Question # 1

Used for sterilizationof drinking water

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F

Br

Cl

I

Which of the following process is used for the removal of gases.

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Precipitation

Chemical reaction in the atmosphere

Absorption

All above

Which of the following statements is not related with entropy.

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It is a measure of disorder

It is a measure of unavailable energy

It is a function of thermodynamics probability

It is a path function

Any substance which has solidified from the liquid state with crystallization is known as

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Steel

Fibre

Glass

Asbestos

Among alkali metals, the least metallic element is.

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Li

Na

Rb

Cs

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

Which of the following species is very good oxidizing agent.

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MnO₄

H+

Zn²⁺

Fe³⁺

Which of the following is not chemical characteristics of water.

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pH

COD

BOD

Colour

The noble gas used or treatment of cancer is

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Helium

Argon

Radon

Krypton

Which of the following is not a component of flame photometer.

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Pressure regulator and flow meter

The atomizer

The burner

Hallow cathode lamp

The electronic configuration of chromium is 4s1, 3d5, The elements tungsten (W) belongs to the same group and has atomic number 74.The configuration of its valence shell is.

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5s1, 4d5

6s1, 5d5

6s1, 5d6

6s1, 5d4

How many sigma and pi bonds are there in a CO2 molecule.

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2 sigma

2 sigma and 4 pi

2 sigma and 2 pi

4 sigma and no pi

Select a basic amino acid.

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Glycine

Cystine

Alanine

Lysine

How many planes of symmetry are present in benzene.

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1 plane

3 planes

5 planes

7 planes

The angle of rotation in a polarimeter depends on.

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Nature of the compound

Nature of the solvent

Wavelength of the light used

All above factors.

The wire of flash bulb is made up of.

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Cu

Ag

Mg

Ba

Which of the following carbonates decomposes at the highest temperature.

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Mg CO3

CaCO3

Sr CO3

Ba CO3

SO3 exists in form

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a -so3

b-SO3

gama SO3

All above

Which of the following factors does not effect the rate of the reaction.

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Pressure

Temperature

Concentration

Catalyst

All of the above

Pig iron is also called.

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Cast iron

Steel

Wrought iron

Stainless steel

Naphthalene balls are obtained from

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Carbon

Coke

Coal Tar

All of above

Which of the following technique describes titrations in which a standard iodine solution is need.

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Iodometry

Iodimetry

potentiometry

Argentometry

The ions Sc3+ , Ca2+ and K+ have same electronic configuration as that of.

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Neon

Argon

Krypton

Xenon

Which is the strongest reducing agent.

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HF

HCl

HBr

HI

Both the elements shows allotropy

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B & Ai

B & Si

Al & Si

Any of above

What ASTM test for shear strength is designated for plastics.

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D 732

D 790

D 695

D 638

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 substances act as pollutant.

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Oils

Greases

Toxins

All above

The electrophile in the sulphonation of benzene is.

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SO3

SO3H

HSO4

SO2

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

Natural gas can be transported through

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Cylinders

Pipes

Barriers

All of above

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