Question # 1

The geometry of Xe F2 is

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Triangular planar

Square planar

Linear

Trigonal bipyramidal

Which of the following elements would have the lowest first ionization energy

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Mg

Rb

Li

Ca

Which one of the following has the biggest electron affinity.

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F2

Cl2

Br2

I2

Which of the following elements of group 15 is a typical metal.

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P

As

Bi

Sb

PCl5 is an example of hybridization

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d sp³

d2 sp2

sp2

sp3

Bryllium salts on hydrolysis give.

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Basic solutions

Acidic solutions

Neutral solutions

Amphoteric solutions.

Four elements A, B,C,D have atomic numbers Z , 1 ,Z, Z +1 and Z +2 Respectively If Z is 9, then bond between which pair of elements will be ionic.

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A and C

D and C

D and B

B and C

In the purification of bauxite , the ore is fused with sodium carbonate in the process

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Baeyer's process

Hall's process

Serpeck's process

Any of above

A boy accidently splashes a few drops of conc. H2SO4 on his cotton shirt. A few minutes later, the splashed part blacken and holes appear.This is because the sulphuric acid.

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Heats up the cotton so that it burns

Dehydrates the cotton

Causes cotton to react with oxygen of the air

Removes the elements of water from cotton

The hybridization of S in SO2 is.

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sp

sp2

sp3

dsp2

The vapours attacks the eyes and mucous membrane of nose and throat

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F

Cl

I

Br

The important condition for the formation of chemical bond is that.

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Their electron clouds should not diffuse

Both atoms should have high electron affinites.

Both atoms should have same electronegativities

The process should be accompanied by the lowering in potential energy.

Sodium reacts with excess of oxygen to form

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Na2O

NaO2

Na2O2

NaO

Arrange the hydrides group 15 in the order of increasing boiling point.

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PH3 < AsH3 <SbH3 < BiH3 <NH3

PH3 <AsH3< SbH3< NH3 < BiH3

PH3 < AsH3<NH3 <SbH3<BiH3

NH3 < PH3 < AsH3 < Sb H3 < BiH3

Example of linear geometry

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XeF2

F2 and HgCl2

CdI2 AND Ag Cl3

All of the above

Group IV A consist of elements

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3

4

5

6

Is a peroxy acid

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H2SO5

H2S2O6

H2SO4

H2S2O7

A molecule the cannot be susperimposed on its mirror image is said to exhibit which of the following.

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Geometrical isomerism

Optical isomerism

Linkage isomerism

Reactive isomerism

Gases and dust particles are removed from H2SO4 by

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Tydal effect

Drying tower

Absorption tower

Contact converter

Group IV A consist elements.

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3

4

5

6

Phosphorus has the oxidation state of +3 in

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Orthophosphoric acid

Hypophosphoric acid

Metaphosphoric acid

Orthophosphorus acid

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