Question # 1

During manufacturing of cement , the temperature of pre heating zone is.

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500 ^oC

900^oC

1000^oC

1500^oC

Vinyl acetylene combines with HCl to form

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Polyacetylene

Benzene

Chloroprene

Divinyl acetylene

Which woody raw material is used for the manufacture of paper pulp.

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Cotton

Bagasse

Poplar

Rice straw

Benzene can not undergo.

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Substitution reactions

Addition reactions

Oxidation reactions

Elimination reactions

Which one of the following uses is not correctly related with the halogen.

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fluorine -------- Teflon

Chlorine ---------Bleaching powder

Bromine ---------------PVC plastics

Iodine -----------Iodex

When methane reacts with Cl2 is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

Basicity of ortho phosphoric acid is.

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1

2

3

4

Ethers show the phenomenon of

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Position Isomerism

Functional group isomerism

Metamerism

Chain isomerism

Paraldehyde is polymer of.

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HCHO

CH3CHO

CH3COCH3

CH3CH2-CH2OH

In water the concentration of dissolved O₂should be

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1-3 ppm

2-4 ppm

4-8 ppm

8-12 ppm

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule

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Hund's rule

Markowikov's rule

Pauli's Exclusion Principle

Aufbau Principle

Which of the following derivative connot be prepared directly from acetic acid.

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Acetamide

Acetyl chloride

Acetic anhydride

Ethyl acetate

In group V-A elements the most electronegative elements is

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Sb

N

P

As

Which one of the following elements burns in air to form an oxide which, when shaken with water, give a solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

Which one is metaphosphoric acid

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HPO3

H3PO3

H3PO4

H4P2O7

An aldehyde compound can be reduced to alkane by

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Wurtz reaction

Grignard reaction

Wolf Kishner reaction

Kolbe's reaction

The macronutrients are required in quantities ranging from

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4-40 kg per acre

10-100 kg per acre

5-100 kg per acre

5-200 kg per acre

Co-ordination number of Pt in Pt Cl(NO₂)(NH₃)₄

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2-

4

1

6

Which one of the following pairs of metal reactive directly with nitrogen

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Na and Mg

Li and Mg

Mg and Ca

Li and Be

Which of the following has highest M.P

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Aluminium

Silicon

Phosphorus

Sulphur

Group VI B of transition elements contains.

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Zn, Cd, Hg

Fe, Ru,Os

Cr, Mo, W

Mn, Te, Re

Prilling is a process in which

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Concentration of urea is increased

Water is removed from urea

Molten urea is converted to solid drop

Some other ingredients are added to urea

Which element form maximum compounds with Xenon

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F

Cl

Br

I

Which isomerism is not found in alkenes.

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Chain isomerism

Positional isomerism

Geometrical isomerism

Metamerism

During the manufacturing process of cement the temperature of the decomposition zone goes up to.

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600 ^oC

900 ^oC

1000 ^oC

1200 ^oC

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