Question # 1

In hydrogenation of vegetable oil catalyst employed is.

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Ni

Pt

ZnO

Cr₂O₃

Which compound protect teeth from diseases?

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Fluorine compound

Chlorine compound

Iodine compound

Bromine compound

The stratosphere layer is at height above the earth's surface.

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0-12 km

12-50 km

50-85 km

65-120 km

A strange bitter smell noticed near photo copier machine is of.

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H₂S

SO₂

O₂

O₃

Thousand of amino acids polymerize to form.

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Carbohydrates

Proteins

Lipids

Vitamins

Which factor determines the severity of a pollutant?

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Chemical nature

concentration

Persistence

All of them

In which one of the following is a substitution reaction?

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Halogenations of alkynes

Halogenations of alkenes

Halogenations of alkanes

Bromination of alkenes

When the magnitude of Kc is very large in indicates.

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Reaction never go to completion

Reaction is in equilibrium state

Reaction will complete after some time

Reaction has almost to completion

Red hair contains compound of.

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Iron

copper

titanium

Molybdenum

Atmospheric region found between 50-58 km from the earthis.

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Thermosphere

Stratosphere

Mesophere

Thermosphere

When HCl and KOH is reacted the salt formed is.

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Acidic

Basic

Normal

Complex

Ethyne is oxidized by alkaline KMnO₄ then ....... hydroxyl group add to the triple bond.

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Two

Three

Four

Five

The percentage of water in human body is about:

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60%

50%

70%

80%

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