Here we are providing NCERT solutions for CBSE Class 10 Science Chapter 2, Acids, Bases and Salts. All these model solutions have been prepared by the subject experts. These solutions will help you find the right approach to solve the NCERT questions and understand the criteria to write perfect answers in exams to grab high scores.
Some prominent features of Class 10 Science NCERT Solutions are:
- Each solution is framed in a way to involve the key concept.
- Solutions have been rechecked/ revised by subject experts.
- Each solution is strictly according to the guidelines followed in CBSE marking scheme for board exams.
Students may download all the NCERT Solutions for CBSE Class 10 Science chapter – Acids, Bases and Salts, in the form of PDF.
Some of the questions and their solutions from NCERT Solutions for Class 10: Acids, Bases and Salts, are as follows:
Q. Why should curd and sour substances not be kept in brass and copper vessels?
Sol. Curd and sour substances are acidic in nature. If we keep them in brass and copper vessels, metal of their container reacts with the acid and liberates hydrogen gas and harmful products. This results in spoiling of food.
Q. Why does dry HCI gas not change the colour of the dry litmus paper?
Sol. We know that, colour of the litmus paper is changed by the hydrogen ions and hydrogen ions can be generated in aqueous solution only. Dry HCl gas does not contain H+ ions. Therefore, the colour of the litmus paper does not change.
Q. Do basic solutions also have H+ ions? If yes, then why are these basic?
Sol. Yes, basic solution also has H+ ions but their concentration is less as compared to the concentration of OH ions. Thus, presence of more OH ions makes the solution basic.
Q. Compounds such as alcohols and glucose also contain hydrogen but are not characterized as acids. Describe an activity to prove it.
Sol. Two nails are fitted on a cork and are kept it in a 100 mL beaker. The nails are then connected to the two terminals of a 6-volt battery through a bulb and a switch. Some dilute HCI is poured in the beaker and the current is switched on. The same experiment is then performed with glucose solution and alcohol solution.
Observations: It will be observed that the bulb glows in the HCI solution and does not glow in the glucose solution.
Result: HCI dissociates into H and c1 ions. These ions conduct electricity in the solution resulting in the glowing of the bulb. On the other hand, the glucose solution does not dissociate into ions Therefore, it does not conduct electricity.
Conclusion: From this activity, it can be concluded that all acids contain hydrogen but not all compounds containing hydrogen are acids.
That is why, though alcohols and glucose contain hydrogen, they are not categorised as acids.
Get the complete the NCERT solutions for Class 10: Acids, Bases and Salts, from the following link:
Class 10 Science NCERT Chapter: Metals and Non-metals
Before solving the questions given in the Class 10 Science NCERT chapter- Acids, Bases and Salts, students should thoroughly read this chapter to grasp all the concepts explained in it. This will help you understand the problem discussed in a question and then come with an appropriate answer.
Main topics discussed in this chapter are:
- Chemical properties of acids and bases
- Acids and bases in the laboratory
- Strength of acid or base solutions
- Importance of pH in everyday life
- Details of different salts
Family of salts
pH of salts
- Chemicals from common salt
- Basic details about crystals
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