Question # 1

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

H2SO4 acts as gent

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Reducing

Oxidizing

Both A and B

None of above

In each period the most electro negative element belongs to.

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^{Group -1}

Group -17

Group -2

Group -18

Aluminum occurs in nature as.

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Native

Combined form

Both native and combined

Free

Nitric acid is used in the manufacturing of.

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Dyes

Drugs

Artificial silk

All above

The most electronegative element of the third period is.

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F

P

Br

Cl

Ionic bond are also forces called as.

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Polar bond

Electrovalent bond

None polar bond

Both A and B

Elements in which differentiating electron enters the (n-1) the d-orbitals of the (n-1) the main shell are called elements.

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s- block

p-block

d-block

f-block

Al Cl3 is used in

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Manufacturing of petrol

In borax bead test

Prezervation of food

All above

Which of tetra chloride is resistant to hydrolysis.

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CCl4

SiCl4

GeCl4

SnCl4

Duralumin is an alloy of.

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Mg + AI

Ai+ Mg+Mn

Mg + Ai + Cu

Mg + Ai + Cu + Mn

Xe reacts directly with

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O2

Cl2

F2

Br2

Bases and reducing agents are electron giving agents and also called as.

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Electrodotic

Electrophile

Nucleophile

None of above

Greenish yellow gas with pungent irritating odour

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Chlorine

Fluorine

Iodine

Bromine

The strongest acid is.

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HNO2

HNO3

H2N2O2

HNOS

In a period, the element with biggest electron affinity belong to.

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Group 1

Group 2

Group 17

Group 18

Zero group elements are called as

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Inert gases

Rare gases

Noble gases

All of above

The penultimate shells have pscudo inert gas type configuration.

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Ga

In

TI

All above

Inert pair effect is best shown by

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Si

Z

Sn

Pb

The wire of flash bulb is made up of.

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Cu

Ag

Mg

Ba

Sodium reacts with excess of oxygen to form

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Na2O

NaO2

Na2O2

NaO

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