# Class 10 Acid base and Salts Important questions-1

In this page we have Class 10 Science Acid base and Salts Important questions . Hope you like them and do not forget to like , social shar and comment at the end of the page.

## One Marks Questions

Question 1What is a neutralization reaction?

Question 2What will be the products of the following reaction?
HCI + NaOH

Question 3pH stands for the negative logarithm of the hydrogen ion concentration. True or false

Question 4Name two indicators which are widely used in laboratories.

Question 5What is brine?

Question 6A solution turns red litmus blue. Is the solution acid or a base?

Question 7What happens to the temperature of water when few drops of concentrated sulphuric acid is added to it?

Question 8Which compound of sodium is used for softening of hard water?

Question 9Does distilled water conduct electricity?

Question 10What are olfactory indicators? Give an example.
Question 11What is the chemical formula for baking soda
Question 12What is the organic acid present in tomato?

## Two Marks Questions

Question 1What are indicators?

Question 2What would happen if a small amount of copper oxide is taken in a beaker and dilute HCI is added to it?
Question 3What is the 'pH' of pure water and that of rain water? Elaborate it

Question 4How does plaster of Paris reacts with water? Write down the chemical equation?

Question 5What is dilute? Why care must be taken while mixing concentrated nitric acid or sulphuric acid with water?
Question 6On which factors does the strength of an acid or a base depend? Explain.
Question 7Name the common acid-base indicators used in the laboratory with their color change.

## Four Marks Questions

A) Explain the following by giving examples
1. How metal oxides react with acids?
2. How non- metal oxides react with base?

B) Explain the terms with examples
1. Acid Salt
2. Normal Salt
3. Basic salt
4. Double salt
5. Mixed salt

C) 1) Why does acidic solution conduct electricity?
2) Can basic solution conduct electricity?
3) Can separation of H+ ions in acids take place when HCI is added to a non- aqueous solution?
4) While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?

Five Marks Questions
Question 1 (a)What is pH scale and whatâ€™s its range? How is it related to hydronium ion concentration?
(b)Explain any two roles played by pH levels of various chemicals in living organisms.
Question 2 Plaster of Paris should be stored in a moisture-proof container. Explain why?

### Practice Question

Question 1 Which among the following is not a base?
A) NaOH
B) $NH_4OH$
C) $C_2H_5OH$
D) KOH
Question 2 What is the minimum resistance which can be made using five resistors each of 1/2 Ohm?
A) 1/10 Ohm
B) 1/25 ohm
C) 10 ohm
D) 2 ohm
Question 3 Which of the following statement is incorrect? ?
A) For every hormone there is a gene
B) For production of every enzyme there is a gene
C) For every molecule of fat there is a gene
D) For every protein there is a gene