Question # 1

[Ti(H₂O)₆]⁺³ion absorbs colour:

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Blue

Yellow

Green

Red

The major portion of natural gas is

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Ethane

Propane

Butane

Methane

Which factor is helping to reduce the environmental pollution

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Rapid growth of population

Urbanization

Industrialization

Increase of plantation

Which of the following posses linear geometry

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Alkane

Alkene

Alkyne

Benzene

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Fe is reduced

Fe is oxidized

Cl₂is oxidized

None of these

Among the following the most reactive towards alcoholic KOH is

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CH₂= CHBr

CH₃COCH₂CH₂Br

CH₃CH₂Br

CH₃CH₂CH₂Br

Out of 110 known elements, transition elements are

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40

60

50

80

Acetic acid is manufactured by the fermentation of

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Ethanol

Methanol

Ethanal

Methanal

Which compound was recognized the parent member of aromatic compounds

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Aniline

Phenol

Benzene

Toluene

He Ar and Ne are:

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Mono-atomic molecules

Hetero atomic molecules

Poly-atomic molecules

Diatomic molecules

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

Which woody raw material is used for the manufacture of paper pupl

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Cotton

Bagasse

Poplar

Rice straw

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

f-block elements are called :

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Alkali metal

Alkakline earth metals

Transition elements

Electron deficient elements

Cyanohydrin of which of the following forms lactic acid

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HCHO

CH₃COCH₃

CH₃CHO

CH₃CH₂CH₂CHO

Variable valency is characteristic of

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Halogen

Transition elements

Alkali metals

Noble gas

In the particular reaction for the valueK_{c 1 x}10^-25which statement is correct :

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Almost forward reaction is completed.

Amount of reactant is negligible as compared to product.

Amount of product is negligible as compared to reactant.

Amount of product is equal to amount of reactant.

Natural rubber is a polymer of

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Butadiene

Ethyne

Styrene

Isoprene

Grignard reagent is prepared by the reaction of magnesium metal with alkyl halide in the presence of

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Alcohol

Water

Suephuric acid

Dry ether

Which isomers of C₅H₁₁OH gives, on dehydration, the greatest number of different alkenes

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Matals usually conduct electricity because

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There are mobile electrons in the metallic structure

Metals are decomposed by current

Metals have high resistance

In metals the ions are free to move

Which of the following is a strong electrolyte?

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Ca(NO₃)₂

HCN

CH₃COOH

NH₄OH

All are ortho & Para directing except

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X

OH

NR₃

NH₂

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

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Ag⁺

Cu²⁺

Al³⁺

Si⁴⁺

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

A double bond consists of

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Two sigma bonds

One sigma and one Pi bond

One sigma and two Pi bonds

Two Pi bonds

Scientific study of fermentation was first made by

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Buchner

Liebig

Biot

Pasteur

Which is not the condition for the formation of smog

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There must be sufficient NO gas

There must be sunlight to help photo chemical reaction to take place

Air must be blowing swiftly

There must be SO₂in the air

The configuration 1s²2s²2p⁵3s¹shows

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Excited state of O₂

Excited state of neon

Excited state of fluorine

Ground state of fluorine atom

A compound of the formula C₄H₁₀O_{reacts with sodium and undergoes oxidation to give a carbonyl compound which does not reduce Tollen's reagent, the original compound is}

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Diethyl ether

n-Butyl alcohol

Isobutyl alcohol

sec-Butyl alcohol

Result of ozone hole is

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Green house effect

Global warming

Acid rain

UV rays reach the earth

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