Question # 1

The enzyme which bring about exchange of functional group between two compounds is called.

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Hydrolases

Transferase

Lyases

Ligases

The fiber in which monomer isCH2=CH-Cl is known as

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Saran fiber

PVC

Rayon fiber

Arcylic fiber

Phosphorous helps the growth of

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root

leave

stem

seed

Boric acid cannot be used

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As antiseptic in medicine

For washing eyes

In soda bottles

For Enamals and Glazes

The type of hybridization in PCl3 is.

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dsp2

sp3

dsp3

d2sp3

Which amino acid is present in cheese

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Glycine

Alanine

Tyrosine

Valine

The benzene molecule contains.

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Three double bonds

Two double bonds

One double bonds

Delocalized sigma electron charge

What criteria did Mendeleev use in arranging his periodic table.

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Atomic mass

Atomic number

Mass number

Density

Whcih water will be considered as polluted water.

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High value of COD

Low value of COD

High value of DO

Low value of BOD

Al reacts with caustic soda to form

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Sodium aluminates

Aluminium hydroxide

Aluminium oxide

sodium tetra aluminate

Which one of the following is a condensation polymer

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Polystyrene

Polyester

Polyethene

Nylon 6,6

Which substance is used to convert ethanol to ethyl chloride

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SOCl2

PCl3

PCl5

All of these

An element that has a 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

Boric acid can not be used.

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As antiseptic in medicine

For washing eyes

In soda bottle

For enamels and glazes

Stability of halogen molecules decreases from

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F2 to I1

Cl2 to I2

I2 to F2

I2 to Cl2

The news paper can be recycled again and again as many times as

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5

3

4

2

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

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1-2

3-5

6-8

7-9

In pyrite burner, the gas produced is.

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SO3

SO2

CO2

NO

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