Question # 1

According to recent view which is the correct representation of hydrated proton in aqueous solutions.

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H+

H9O3+

H9O4+

H2O+

B.P of heavy water is

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equal to that of ordinary water

greater than that of ordinary water

Less than that of ordinary water

equal to that of distilled water

A red color gas, on condensing ti gives a dark blue liquid.

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NO

N2O

N2O3

N2O4

Which of the following alloys contains Cu and Zn

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Bronze

Brass

Gun metal

Type metal

Of the molecules, SF4, XeF4, and CF which has square planar geometry.

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SF4, XeF4 and CF4

Sf4 only

CF4 only

XeF4

All the strong acids have very close pKas value and they appear to have nearly equal strengths in aqueous solutions. The phenomenon is called as.

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Levelling effect

Differnetiating effect

Levelling solvent

Differnetiating solvent

Which of the following process is not involved in the purification of bauxite.

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Bayer's process

Serpek's process

Hall's process

Goldsmith's process

The high oxidizing power of halogens is favored by.

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Low heat od dissociation of X2

A high electron affinity of the atom

A higher hydration energy of the ion

All of above

Setting of cement is improved by

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Lime stone

Clay

Gypsum

Water

What % if nickel is present in the major ore Pentlandite.

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22%

18%

14%

10%

The energy gap between two bands so large that it effectively prevents the promotion of electron from the lower to the higher band such energy gap all called.

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Ionization zone

Dissociation zone

Distinction zone

Forbidden zone

Group III A of the periodic table consist of elemetns.

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3

4

5

6

The correct order of increasing polar character is.

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H2O < NHE < H2S < HF

H2S < NH3 < H2O < HF

NHE < H2O < HF < H2O

HF < H2O < NH3 < H2S

Electron gas theory is able to explain

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Metallic lusture and optical properties

Malleability and ductility

High electrical and thermal conductivity

All of the above

Of the molecules, SF4 Xe F4 and CF4 which have square planar geometry.

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SF4 , Xe f4 and CF4

SF4 only

CF4 only

XeF4 only

The formula of sulphur sequioxide

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SO4

S2O7

S2O3

SO3

If the absorbed light is green the transmitted light will be

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Purple

Orange

Violet

Black

O2 molecule is.

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Fermagnetic

Forromagnetic

Paramagnetic

Diamagnetic

In group theory the triple degenerate set is denoted by

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eg

t2g

e2g

tg

Molten iron withdrawn from the blast furnace is called.

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Wrought iron

Pig iron

Bessemer iron

Stainless steel

Consider the coordination compound Na2[Pt(CN)4] the Lewis and is

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[Pr(CN)4]2

Na+

Pt

Pt2+

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