To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is
Common salt besides being used in kitchen can also beused as the raw material for making
(i) washing soda
(ii) bleaching powder
(iii) baking soda
Sodium carbonate Hydrated sodium carbonate(washing soda)
Which of the following statement is true?
This reaction is exothermic i.e. Heat is evolved
Which of the following statement regarding bases is false?
Basic solutions are conducting in nature. Conduction depends on the number of hydroxide ions produced when dissolved in water.
Why bases are kept in glass bottles?
Calamine solution contains
pH of human body varies within the range of
On which of the following acid rain has adverse effects?
Acid rain effects all of them. Acid rain corrodes historical monuments and marble structures. Acid rain alter the pH of water bodies by making it more acidic thus affects acquatic plants and animals.
Vinegar is acetic acid and baking soda is sodium hydrogen carbonate (a base). Whenever an acid reacts with a metal carbonate it produces carbon dioxide gas.
Natural indicator litmus is extracted from
Natural indicator is obtained from lichens and is purplein colour. It turns acidic solution red and basic solution blue.