Question # 1

Which of the following statements is false about transition metals.

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They form complexes

They show variable valency

All transition metal compounds are paramagnetic

They form coloured ions

Atomicity of which of the following pair of elements is not same as hydrogen.

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Phosphorus, Nitrogen

Nitrogen, Argon

Nitrogen, iodine

Iodine, sulphur

The nutrients which are required in very small amount for the normal growth of plants are called.

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Nitrogenous fertilizers

Micronutrients

Phosphorus fertilizer

All of the above

RNA is involved int eh synthesis of

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Protein

Nucleic acid

Carbohydrates

Fats

What is the effect of aluminum in cast iron.

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To increase hardness above 0.5 %

To deoxidize molten cast iron

To affect machinability, ductility and shrinkage depending on form

Both A and B

The dye obtained from madder root

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Indogotin

Indanthrene

Alizarin

Acriflavin

Which compound among the following does not contain an ionic bond.

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NaOH

HCl

KaS

LiH

Copper occurs in nature as.

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Native

Combined

Both native and combined

None of the above

Select the correct IUPAC nae for [Co(NH3)6 ]2+

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Hexammoniacobaltate (II) ion

Hexaamminecobaltate (II) ion

Hexammoniacobalt (II) ion

Hexaamminecobalt (II) ion

While compacting the concrete by a mechanical vibrator, the slump should not exceed.

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2.5 cm

10 cm

3.1 cm

5.0 cm

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

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White plate

Black plate

Tin steel free

Dichromate tin

The rusting of iron is catalyzed by which of the following.

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Fe

H+

O2

Zn

Which of the following pollutant result from combustion of fossil fuels.

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SO2

NOx

CO

All above

An induction of dipole or polarity in non polar bond, and consequent electron shifting along a chain of atoms is known as.

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Inductive effect

Resonance effect

Hyper conjugation

None of the above

Which number of halogen family does not show positive oxidation state.

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Fluorine

Chlorine

Bromine

Iodine

The number used in cancer therapy is.

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Fe

Co

Ni

Rn

Which of the following electrode is normally used as reference electrode for a potentiometer.

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Platinum electrode

Calomel electrrode

Silver electrode

Copper electrode

Brass is an alloy of

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Copper and tin

Copper and zinc

Aluminium and nickel

Leed and tin

The most promising technique for solar production of electricity is.

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Dry cell

Battery

Solar cell

None of above

Used in producing intense light in cinematography

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Xenon

Krypton

Radon

Helium

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

The role of the mineral cryolite Na2AlF6 in the Hall process for aluminum production is.

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It is the source of aluminum

it is a chemical reducing agent

It forms a slag to remove impuriteis

In the molten state, it is a solvent for alumina Al2O3

The atomic orbitals are progressively filled in order of increasing energy. This statement is called as

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Hund's rule

Aufbau's rule

(n+1) rule

Planck's rule

Which of the following salt is not used in salt bridge to minimize liquids junction potential.

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KCl

NH4Cl

KNO3

CaCl2

On the basic of CFT the bonding between the metal and ligand is totally

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Ionic

Covalent

Coordinate

Metallic

What of the following is not a Lewis base.

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CN-

AlCl3

NH3

ROH

Elements of group 14

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Exhibit oxidation state of -4

Exhibit oxidation state of +4

From M3+ and M4+ ions

Form M4- and M4+ iona

Domestic waste mostly constitutes

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Non biodegradable pollution

Biodegradable pollution

Effluents

Air pollution

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

The liquor is screened to exclude ________ material

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Fibrous

Polymers

Maltose

Sucrose

SAN is a polymer of

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Styrene

Acrylonitrile

Both A and B

Vinyl chloride

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