Question # 1

What is prefix in steel identification means it is made in an electric furnaced.

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E

H

B

Z

Volta metric technique using a dropping mercury electrode is called.

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Amperometry

Coulometry

Polarography

Potentiometry

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.

Which of the following gas does not exist free on earth.

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N2

H2

O2

CH4

In the electronic structure of acetic acid,the total number of shared and unshaped pair of electrons are respectively.

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16 ,8

8 ,4

12 ,8

8 ,12

Blue color of glass of due to the presence of .

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Cobalt (II)

Chromium (III)

Iron (III)

copper (II)

Which of the following statements do not represent Lewis idea of acids and base?

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Compounds which have completely filled orbitals

Compounds which have incompletely filled orbitals

Compounds in which the central atom can expand its octel

All simple metal ions like Ag+, Al3+ etc.

A chromophore is an isolated fractional group which has

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Coloured appearance

Absorption in UV visible region

Only sigma bonds

Absorption in the region

In quantum theory, which of the following tells us that the prediction of quantum mechanics must pass smoothly into those of classical mechanics as we progress in a continuous way from microsopic to macroecopic.

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Uncertainty principle

Correspondence principle

Probability distribution

Aufbau principle

The efficiency of a reversible heat engine depends only on the

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Temperature of the heat sink

Temperature of the heat source

Temperature of the heat source and sink

Pressure of the fluid

Which of the following statements is incorrect.

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The elements of group 18 are known as aerogens.

Group 2 elements are all metals

Metallic character increase on going down a group

All the elements belonging to a particular period have same valence shell configuration.

In the long form of periodic table, elements are arranged according to.

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Increasing atomic number

Decreasing atomic number

Increasing atomic mass

Decreasing atomic mass

Which of the following devoice is used to measure potential difference between celctrodes.

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Polarimetre

Conductometer

Voltmeter

Photometer

Which element out of the following can exhibit a maximum co valency of seven.

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Chlorine

Fluorine

Sulphur

Both Cl and F

Which of the following term is not used in pulping.

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Kappa number

Copper number

Bromine Number

Octane Number

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

Which of the following salt is water insoluble.

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K2SO4

Na2SO4

BaSO4

None of abvoe

Berllium has diagonal relationship with

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Li

Al

B

Na

In which paper some additive is not added.

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Carbon paper

Filter paper

Glazed paper

Art paper

White Phosphorus is kept under

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Cold water

Ammonia liquor

Ethanol

Kerosene

Detergents are known to pollute revers and water ways. However, detergents can be made biodegradable and pollution free by taking.

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cyclic hydrocarbon chain

Shorter hydrocarbon chain

Unbranched hydrocarbon chain

Benzenoid hydrocarbons

Ammonia is utilized for

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Manufacture of urea

Oxidation to nitric acid

Manufacture of ammonium sulphate

All above

Which of the following unit cells has least symmetry.

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Monocline

Cubic

Triclinic

Tetragona

Chief source of water and soil pollution in

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Mining of ores

Thermal power plant

Agro industry

All the above

The formula of Borax is.

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Na2B4O7 6H2O

Na2B4O7 8H2O

Na2B4O7 10H2O

Na2B4O7 12H2O

Which of the following is not biological characteristics of water.

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COD

Animals

Plants

Viruses

Which of the following is a buffer solution.

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CH3COOH + NH4OH

CH3 COOH + HCl

CH3COOH + NaOH

CH3COOH + CH3COONa

Environmental pollution effects.

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Biotic component

Plants only

Humans only

Both biotic and abiotic components of environment

Dry ice is

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Solid CO

Solid CO2

Solid NH3

Solid SO2

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

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Steel

Fibre

Glass

Asbestos

Dyes used in photographic plates to make them panchromatic is.

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Cyanine dyes

Azine dyes

Phthalocyanine dyes

Acridine dyes

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