Question # 1

Variable valency is generally exhibited by

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Transition elements

Alkali metals

s-block elements

Gaseous elements

Phosphorus helps in the growth of

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Root

Leave

Stem

Seed

Lactose has same molecular formula as

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Glucose

Fructose

Ribose

Maltose

Acetic acid is manufactured by.

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Distillation

Fermentation

Ozonolysis

Esterification

Arsenic impurities in contact process are removed.

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By prolong heating the gases

By treatment with Fe(OH)3

In scrubbing tower

In absorption tower

Which one is primary pollutant.

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Peroxyacetyl nitrate

Sulphuric acid

Carbonic acid

Carbon monoxide

The electrophile in Aromatic sulphonation is

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H₂SO₄

HSO₄^1-

SO₃

SO₃¹⁺

Ca Mg3 (SiO3)2 is the composition of.

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Dolomite

Gypsum

Calcite

Asbestos

Stainless steel is

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Compound

An element

Mixture

100% pure iron

Which one of the following is calcareous material

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Marine shells

clay

Shale

Blast furnace slag

Which one of the following is not an alkali metal.

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Francium

Cesium

Rubidium

Radium

Which is simplest amino acid

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Alanine

Protein

Lysine

Glycine

The flavor of octylacetate is

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Orange

Apricot

Banana

Jasmine

An element that has high ionization energy and tends to be chemically inactive would most likely to be

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an alkali metal

a transition element

a noble gas

a halogen

SO2 is not absorbed in water directly to form H2SO4 because.

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The reaction does not go to completion

The reaction is quite slow

The reaction is exothermic

SO3 is insoluble in water

PCl3 reacts with water to form

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PH3

POCl3

H3PO4

H3PO5

During pulp making, the pH of digester is maintained at.

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1-2

3-5

6-8

7-9

The shape of SiO2 IS

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Tetrahedral

Trigonal bipyramid

Linear

Cubic

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