Question # 1

Which contains sufficient amount of metal?

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Mineral

Ores

Rocks

Soil

In the bessemerization process.

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Roasted ore is beated.

Molten matte is removed.

Molten matte is heated

Molten matte is added

Which of the followings is a disaccharide?

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Glucose

Fructose

Sucrose

Starch

When the number of moles of both sides are equal in a reaction then the unit of Kc will be:

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no unit

mol-2 dm6

mol dm3

mo-2 dn

Water which produces good lather with soap is called.

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Soft water

Hard water

Heavy water

All of them

Which one of the following is not a greenhouse Effect?

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Increasing atmosphere temperature.

Increasing food chains

increasing flood risks

Increasing sea-level

Temporary hardness is removed by adding.

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Quick lime

Slaked lime

Lime stone

Lime water.

A conjugate acid is a specie formed by accepting a.

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Proton

Electron pair

Neutron

Electron

Traces of acetylene are present in coal gas about.

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0.06 %

0.08%

1.1%

90%

Earth has natural systems.

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One

Two

Three

Four

Which element protects teeth from decay?

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Potassium

Fluorine

Sodium

Calcium

When crude oil is heated in the fractionating tower:

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Vapour of higher boiling point fraction condense first in the lower part of the tower.

Vapours of lower boiling point fraction condense first in the lower part of tower.

Vapour of higher boiling point condense lather in the upper part of tower.

Vapours of higher boiling point never condense.

Which gas is used to destroy harmful bacteria in water?

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Iodine

Chlorine

Flourine

Bromine

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