Question # 1

According to CFT the metal ligand bond is considered to be ionic to presentage.

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100%

90%

50%

70%

The Ostwald process is the main method for the manufacture of nitric Acid in the fist step in this process is.

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Nitrogen and hydrogen react to form NH3

Ammonia is burned in O2 to generate N2 and H2O

Nitrogen and oxygen react to form NO2

Ammonia is burned with O2 to generate NO and H2O

The bond formed by complete transfer of electrons from electropositive to more electronegative atom is called.

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Ionic bond

Covalent bond

Mettalic bond

Co ordinates bond

A stable molecule is a group of atoms held together by

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Chemical forces

Physical forces

Valence force

None of above

At high temperature nitrogen combines with calcium carbide to give

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Calcium cyanide

Calcium cyanamide

Calcium nitride

Calcium cabonate

The contact process is mainly used when acid is required for the manufactures of.

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Explosives

Fine chemicals

Lead accumulators

All above

Solid sodium chloride does not conduct electricity be cause.

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In solid NaCl, no ions are present

Solid NaCl is covalent in nature

In solid NaCl, there is no mobility of ions

In solid NaCl, there are no electrons.

According to the VSEPR theory, the shape of the SO3 molecule is.

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Pyramidal

Tetrahedral

Trigonal planar

Distorted totrahedron

Which among the following is a false statement.

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SiO2 has a structure similar to that of CO2

Natural Si exists only in the combined state

Si can be prepared by reducing SiO2 with Mg

Si does not exist in graphite like structure, but exists only ni diamond like structure.

Example of inter molecular H-bonding is

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NH3 and H2O

HF

CH3COOH

All of abvoe

The electron gain enthalpy of chlorine is -349 Kj mol-1 ionization energy of Cl would be.

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-349 kJ mol -1

349 kJ mol-1

-698 kJ mol-1

698 kJ mol-1

Which one of the following statements regarding BF3 is not correct.

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It is an ionic compound

It is an electron deficient compound

It is a Lewis acid

It forms adducts

In the Aluminothermite process, aluminium acts as.

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An oxidizing agent

A reducing agent

A flux

A Solder

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

The commonly used catalyst in the manufacture of H2SO4

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Fe2O3 with a little CuO

v2O5

Platinized asbestos and MgSO4

All above

The electronegativity of the following elements increases in the order.

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C,N, Si, P

N, Si, C,P

Si, P, C, N

P, Si, N, C

CFSE for d⁷ ion is.

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0.8

-0.8

-1.8

1.8

A covalent bond which is formed between two atoms by the overlap of atomic orbitals along their axis is called.

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Pi bond

Sigma bond

Polar bond

Non polar bond

The unequal sharing of bonded pair of electrons between the two atoms in a molecule causes.

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Dipole

Radical formation

Decomposition of found

Covalent found

Which of the following species has highest bond energy.

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H2

T2

D

Cl

Boric acid is added to glass because is.

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Makes the glass opalescent

Reduces the coefficient of expansion

Makes the glass brittle

Increase refractive index of the glass.

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