Question # 1

Which of the following statement is incorrect about rock salt type

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It has for arrangement of Na+

Na+ and Cl- ions have coordination number of 6:6

A unit cell of NaCl metals have rock salt type structure.

None of them

Alumina is not used as

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Refractory material

A medium in chromatography

An abrasive

A White pigment

In plant noise control, which of the following method is used for reducing noise

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Plant planning

Control at the source

Control of radiated noise

All above

1-Chlorobutane on reaction with alcohols potash gives.

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1- butane

1-butanol

2- butane

2- butanol

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

The formula of bleaching powder is.

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Ca OCl2

CaCIO3

Ca(CIO)3)2

CaOCI

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

Not a major contributor of engineering ceramics

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SiC

SiO2

Si3N4

BH3

Sodium silicate is used

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In the paint industry

For fixing labels to glass

In a soap industry

All above

The variation of enthalpy of reaction with temperature is given by.

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Hesse's law

Clasisus Clapayron equation

Kirchoffs equation

Arrhenious equation.

Acid rain effects

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Human being

Crops

Aquatic life

All above

Which of these historical works of art contain nanotechnology.

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Lycurgus cup

Medieval stained glass windows in churches

Damascus steel swords

All of the above

Form electron deficient compounds

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B

AI

Both B and AI

None of above

Ozone filters out radiation below.

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o

1000 A

o

2000 A

o

3000 A

o

4000 A

Which of the following energy is trapped by the autotrophic organisms.

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Mechanical energy

Electrical energy

Radiant energy

Electronic energy

An equilibrium the free energy change delta F for a reaction is.

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Maximum

Minimum

Zero

Negative

The correct order of electron affinities of SI, P, and Cl is.

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P > Si > Cl

Cl > P > Si

Cl > Si, > P

Si > P . Cl

Which of the following alkaline earth metals occurs in radioactive form in nature.

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Ca

Mg

Ra

Ba

Which of the following concentration term is used in respect of standard solutions.

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Normality

Formality

Molarity

All of above

Phosphorus is detected by fusing the organic compound with -------followed by extraction with H2O

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HNO3

H2SO4

Sodium per oxide

Ozone

Aluminium halides is.

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White crystalline solid

Hygroscopic

Sublimes at 180^oC

All above

Which of the following element has six electrons in the valence shell but cannot exhibit a maximum co valency of six.

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Sulphur

Oxygen

Selenium

Both A and B

Berllium has diagonal relationship with

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Li

Al

B

Na

What corrosion occurs under organic coating on metals as fine wavy hairlines?

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Stray current corrosion

Microbiological corrosion

Filiform corrosion

Simple corrosion

The attraction which exists between carbon dioxide molecules in solid carbon dioxide is due to.

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Van der Waal's forces

Molecule ion forces

ionic bonds

hydrogen bonds

Natural fertilizers are materials derived from

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Plants

Animal

Algae

All of above

It is possible to distinguish between optical isomers.

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Using chemical tests

By mass spectrometry

By IR spectroscopy

By polarimetry

Which sequence of steps is correct in paper making machine

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Pressing Dyring, Flow spreader Calender stock

Flow spreader, Pressing, Prying Calender sock

Drying ,Pressing , Flow spreader, Calender stock

None of above

The percentage of nitrogen in ammonia is _______________%

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32

82

25

55

Which of the following gas is lightest.

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Dihydrogen

Helium

Dinitrogen

Dioxygen

CNG is stored under

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Power genertion

Electric Generators

Solvent

All of above

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