Question # 1

Disinfection of water by chlorine is done by the production of.

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NH2Cl

NCl2

HOCl

NHCl2

Chlorine heptoxide (CI₂O₇) reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Third abundant element on earth crust is.

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Boron

Oxygen

Aluminium

Silicon

The anhydride of HCIO₄is

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CIO₃

CIO₂

Cl₂O₅

Cl₂O₇

Common names of aldehydes are derived from the common names of.

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Alcohol

Ketones

Carboxylic acids

Alkenes

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

Which compound will have the maximum repulsion with water

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C₆H₆

C₂H₅OH

C₃H₇OH

CH₃OCH₃

Boron usually exist in nature as

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Borides

Oxborates

Free element

It is a artificial element

Group VI B of transition elements contains.

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Zn, Cd, Hg

Fe, Ru,Os

Cr, Mo, W

Mn, Te, Re

Banana flavour is given by the ester

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Octyl acetate

Amyl butyrate

Amyl acetate

Ethyl butyrate

Which is not an ore of iron

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haematite

Magnetite

limonite

Cassiterite

Which metal oxide is insoluble in water

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MgO

CaO

SrO

BaO

Sulphur is essential constituent for plants. Which is not role of sulphur

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Chlorophyll development

Development of root system

Constituents of some proteins

Increase transpiration force

Essential amino acids are those which

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Are present in every protein

Must be supplied to body through diet

Contain two carbocyclic acid and one amino group

Is syntherised by our body

Synthetic rubber is made by polymerization of.

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Chloroform

Acetylene

Divinylactylene

Chloroprene

Lactose has same molecular formula as

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Glucose

Fructose

Ribose

Maltose

f-block elements are also called

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non typical transition elements

outer transition elements

normal transition elements

inner transition elements

For which mechanisms, the first step involved is the same

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E₁and E₂

E₂and SN₂

E₁and E₂

E₁and SN₁

Which compound is the most reactive

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Benzene

Ethene

Ethane

Ethyne

Conversion of phenol to benzene is known as.

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Oxidation

Reduction

Hydrolysis

Hydration

The total number of translation elements is

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10

14

40

65

The concept of atomic number was introduced by

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Alrazi

Mendeleeve

Moseley

Dobereiner

Acetic acid is commercially prepared form

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Ethene

Ethane

Ethyne

Ethanol

Which raw material is used for preparation of bleaching powder.

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Cl2 and H2O

Cl2 and Lime

Cl2 and HOCl

HCl and Lime

S_N2 reactions can be carried out with

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Primary alkylhalide

Secondary alkyhalide

Tertiary alkylhalide

All of these

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