Question # 1

Stable metal ions strictures are.

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Noble gas structure

Is electron group structure

Transition metal in structure

All of the above

The electronic configuration of some elements are given below. The element with highest electron affinity is

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1s2, 2s2, 2p3

1s2, 2s2, 2p4

1s2, 2s2, 2p5

1s2, 2s2, 2p6

Which of the following is raw material not present on the cement.

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Lime stone

Gypsum

Red lead

Blast furnace slag

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

What field of study encompasses procurement and production of metals.

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Metallurgy

Geology

Material science

Metalgraphy

Glass obtained by placing a layer of butyral plastic with a suitable adhesive between two layers of glass and cementing them by heat and pressure is called.

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Glass wool

Safety glass

Optical glass

Jena glass

In biological ecosystem which of the following substance is used by organisms.

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Water

Sunlight

Minerals

All above

Which of the following biogeochemical cycle is not component of ecosystem.

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Carbon cycle

Potassium cycle

Oxygen cycle

Nitrogen cycle

Which of the following is a mode of controlling pollution in big cities.

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Cleanliness and less use of insecticides

Proper disposal of organic wastes, sewage and industrial effluents

Broader roads and shifting of factories out of the residential areas

All of above

One ppm solution of NaOH Contain 1000 mg of the solute per how much of the volume of the solution.

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1000 mL

100 mL

10 mL

1 mL

Inert pair effect is best shown by

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Si

Z

Sn

Pb

The SI unit of pressure is Pascal it is define da sa force per unit are of 1N/m2 one atmosphere of pressure is equal to.

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760 mm of Hg

1 bar

101 k Pa

760 torr

All are correct

Which of the following is most basic.

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Aniline

Benzylamine

Diphenylamine

N-methylaniline

Helium oxygen mixture is used by deep sea divers in preference to nitrogen oxygen mixture, because.

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Helium is much less soluble in blood than nitrogen

Nitrogen is much less soluble in blood than helium

Due to high pressure deep under the sea, nitrogen and oxygen react to give poisonous nitric oxide.

Nitrogen is highly soluble in wateer

_____ remove the remaining color producing a water white sugar syrup

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Carbon filters

Centrifuge

Annealing

Refining

A mixture containing S2- and SO4 ions on trating with dil HCl will produce

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H2S gas

SO2 gas

H2S and SO2 gas

CO

Which one of following is non polar

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CH2Cl2

CCl4

CHCl3

CH3Cl

Which of the following metals form volatile carboyl with CO below 80^oC

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Cu

Fe

CO

Ni

The temperate of a gas below which only the gas cools when allowed to expand is know as.

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Inversion temperature

Ideal temperature

Critical temperature

Joule Thomaon temperatu4re

In sodium chloride type lattice, the ratio of coordination number of cation to anion is.

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6:6

7:7

4:8

4:4

Which of the following adsorption indicator is used for any of the halides at pH.

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Fluorescein

Eosin

Thorin

Rhodamine 6 G

The entropy change accompanying any physical or chemical transformation approaches zero as T approaches zero. This statement refers to.

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Helmholtz law

Third law of thermodynamics

Second law of thermodynamics

Nernat heat theorem

In second group of inorganic qualitative analysis, the S^2-ions does not form precipitate with which of the following ions.

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^Hg2+

Cu²⁺

Ai³⁺

Cd³⁺

Which of the following gas protects us form harmful effect of uv radiation.

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SO2

NO2

CO

O3

The number of coordinates required to specify the position of all the atoms in a molecule is called number of degree of freedom. The vibration degrees of freedom of a linear molecule containing N atoms are

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2N-5

2N -6

3N -5

N-6

Molten iron withdrawn from the blast furnace is called.

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Wrought iron

Pig iron

Bessemer iron

Stainless steel

The compound insoluble in acetic acid is.

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Calcium oxide

Calcium carbonate

Calcium oxalate

Calcium hydroxide

Estimation of nitrogen in proteins is generally arrived out by the method.

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Duma's method

Van Slyke method

Kjeldahl's method

Carius method

Which of the following methods does not give the weight average molecular weight.

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Sedimentation equilibrium

Sedimentation velocity

Light scattering

Osmotic method

Which is the strongest reducing agent.

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HF

HCl

HBr

HI

The first noble gas compound was

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XeO3

XeF4

XeF6

Xe +[PtF6]

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