Question # 1

Which of the following solution has highest normality.

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1 N H2PO4

0.5 N H2SO4

6 g NaOH per 100 cm3

4 g NaOH PER 1000 cm3

The greater stability of bonzyl carbonium ion as compared to t-butyl carbonium ion is due to.

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Inductive effect

Resonance effect

Electrometric effect

All above

The secondary valency of Conc. CoCl3. 6NH3.

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2

4

6

8

Which of the following is not known.

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KrF6

XeF6

XeO3

KrF2

Which of the following compound does not following octet rule.

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CS2

PBr3

IBr

Br F3

The maximum covalence of an element equal to.

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The number of unpaired d electrons

The number of paired p electrons

The number of unpaired a and P electors

The actual number of a and P electrons in the outermost shell

What is defined as a local corrosion damaged characterized by surface cavities.

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Cracking

Pitting

Cavitation

Corrosion

Which of the following statements is not true for both B and Al

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They burn in oxygen to give oxides at high temperature

Their halides are Lewis acids

They combine with nitrogen to form nitrides

They react with HCl to form chlroides.

Which of the following groups exert -1 effect.

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- NO2

- CN

-COOH

<C = 0

Hybridization involves.

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Orbitals of same atom with slightly different energies.

Orbitals of different atoms, but with equal energies.

Orbitals of the same atom but with widely different energies.

Orbitals of different atoms with different energies.

Which of the following acids acts as acid waste from coal mines.

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HCl

HNO3

CH3COOH

H3PO4

Stainless steel consists of which elements.

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Fe only

Cr only

Fe and Ni

Fe ,Ni and Cr

Cyclic polymers of ethylene glycol formed by condensation are called.

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Crown ether

Brown ether

Cryptates

Both A and C

Which of the following state is not correct regarding Langmunir adsorption theory.

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Adsorbent has specific equivalent sites

One site can adsorbs only one molecule

Adsorbed molecules cannot interact with each other

Adsorption is a static process

The value of comprehensibility factor (z) = pV/nRTfor an ideal gas is equal to.

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R

1

2

3

Which one of the following ionsis colourless.

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Cu+

Ni2+

Co2+

Fe3+

Since the acid gives both acidic and normal salts so the acid is.

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di acid

di basic

double salt

Any of above

Which of the following statements correct regarding copper.

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It is used in electroplating

Its salts are used as insecticides

Its salts are used as coloring materials

All are correct

The formula of hexa borane is.

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B4H10

B6 H10

B5 H9

B8 H12

Which of the following has hexagonal structure.

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Sodium chloride

Potassium choride

Diamond

Graphite

Which of the following would decompose at lowest temperature.

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MgCO3

SrCO3

BaCO3

CaCO3

Sterols are steroids having the functional gruup.

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Ketonic

Al;coholic

Phenolic

Aldehydic

The current voltage characteristics forms the basis of.

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Thermal analysis

Potentiometry

Polarography

Colorimetry

Amino acids are are important in biochemistry which of the following statements is not correct regarding amino acids.

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These are amphoteric substances tend to undergo internal protein transfer

In aqueous solutions these substances tend to undergo internal proton transfer

These for zwitter ion in aqueous medium

These always contain two amino groups.

What is the purpose of molybdenum in steel alloying.

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To increase dynamic and high temperature strength and hardness

To increase brittleness

To increase corrosion and resistance

All above

In which paper some additive is not added.

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Carbon paper

Filter paper

Glazed paper

Art paper

Which is not true about polymers.

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Polymers do not carry any charge

Polymers have high viscosity

Polymers scatter light

Polymers have low molecular weight

Which of the following techniques is used for the separation of macromolecules polymers.

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Size exclusion chromatogrphy

TLC

GLC

HPLC

How many planes of symmetry are present in benzene.

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1 plane

3 planes

5 planes

7 planes

Phosphorus normally exhibit a covalency of.

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+1 and +2

+2 and +3

+3 and +4

+4 and +5

After assimilation urea leaves behind in the soil

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NH3

CO2

Both A and B

None of above

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