Question # 1

Which of the following item is not symmetry element.

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Pllane of symmetry

Inversion centre

Improper rotation

Optical activity

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

Which of the following cast iron is heat treated for ductility.

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Gray iron

Malleable iron

White iron

None of these

The enrichment of chemical substance at the surface of a solid is called

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Adsorption

Absorption

Sorption

Isotherm

Which of the following substance is a volatile metals.

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Lead

Zinc

Mercury

Sodium

In compressive strength of a nanotube ______ its tensile strength.

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I less than

Is greater than

Is equal to

Less than or equal to.

Which of the following configuration of an ionic species represents psedue noble gas configuration.

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ns2

ns2 np6

ns2 np6 nd 10

ns2 np3

The pH of the tears is

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7.0

7.4

7.8

8.2

The ration of thermal conductivity of silver to that of a carbon nanotube is.

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100 : 1

1 :100

10:1

1:10

Which of the following has hexagonal structure.

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Sodium chloride

Potassium choride

Diamond

Graphite

Al Cl3 is used in

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Manufacturing of petrol

In borax bead test

Prezervation of food

All above

Which of the following is not known.

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KrF6

XeF6

XeO3

KrF2

Which of the following statement is not relevant with nitrous oxide.

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It is a colorless and odourless gas

It is non toxic gas

It is present in the atmosphere in higher concentration

It has high reactivity in the lower atmosphere

The oxidation state of HCiO4

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+ 7

+ 3

+ 5

+ 1

Major ingredients of traditional ceramics

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Silica

Clay

Feldspar

All

Which of the following gas protects us form harmful effect of uv radiation.

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SO2

NO2

CO

O3

Which of the following species is determined by complex metric titrations.

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K+

Na+

Ca+

Cl-

Of all the noble gaes, easily available gases are

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He & Ar

He & Ne

Ne & Ar

Xe & Kr

The plate height is the length of the column divide by

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Length of the column

Width of the column

Number of theoretical plates

Number of components of the mixture.

Covalent compound are soluble in

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Polar solvents

Non polar solvent

Concentrated acids

All solvent

Is a peroxy acid

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H2SO5

H2S2O6

H2SO4

H2S2O7

A 10% solution of sucrose contains 10 g of sucrose in how much volume of the solution.

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10 mL

100 mL

1000 mL

1 mL

Ca2+ is isolelectronic with.

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Mg2+

Kr

Ar

Na+

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

Solution with components which obeys Raoult's over the entire composition range are said to be.

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Real solution

Regular solutions

Dilute solutions

Ideal Solution

Aluminium hydroxide is.

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An acid

An amphoteric hydroxide

A base

An explosive hydroexide

Which of the following molecule does not contain the covalent bond between similar atoms.

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N2H4

F2O2

H2F2

H2O2

The word 'ceramic' meant for.

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Soft material

Hard material

Burnt material

Dry material

Which of the following is atmospheric pollutant.

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CO2

CO

O2

N2

Which of the following statement is not correct with respect to hydrolytic cycle.

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Water covers about 83% of the earth's surface

Water covers about 73% of the ear5th's surface.

It is the major constituent of the lithosphere

it is essential requirement of all the organisms

Lead pencil contain

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Lead

Lead sulphide

a mixture of lead and silica

graphite

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