List of top Science Questions on Acids, Bases And Salts asked in CBSE Class X, CBSE Compartment X

Paddy fields require a large amount of water. The pesticides and chemical fertilizers used are washed down into the soil or waterbodies. How do these chemicals reach our bodies? What is this phenomenon known as?
How is a universal indicator obtained? How is the wide range of pH of solution tested by it?
What happens when ethanol is heated with alkaline KMnO$_4$? Write chemical equation involved.
Write structural formula and name of 4$^{th}$ member of alcohol homologous series.
Baking soda is used as an antacid.
While diluting an acid, it is recommended that the acid should be added to water.
Name the acid present in ant’s sting.
Give any two uses of it.
Assertion : Reaction of quick lime with water is an exothermic reaction. Reason (R): A large amount of heat is evolved on the reaction of quick lime and water.
Why regeneration is not possible in all the types of animals?
Besides sugarcane, give two more examples of plants that reproduce by this method.
Sugarcane does not produce seeds so name the process through which it will be able to reproduce.
Write two responses that enable the human body to be ready to deal with such situation.
Mention any one harmful effect of using plastic bags on the environment. Suggest better alternatives to the usage of plastic bags.

Observe the given figure and identify the labelled parts P, Q, R and S.

What are amphoteric oxides?
You have three aqueous solutions A, B and C as given below:
A - Potassium nitrate
B - Ammonium chloride
C - Sodium carbonate
The ascending order of the pH of these solutions is:
The water of crystallization is present in:
(i) Bleaching Powder
(ii) Plaster of Paris
(iii) Washing Soda
(iv) Baking Soda
Write chemical equations to show what happens when an acid reacts with a:
Write chemical equations to show what happens when an acid reacts with a:
(i) Metal
(ii) Base
(iii) Carbonate
Write the name of the main product formed in each case
Juice of tamarind turns blue litmus to red. It is because of the presence of a chemical compound called:
State the chemical property in each case on which the following uses of baking soda are based upon:
(i) As an antacid
(ii) As a constituent in making baking powder
(iii) In soda-acid fire extinguishers
Name and state in brief the process which is used to prepare sodium hydroxide from sodium chloride. In this process along with the main product two gases ‘X’ and ‘Y’ are also given off at the two electrodes. Name ‘X’ and ‘Y’ specifying the name of their respective electrode at which each gas is obtained. One of these gases when reacts with dry calcium hydroxide produces a compound ‘Z’ which is widely used in water treatment plants and textile industries. Name Z and write chemical equation for the reaction involved in its formation.
An aqueous solution of sodium chloride is prepared in distilled water. The pH of this solution is:
Select a pair of natural indicator from the following :
A chemical compound used in glass, soap and paper industries is