EASY

Earn 100

Define the following.
Efflorescence.

Important Questions on Water

MEDIUM

Science>Chemistry>Water>Chemical properties of water

Sodium reacts with water to form _____ gas.

HARD

Science>Chemistry>Water>Chemical properties of water

The correct statement is, iron reacts with:

EASY

Science>Chemistry>Water>Chemical properties of water

Define: ‘water of crystallisation’. Give two examples with formulae.

MEDIUM

Science>Chemistry>Water>Chemical properties of water

What product is formed when calcium reacts with water? What is it commonly known as? Give an equation for the reaction.

MEDIUM

Science>Chemistry>Water>Chemical properties of water

Give one word or a phrase for the following statements.
The property by which certain hydrated salts, when left exposed to the atmosphere, lose their water of crystallisation and crumble into powder.

EASY

Science>Chemistry>Water>Chemical properties of water

Give reason for Silica gel pouches are kept in unused water bottle.

MEDIUM

Science>Chemistry>Water>Chemical properties of water

Give reason for the following.
When sodium reacts with water, some flames are seen on the surface of water.

EASY

Science>Chemistry>Water>Chemical properties of water

Give two examples for the following Efflorescent substance.

MEDIUM

Science>Chemistry>Water>Chemical properties of water

State one relevant observation for each of the following.
Anhydrous calcium chloride is exposed to air for some time.

EASY

Science>Chemistry>Water>Chemical properties of water

Name the gas produced when steam is passed over hot coke.

EASY

Science>Chemistry>Water>Chemical properties of water

Give a suitable chemical term for
The process in which a substance absorbs moisture from the atmospheric air to become moist and ultimately dissolves in the absorbed water.

MEDIUM

Science>Chemistry>Water>Chemical properties of water

Deliquescence takes place because of the difference in (i)_____ of atmospheric (ii) _____and that of the deliquescent substance. The vapour pressure of atmospheric humidity is (iii) _____ than that of the deliquescent substance. The substances which take up water on exposure to the atmosphere, without forming a solution are known as (iv) _____substances.

EASY

Science>Chemistry>Water>Chemical properties of water

Name the gas produced when chlorine is dissolved in water and exposed to sunlight.

MEDIUM

Science>Chemistry>Water>Chemical properties of water

Silica gel packets used in bottles helps to absorb moisture from bottles.

EASY

Science>Chemistry>Water>Chemical properties of water

Give two examples of the following Drying agent.

MEDIUM

Science>Chemistry>Water>Chemical properties of water

Pure water does not conduct electricity.