Question # 1

Compounds formed when noble gasses get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called.

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Interstitial compounds

Hydrates

Clathrates

Picrates

Considering the elements B, Al, Mg and K , the correct order of their metallic character is.

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B > Al > Mg > K

Al > Mg > B > K

Mg > Al > K > B

K > Mg > Al > B

The first ionization energy of Mg is lower than

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Na

Ca

Al

Be

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

Nitric acid is used in manufacturing of.

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Explosive

H2SO4

Fertilizer

All above

Consider to violet colored compund.[Cr(OH)2)6 Cl3 and the yellow compound. [Cr(NH3)6]C;2 which of the following statements is false.

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Both chromium metal ions are paramagnetic with 3 unpaired electrons.

[Cr(NH3)6)3+ is calculated directly form the energy of yellow light

For [Cr(OH)2)6]3+ is less than for [Cr(NH3)6]3+

The two complexes absorb their complementary colors.

Which of the following iso electronic spices has the highest IE.

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Ne

Na+

F

O2-

The most electronegative and the most electromotive elements of the first period is

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H and He

Na and Cl

Li and F

H and He

The coordination number of closely packed hexagonal is.

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4

6

8

12

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

Among the elements A, B,C and D having atomic numbers 7,8,9 AND 12 Respectively, the element with smallest size and highest IE is.

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A

B

C

D

The first ionization energy in electron volts of nitrogen and oxygen atoms are respectively given by.

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14.6, 13.6

13.6, 14.6

13.6, 13.6

14.6, 14.6

The different layers in graphite are held together by

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Ionic bonding

Metallic bonding

Covalent bonding

Van der Waals forces

In the Lewis formula of which of the following species, the number of single double and dative bonds are equal.

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N2O3

HNO3

SO2

SOCl2

Carbides because of their hardness are

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Ionic carbides

Interstitial carbides

covalent carbides

Any of above

The unit of sodium chloride structure is.

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Linear

Cubic

Tetrahedral

Square planner

Black and white photographic film contain small grains of.

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Silver bromide

Silver cholride

Silver iodide

Any of above

The value of Kw increase with temperature because the ionization of water.

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Positive

Negative

Endothermic

Exothermic

An sp3 hybrid orbital contains

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1/4 a character

1/2 a character

2/3 a character

3/4 a character

All the halogen form oxyacide, except

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Florine

Chlorine

Bromine

Iodine

Which of the following is not an ore of Cr.

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Chrome iron

Nicollite

Crocisite

Chrome ochre

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