Question # 1

Elements of Groups IIA are called

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Alkali metals

Alkaline earth metals

Coinage metals

Halogens

Mono saccharides contain carbon atoms.

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3 to 6

3 to 7

3 to 9

only six

Which one of the following oxides is amphoteric in nature.

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MgO

Na2O

SO2

ZnO

Ortho boric acid on strong beating gives.

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Borax

Boron oxide

Metaboric acid

Tetraboric acid

In which of following processes are small organic molecules made into macromolecules

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the cracking of petroleum fractions

the fractional distillation of crude oil

the polymerization of ethene

the hydrolysis of proteins

Fats are

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Saturated glycerides

Unsaturated glycerides

Polyhydroxy ketose

Polyhydroxy aldose

Which makes a molecule more stable.

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Greater localization of pi electrons

Less delocalization of pi electrons

Greeter delocalization of pi electrons

Less delocalization for pi electrons

------------------- is not a nucleophile

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H₂O

NO₃

BF₃

NH₃

During Nitration of Benzene the active nitrating agent is

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NO₃

NO₂⁺

NO₂

HNO₃

Boiling point range of petroleum ether.

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5- 20 ^oC

10- 30^oC

20- 60^oC

30- 90^oC

In which block of periodic table non metals are present.

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s

p

d

f

Peroxyacetyl nitrate is an irritant to humab beings and it affects

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Eyes

Ears

Stomach

Nose

Transition elements are those

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Which becomes before uranium

Which becomes after uranium

Which are prepared artificially

Which are in between s-block and p - block elements

Boric acid can not be used.

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As antiseptic in medicine

For washing eyes

In soda bottle

For enamels and glazes

Micro-nutrient is required in quantity for plant growth ranging from

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4-40 gm

6-200 gm

6-200 kg

4-40 kg

Methyl alcohol is not used

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As a solvent

As an anti freezing agent

As a substitute for petrol

For denaturing of ethyl alcohol

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

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Cotton

Biogases

Rice straw

Poplar

In which reactions alkane is not produced

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Subatier's and Sendern reaction

Koibe's reaction

Wolf -Kishner's reduction

Dow's process

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