Question # 1

Boric Acid is used

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In manufacture of pottery glaze

In medicine as an antiseptic

In tanning industry

All above

Which of the following species is very poor oxidizing agent

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H+

Zn²⁺

Fe³⁺

MnO₄

Not a major contributor of engineering ceramics

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SiC

SiO2

Si3N4

BH3

Fluorine form Fluorides reacting with

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Metals

Non metals

Metalloide

Any of above

The correct order of ionic radii for the following ions is.

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S²- < P^3- < Cl- < K+

Cl- > S2+ > P3- > k+

K+ > Cr > S2+ > P3-

P3+ > S2 > Cl - > K+

In the kinetic study of a reaction A _____________ products.

A straight line was observed when a graph between time and 1/C2 was plotted. the reaction is.

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Second order

First order

Third order

Zero order

What refers to the tin mill steel, without a coating.

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White plate

Black plate

Tin steel free

Dichromate tin

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

The capacity of normal human eye to see the smallest object is _______ micro meter

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10000

1000

100

10

The thermal conductivity of an SWNT along length is _____ watt/(m.k)

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35

330

386

3500

Which one of the following noble gas is obtained by radioactive disintegrastion

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Kr

Br

Rn

Xe

Enfleurage process is ued to extract the essential oils from

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Bark of plant

Seeds of plant

Leaves of plant

Flowers of plant

Dibornae is used

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Fro high energy fuel

For welding torches

as reducing agent

All above

Greenish yellow gas with pungent irritating odour

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Chlorine

Fluorine

Iodine

Bromine

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

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K+

Na+

Ca+

Cl-

The branch of chemistry which is concerned with the interrelation of electrical and chemical energy is called.

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Reaction dynamics

Electrochemisty

Surface chemistry

Kinetics

The percentage of nitrogen in Urea is _____________%

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46

37

82

50

Which of the following is the most suitable catalyst for ammonia synthesis.

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Pt

ZnO+ Cr2O3

Fe in fused mixture of Al2O3 + SiO2+ MgO

All of above

The simplest formula of a compound containing 50% of element X

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XY2

XY

X2Y

None of the abvoe

Which of the following physical properties is employed int he analytical methods.

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Electric current

Transition temperature

Surface tension

All above

Among oxides of nitrogen all are gases except.

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N2O5

N2O

NO

N2O3

The state of hybridization of carbon in CO2 is

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sp2

sp

sp3

dsp2

Greeks and Romans had used nanoparticles in the manufacture of.

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Cosmetics for eyes

Medicines

Metals

Hair -dye

At high temperature nitrogen combines with calcium carbide to give

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Calcium cyanide

Calcium cyanamide

Calcium nitride

Calcium cabonate

Which of the following is not obtained when Br2 is added to ethylene in the presence of aqueous NaCl solution.

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Br CH2CH2Br

Br CH2CH2Cl

ClCH2 CH2Cl

ClCH2CH2Cl

The wire of flash bulb is made up of.

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Cu

Ag

Mg

Ba

Which of the following has the greatest metallic character.

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Na

Mg

Al

Si

What ASTM test for shear strength is designated for plastics.

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D 732

D 790

D 695

D 638

The number of bonds formed by the central atom is called its.

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Valence number

Complex number

Coordination number

Avogadro's number

Which is the purest form of iron.

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Pig iron

Cast iron

Wrought iron

Steel

The criteria for aromatically is presence of

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Uneaturations

Cyclic structure

Presence of 4nx electrons

Presence of 4n + 2n electrons

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