Question # 1

In the Aluminothermite process, aluminium acts as.

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An oxidizing agent

A reducing agent

A flux

A Solder

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

Among group IA elements, melting point

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Increases down the group

Decreases down the group

Do not show any regular trend

Remains constant

Which of the following halogen exist in solid state.

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F2

I2

Cl2

Br2

Which of the group 13 element does not form M (III) idodie.

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Al

Ga

Ti

In

Atomic volume of C, N, O and F are in the order

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C > N > F > O

C > N > O > F

F > O > N >C

N > C > O >F

The unit of sodium chloride structure is.

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Linear

Cubic

Tetrahedral

Square planner

Which of the following is the second anciently known metal.

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Nickel

Copper

Gold

Silver

The most reactive alkali metal among the following is

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Li

Na

Cs

Rb

The boiling point of water is unexpectedly high because.

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H2O molecule in linear

Sp3 hydrogen bonding is involved in the formation of water

There is hydrogen bonding and consequent association of H2O molecules.

Oxygen is the first member of the VI group

When orthoboric acid is heated strongly it gives.

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B2O3

H2B3O7

HBO2

B

Which of the following represents the correct order of ionic radii

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La+ < Na+ < K+ < Rb+

Li+ > Na + > K+ >Rb+

Li = Na + = K+ = Rb+

Rb +> Na+> K+ > Li+

Which of the following element has six electrons in the valance shell but cannot exhibit a maximum co valency of six.

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Sulpher

Oxygen

Salenium

Both A and B

Most electronegative element is.

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C

Si

Pb

Sn

The energy gap between tag and eg sets in denoted by

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A-

10 Dq

Both A and B

None of above

pKa value of hyponitrous acid is.

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-7.0

8.9

4.1

6.6

The major role of Flurospar which is added in small quantities in the electrolytic reduction alumina dissolved in fused cryolite is.

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As a catalyst

To make the fused mixture very conducting

To lower the temperature of the melt

To decreases the rate of oxidation of carbon at the anode

Formula of orthophosphoric acid.

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H2PO4

H3PO3

H3PO2

H4P2O5

The metallic character of group 14 elements

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Decreases from top to bottom

Increases from top to bottom

Does not change gradully

Has no significance

Sodium metal cannot be stored under

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Hexane

Benzene

Kerosene

Ethanol

The size of iso electronic species - F- , Ne, and Na+ is affected by

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Nuclear charge (Z)

Valence principal quantum number (n)

Electron electron interaction in the outer orbital

None of the factors because their size to the same.

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