Question # 1

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

Normal rain water is:

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weakly acidic

strongly acidic

weakly basic

strongly basic

The process of removing temporary hardness of water.

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Clark's method

Washing soda method

Sodium zeolite

Filteration method

Which gas is also known as life gas for plants.

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CO

CO₂

O₂

NO₂

Alkanes give reaction only

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Addition

Decomposition

Substitution

Displacement

Dynamic means, reaction is:

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In forward direction

Stop

In reverse direction

Still continuing.

Natural gas is 85% methane, It is used to make the follwing except.

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Carbon black

Ethane

Propane

Both b and c

Which one of the following salts makes the water permanently hard?

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NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

Global warming causes rising of the sea level. The cause of global warming is.

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CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

Which of the following in soluble in water.

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Organic acids

Glucose

Alcohal

All of them

The reaction between an acid and a base produces.

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Salts and water

Salt and gas

Salt and an acid

Salt and an base

Which acid is found in Ant sting?

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Citric Acid

Formic Acid

Uric Acid

Sulphuric acid

Freezing point of water is:

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-4°C

0°C

-36°C

-58°C

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