MEDIUM
10th CBSE
IMPORTANT
Earn 100

A white powder is added while baking breads and cakes to make them soft and fluffy. What is the name of the powder? What are the main ingredients in it? What are the functions of each ingredient?

Important Questions on Acids, Bases and Salts

MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 2 - Acids, Bases and Salts>MOCK TEST>Q 14
A compound which is prepared from gypsum has the property of hardening when mixed with proper quantity of water. Identify the compound. Write chemical equation to prepare the compound. Write one important use of the compound.
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 2 - Acids, Bases and Salts>MOCK TEST>Q 15
Shobit takes cold drinks everyday. Cold drinks contain sugar and carbon dioxide which are dissolved in water along with preservative like sodium benzoate and carbonic acid. These dissolved substances present in cold drinks can cause tooth decay. It may also cause hyper acidity and weaken our bones. Shobit's teacher advised him to take nimbu pani (lemonade) and fresh fruit juice instead of cold drinks.
(i) Which acid is present in cold drinks?
(ii) What are the harmful effect of taking cold drinks?
(iii) What values are conveyed by the teacher when she suggested Shobit to take nimbu pani (lemonade) and fresh fruit juices instead of cold drinks?
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 2 - Acids, Bases and Salts>MOCK TEST>Q 16
A dry pellet of a common base 'X' when kept in open absorbs moisture and turns sticky. The compound is also a by-product of chlor-alkali process. Identify 'X', what type of reaction occurs when 'X' is treated with an acidic oxide? Write a balanced chemical equation for one such reaction.
EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 2 - Acids, Bases and Salts>MOCK TEST>Q 17
Explain why common salt becomes sticky during the rainy season.
EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 2 - Acids, Bases and Salts>MOCK TEST>Q 17
Blue vitriol changes to white on heating why?
EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 2 - Acids, Bases and Salts>MOCK TEST>Q 17
Anhydrous calcium chlorides is used in desiccator why?
EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 2 - Acids, Bases and Salts>MOCK TEST>Q 18
What do you observe when red litmus paper is introduced into a solution of sodium carbonate?
EASY
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 2 - Acids, Bases and Salts>MOCK TEST>Q 18
What do you observe when a drop of phenolphthalein is added to a solution of sodium hydroxide?