Question # 1

In urea the amount of nitrogen is

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82.0%

46.0%

33.0%

21.0%

Sulphate ores of aluminium

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Alumite

Cryolite

Fekdsper

Kaolin

The acetylene molecule contain a

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Single bond

Double bond

Triple bond

Co ordinate bond

The process in which ore is heated generally in the presence of air, at temperature below their melting points is called.

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Calcination

Roasting

Fourth floatation

besemerization

Which of the following is not a property of Ni.

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it is a soft silvery white metal

It is malleable and ductile

It is highly magnetic

It has high electrical and thermal conductivities

Argon is used in filling of.

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Discharge tubes

Luminous tube

Fluorescent tubes

None of above

Formula of orthophosphoric acid

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H2PO4

H3PO2

H2P2O5

Which of the following elements has the highest ionization energy.

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Na

Si

Ar

Cl

Pi bond is formed

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By the overlapping of atomic orbitals on internuclear axis

By transference of electrons

By sidewise overlapping to half filled p orbitals

By overlapping of s-orbitals with p orbitals

The correct order of ionic radii for the following ions is.

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S²- < P^3- < Cl- < K+

Cl- > S2+ > P3- > k+

K+ > Cr > S2+ > P3-

P3+ > S2 > Cl - > K+

The number of electrons involved in bonding in Lewis structure of oxalate ion is

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20

14

22

18

Aque regia is made by dissolving a mixture of HNO3 and HCl with ratio.

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1 : 1

1 : 3

1 : 2

1 :10

Which of the following is the correct order of interactions.

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Covalent < hydrogen bonding < Van Der Waal's < dipole -dipole

Van der Waal's < hydrogen bonding < dipole -dipole < covalent

Van der Waal's < dipole -dipole < hydrogen bonding < covalent

Dipole-dipole < Van der Waal's < hydrogen bonding < covalent

The most convenient and has nearest approach to a universal pH measurement

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pH strips

pH indicator

The emf method

The colorimetric

After assimilation urea leaves behind in the soil

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NH3

CO2

Both A and B

None of above

The ionization energy of N is more than that of oxygen becasue.

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Nitrogen has half filled p orbitals

Nitrogen atom is smaller in size than oxygen atom

Nitrogen contains less number of electrons

Nitrogen is less electronegative

CFT was originally applied to.

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Ionic crystal

Liquid crystal

Solid crystal

All above

What is the following is incorrect.

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Water is more polar than H2S

H2O2 is a planar molecule

Heavy water is produced by the exhauative electrolysis of water made acidic

H2O2 act both as oxidising as well as reducing agent in acidic medium

Aluminum occurs in nature as.

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Native

Combined form

Both native and combined

Free

Which of the following exists as polymeric chains in solid state.

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Sr Cl2

Ba Cl2

MgCl2

BeCl2

"Acids are substance whose aqueous solutions turned blue litmus red and tasted sour" stated by

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Davy

Liebig

Boyle

Rouelle

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