Catenation is the ability of an atom to form bonds with other atoms of the same element. Carbon has the highest catenation power among all elements. Carbon combines with other carbon atoms to form long chains or rings, this property is called catenation.

MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 4 - Carbon And Its Compounds>TEST YOURSELF>Q 14

HARD

10th CBSE

IMPORTANT

Earn 100

Hard water is not available for an experiment. Some salts are given below:
(i) Sodium chloride (ii) Sodium sulphate
(iii) Calcium chloride (iv) Calcium sulphate
(v) Potassium chloride (vi) Magnesium sulphate
Select from the following a group of these salts, each member of which may be dissolved in water to make it hard.

75% studentsanswered this correctly

Important Questions on Carbon And Its Compounds

EASY

10th CBSE

IMPORTANT

MODERN'S ABC+ OF SCIENCE CHEMISTRY>Chapter 4 - Carbon And Its Compounds>TEST YOURSELF>Q 15

2 mL

of ethanoic acid was taken in each of the test tube I and II. A red litmus paper was introduced in test tube I and a

pH

paper was introduced in test tube II. The experiment was performed by four students and they reported their observations as:

Student	Action in Test tube I	Action in Test tube II
I	turned blue	turned pink
II	turned blue	turned blue
III	remained unchanged	turned pink
IV	remained unchanged	turned blue

The correct set of observations is that of student: