are called

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short period

Normal period

Long period

Very long period

105 elements were discovered by the year ________________

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1984

1974

1086

1996

The periodic table consist of ________________ columns.

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Periods

Rows

Column

Nil

In the redox reaction between zn and HCI. the oxidizing agent is:

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zn

H⁺

C

H²

Which one of the following solution contains more water?

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2M

IM

0.5M

0.25M

Octet rule is:

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description of eight electrons

picture of electronic configuration

covalent bonding

attaining of eight electrons

The number of carbon atoms present in fuel oil.

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14-18

15-18

16-18

17-18

Infrared radiation emitted by the earth are absorbed by?

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CO₂,H₂O

N₂,O₂

CO₂,N₂

O₂,CO₂

Which organ cause to function during Jaundice?

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Liver

Kindney

Stomach

Large intestine.

Petroleum is refined by:

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destructive distillation

fractional distillation

simple distillation

dry distillation

Which one of the following is not air pollutant.

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CO₂

CO

NO₂

O₂

Alkanes are least reactive compounds because they are.

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Saturated hydrocarbons.

Unsaturated hydrocarbons.

Both a and b

None of the above.

The percentage of sun light absorbed by atmospheric gases is.

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2%

10%

18%

25%

Cause of diarrhoea among following is:

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Diarrhea

Cholera

Cryptosporidium

Typhoid

The removal of Mg⁺² and Ca⁺² Ion which are responsible for the hardness of water is called.

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Temporary hardness

Permanent hardness

Water softening

Hydrogen bonding

Which of following is not amphoteric?

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H₂O

NH₃

HCO₃

SO₄

Water dissolves Non-ionic compounds by:

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Ion-Ion forces

Dipole forces

Dipole - Dipole forces

Hydrogen Bonding

How many molecules of CO2 are formed by burning 12 g carbon with excess of oxygen.

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3.01 x 10²³

1 x 10²³

6.02 x 10²³

1.03x 10²³

Quantum number values for 2p orbitals are

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n = 2, l = 1

n =1, 1 = 2

n =1, l = 0

n = 2, l = 0

In which system all the three axes are of equal length and all angles are at right angle.

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Cubic

Tetragonal

Orthorhombic

Hexagonal

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

Quantum number values for 2p orbitals are.

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n = 2, 1 =1

n =1, 1 = 2

n =1, 1= 0

n = 2, 1 = 0

At equilibrium stage of chemical reaction

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The concentration of reaction is equal to concentration of products

The rate constant of forward reaction is equal to rate constant of backward reaction

The rate of forward reaction is equal rate of backward reaction

The energy of activation of forward step is equal to energy of activation of backward step

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dm⁺⁶mole^-2

mole²dm^-6

Mole dm^-3

Having no units

Velocity constant is the rate of reaction when the concentrations of reactants are

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Zero

Unity

Two

Three

Sum of pKa and pKb is equal to.

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1

7

0

14

A limiting reactant is that one which

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Gives greatest number of moles of products

Gives least number of moles of products

Is left behind after the completion of reaction

Is mostly a cheaper substance as compared to other reactants

In Daniel cell, if salt bridge is removed between the two half cells, the voltage.

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Drops to zero

Does not changes

Increases gradually

Increases rapidly

The conversation of n-hexane into benzene by heating in in the presence of Pt is called

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Isomerization

Aromatization

Dealkylation

Rearrangement

Predict the product or reaction.

Acetaldehyde +NaOH

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An aldol

Acetic acid

Ethanol

Paraldehyde

The basis of modern periodic table is

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Electron affinity

Atomic mass

Ionization Potential

Atomic number

The general formula for Alkanes is

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C_nH_2n+1

C_nH_2n

C_nH_2n-2

C_nH_2n+2

Which one of the following is not use of chlorine.

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Formation PVC

Formation of mustard gas

Disinfectant and bleaching agent

Formation of sodium chloride

The reactivity of Grignard's regent is due to

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Polarity of Mg-x bond

Polarity of C-Mg bond

Electro negativity of halogen atom

Presence of Mg-atom

In which substance phosphorus is not present.

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Yolk of egg

Bones

Apatite

Galena

Which furnace is used to prepared steel

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Blast furnace

Pudding furnace

Bessemer converter

Pyrite furnace

Which one of the following gases is used welding purpose usualy.

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Methane

Ethane

Ethene

Acetylene

Ethanol can be converted into ethanoic acid by

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Hydrogenation

Hydration

Oxidation

Fermentation

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