HARD
10th CBSE
IMPORTANT
Earn 100

Identify the compound of calcium that is a yellowish-white powder and is used for disinfecting drinking water. How is it manufactured? Write the chemical equation for the reaction involved. What happens when it is left exposed to air?

Important Questions on Acids, Bases And Salts

MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE 2C>Q 18
Identify the compound of calcium that is used for plastering of fractured bones. With the help of a chemical equation, describe how this compound is prepared. What special precaution should be taken during the preparation of this compound?
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE 2C>Q 1
What is the name of compound CaSO4.12H2O. Is it possible to have half molecule of water? Explain how the above formula is correct.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE 2C>Q 1
What do you understand by the terms: (a) hydrated salt (b) water of crystallisation? Give one example of each.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE 2C>Q 2
Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for the removal of hardness of water and a gas C is evolved. The gas C when passed through lime water turns it milky. Identify A, B and C.
HARD
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE 2C>Q 2
In one of the industrial processes used for the manufacture of sodium hydroxide, a gas X is formed as a by-product. The gas X reacts with lime water to give a compound Y, which is used as a bleaching agent in the chemical industry. Identify X and Y giving the chemical equation of the reactions involved.
HARD
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE 2C>Q 3
A dry pellet of a common base B, when kept in open absorbs moisture and turns sticky. The compound is also a by-product of the chlor-alkali process. Identify B. What type of reaction occurs when B is treated with an acidic oxide? Write a balanced chemical equation for one such reaction.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE 2C>Q 3
A sulphate salt of Group 2 element of the Periodic Table is a white, soft substance, which can be moulded into different shapes by making its dough. When this compound is left in the open for some time, it becomes a solid mass and cannot be used for moulding purposes. Identify the sulphate salt and why does it show such a behaviour? Give the reaction involved.
MEDIUM
10th CBSE
IMPORTANT
Core Science Chemistry>Chapter 2 - Acids, Bases And Salts>EXERCISE 2C>Q 4

For making cake, baking powder is taken. If at home your mother uses baking soda instead of baking powder in cake.

How will it affect the taste of the cake and why?