Question # 1

The major role of Flurospar which is added in small quantities in the electrolytic reduction alumina dissolved in fused cryolite is.

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As a catalyst

To make the fused mixture very conducting

To lower the temperature of the melt

To decreases the rate of oxidation of carbon at the anode

in the process of production of soap the soap can be salted out by adding

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Concentrated sulphuric acid

Concentrated potassium hydroxide solution

Concentrated sodium chloride solution

None of above

The central metal atom or ion and the ligands that are directly attached to it are enclosed in a square bracket called.

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Coordiantion complex

Coordination sphere

Coordination number

Coordination compounds

What refer by the ability of steel to be hardened through to its centre in large section?

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Malleability

Hardenability

Ductility

Rigidity

Which of the following material is a constituent of crop residue.

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Cull

Fruit

vines

Bagasse

All above

In German Silver copper is alloyed with which metal.

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Zn

Ni

Ai

Zn and Ni

In which of the following compound valency of carbon in 4 but its oxidation number is zero

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Methane

Carbon dioxide

Carbon monoxide

Formaldeyde

Consider the coordination compound K2[Cu(CN)4] A coordinate covalent bond exists between

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K+ and CN-

Cu2+ and CN-

K_ and [Cu(CN)4]2+

C and N in Cn

The point group of XeOF4 is.

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C6v

C4h

D4h

D2h

Which of the following interaction is the strong.

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Dipole -dipole

Ion induced dipole

Ion -dipole

Dipole induced diple

Anhydrous AlCl3 cannot be obtained by heating hydrated AlOI3 ,6h2o Because.

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It decomposes completely to give Al2O3

It does not lose water completely

It undergoes hydrolysis to give Al(OH)3

AlCl3 .6H2O is very stable.

Metal are

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Hard

Ductile

Malleable

All

An example of acyclic polytropenoid is

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Myrcone

Buna -S

Synthetic rubber

Natural rubber

Hydrogen gas will not redue

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Heated cupric oxide

Headed ferric oxide

Heated stannic oxide

Heated aluminium oxide

Main constituent of all inorganic matter

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Carbon

Silicon

Tin

Lead

Which of the following statement is not correct regarding the constant R . and in ideal gas equation PV= nRT

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Its value in independent of temperature

Its value is independent of pressure

In SI Units its value is 8.314 K^-1 mol^-1

It is called the universal gas constant per molecule.

Which of the following substance is most abundant of all components of atmospheric air.

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O2

N2

CO2

A2

Coordination compound show

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Structural isomerism

Stereo isomerism

Both A and B

None of above

The most harmful components of incomplete combination are generally groped as particulate polyclic matter organic (PPOM) These materials are derivatives of .

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Benzene

Naphthalene

Benz a pyrene

None of the above

VBT is unable to explain the nature of some of the complexes of.

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Cobalt

Copper

Nickle

Manganese

Which of the following statements is not correct with respect to errors in flame photometry.

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Errors rising form the phenomena developed in the Hollow cathode lamp

Background effect

Errors arising from test element itself

Spectral interference

Metallic bond is treated essentially as in character

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Ionic

Covalent

Polar

Non polar

How much amount of NaOH is required to prepare 100 mL of 1 N solution.

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80 g

4 g

40 g

zero

Which of the following process is not sorbent separation technolgy.

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Penex

Parex

Molex

Olex

Photochemical among is related to pollution of

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Air

Water

Soil

All of the above

pKa value of hyponitrous acid is.

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-7.0

8.9

4.1

6.6

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

Aluminium is used for.

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Making ultensile & framea

Making alloys

Reducing agent

All above

Which of the following should have the largest dipole moment.

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Carbon tetrachloride

Cis-stibeue

Trans-atibeue

Cis-dichlorocthylene

Which one of the following is not formed when an electric discharge passes through helium.

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HeH+

HeH2+

He2+

He2-

Peeling of ozone umbrella is due to.

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CFCa

PAN

CO2

Coal burning

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