Question # 1

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

Alumina is not used as

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Refractory material

A medium in chromatography

An abrasive

A White pigment

The principal ores of copper are

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Copper sulphides

Copper oxides

Both sulphides and oxides

Copper carbonate

The state of hybridization of Xe in Xe F6 are

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sp2

sp3

sp3 d

dsp3

In the Lewis structure of H2SO4 molecule the total number of unshared electrons in valence shell of various atoms is.

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8

16

12

20

The correct increasing order of bond dissociation energy for N2, O2, F2 and Cl2 is

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N2 < O2 < F2 < Cl2

F2 < Cl2 < O2 < N2

F2 < Cl2 < N2 < O2

N2 < Cl2 < F2 < O2

Which of the following statements correct regarding copper.

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It is used in electroplating

Its salts are used as insecticides

Its salts are used as coloring materials

All are correct

Of the following the commonly used n the laboratory desiccator is.

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Anhyd. Na2Co3

Anhyd Ca Cl2

Dry NaCl

None of the above

Inert pair effect is best shown by

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Si

Z

Sn

Pb

A trend which is common to elements of both the group IA and group VII A ongoing from top to bottom.

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Boiling point increases

Electron affinity increases

Oxidizing power increases

Ionization energy decrease

In vinyl cyanide, the number of a bonds in

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2

3

1

4

Drying agent which react with CO2 and removes water vapours is.

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CaO

CaCl2

CaCO3

Ca(NO3)2

The electronic configuration of some elements are given below. The element with highest electron affinity is

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1s2, 2s2, 2p3

1s2, 2s2, 2p4

1s2, 2s2, 2p5

1s2, 2s2, 2p6

CFT was originally applied to.

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Ionic crystal

Liquid crystal

Solid crystal

All above

Type of hybrid orbitals used by the chlroine atom in CIO2 is.

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sp2

sp3

sp

None of these

The _________ sphere is enclosed in brackets in formulas for complex species, and it includes the central metal ion plus the coordinated group

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Ligand

Donor

Coordination

Oxiation

The secondary valency of Conc. CoCl3. 6NH3.

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2

4

6

8

Types of carides

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Ionic carides

Covalent carbides

Interstitial carbides

All above

Ionic bond are also forces called as.

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Polar bond

Electrovalent bond

None polar bond

Both A and B

The dipole moments of the given species are such that.

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BF3 > NF3 > NH3

NF3 > BF3 > NH3

NHE > NF3 >BF3

NH3 > BF3 > NF3

HCIO4, HNO3 and HCL are all strong acids in aqueous solution inglacial acetic acid medium, their acid strength is such that.

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HCIO4 > HCL > HNO3

HNO3 > HCIO4 > HCl

HCl > HCIO4 > HNO3

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