Question # 1

Monel metal is a alloy of Ni which constrains Ni uptown

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50%

60%

70%

80%

Among the following statements in the nitration of aromatic compounds, the false one is.

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The rate of nitration of benzene is almost the same as that of hexadeutero benzene

The rate of nitration of toluene is greater than that of benzene

The rate of nitrationof benzen is greater than that of hexadeutero benzene.

Nitration in an electrophite substitution reaction.

Which of the following will have the largest pH?

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O.1 N HCl

0.1 N CH3COOH

0.1 N NaOH

0.01 N NaOH

Keeping in view the periodic law and periodic table, suggest which of the following elements should have maximum electronegative character.

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Oxygen

Nitrogen

Fluorine

Astatine

Red colour of glass of due to the presence of

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Cu2O

CoO

MnO2

CdS

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

A stable molecule is a group of atoms held together by

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Chemical forces

Physical forces

Valence force

None of above

Which of the following statements in incorrect.

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Sodium hydride is ionic

Beryllium chloride is covalent

CCl4 gives a white ppt with AgNO3 solutions.

Bonds in NaCl are non directional

Which of the following gas is lightest.

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Dihydrogen

Helium

Dinitrogen

Dioxygen

Strong field ligands such as CN

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Usually produce high spin complexes and small crystal field splitting

Usually produce low spin complexes and small crystal field splitting

Usually produce low spin complexes and high crystal field splitting

Cannot form low spin complexes

The rising world temperature will have serious effect on.

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Agriculture

Animal production

Human being

All above

A colloidal system in which both the dispersion phase and dispersed phase are liquid is.

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Smoke

Emulsion

Whipped cream

Mist

Which of the following metal acts as pollutant.

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Hg

Pb

Zn

Ni

All above

In group theory the triple degenerate set is denoted by

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eg

t2g

e2g

tg

The expected specific waste of food industry is.

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Meats

Nuts

Fats or Oils

All above

Dibornae is used

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Fro high energy fuel

For welding torches

as reducing agent

All above

Which of the following is not a component of hollow cathode lamp.

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Anode

Cathode

Filter gas

Atomic vapour

Which of the following health effect is caused by mercury.

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Nerve damage

Brain damage

Kidney damage

All above

The unit of sodium chloride structure is.

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Linear

Cubic

Tetrahedral

Square planner

The most promising technique for solar production of electricity is.

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Dry cell

Battery

Solar cell

None of above

In the Lewis formula of which of the following species, the number of single double and dative bonds are equal.

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N2O3

HNO3

SO2

SOCl2

Group IV A consist of elements

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3

4

5

6

Which of the following phenomenon are driven by solar energy.

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Winds

Water cycle

Production of biomass

All above

Oxalic acid when heated withe conc. H2SO4 it gives out.

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H2O and CO2

CO and CO2

CO2 and H2S

Oxalic sulphate

Which of the following statement is not related with high quantum yield reasons.

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Formation of reactive intermediates which may act as catalyst

The active molecules may collide with other molecules and activates these molecules.

The reaction may be exothermic and heat evolve may activate other molecule

The primary photo chemical process may be reversed

Which of the following is not biological characteristics of water.

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COD

Animals

Plants

Viruses

Types of carides

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Ionic carides

Covalent carbides

Interstitial carbides

All above

The correct order of acid strength is.

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HIO4 > HBrO4 > HCIO4

HCIO4> HBrO4 > HIO4

HBrO4 > HIO4 > HCIO4

HBrO4 > HCIO4 > HIO4

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

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Gray iron

Malleable iron

White iron

None of these

Sugar and common salt in a mixture can be separated through then process of.

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Sublimation

Distillation

Ion exchange

Crystallization from solution in ethanol

The particle would be stationary in a lattice only at.

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273 K

0 K

298 K

373 K

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