Question # 1

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

Dichloromethane reacts with halogens in the presence of diffused sun light and produces

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Carbon tetrachloride

Chloroform

Chloromethane

No reaction

Citric acid is present in

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Citrus fruits

Sour milk

Rancid butter

Apple

These are safe source of food and energy for body during emergency.

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Proteins

Vitamins

Carbohydrats

Lipids

About 99% of atmospheric mass lies in.

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35 km

30 km

15 km

16 km

In forth flotation process the ore particles are preferentially wetted by:

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water

oil

benzene

petrole

The % age of carbon is lignite is

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60

70

80

90

Halogenation of methane on the presence of diffused sunlight takes place.

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Only in one step

Slowly in one step

Freshly in two steps

In a series of four steps

In a Reversible Reaction if Qc = Kc then.

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Reaction is occuring in forward direction

Reaction is occuring in Reverse direction

Equilibrium has been allained

Reaction is not at equilibrium

Example of pest is

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Weeds

Herbs

Insect

All of them

The color of Iodine is:

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Purple

Black

Red

Pink

The 1st organic compound prepared in laboratory.

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Urea

NaCl

Thiourea

Pyridine

When the rate of a the forward reaction takes place at the rate of reverse reaction the composition of the reaction mixture remains constant it is called.

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Chemical equilibrium

Dynamic equilibrium

Static equilibrium

All

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