MCQ Questions for Class 10 Science Acids, Bases and Salts with Answers
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1. When the stopper of a bottle containing colourless liquid was removed, the bottle gave a smell like that of vinegar. The liquid in the bottle could be
2. Which of the following is not a mineral acid?
3. Which among the following is not a base?
4. To protect tooth decay, one is advised to brush the teeth regulary. The ingredient of the paste which checks tooth decay is:
5. When two or more elements combine together chemically in a fixed ratio of mass, a ____________ is formed.
6. Indicator those small change in acidic or basic medium are called
7. Methyl Orange indicator shows which color in acidic and basic medium ?
8. Which of the following statements is correct ?
9. What is Alkalis ?
10. Bases react with non-metallic oxide to form salt and water. This is because non-metallic oxides are
11. What happens when a solution of an acid is mixed with a solution of a base in a test tube? (i) The temperature of the solution increases (ii) The temperature of the solution decreases (iii) The temperature of the solution remains the same (iv) Salt formation takes place
12. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
13. Two aqueous solutions P and Q have pH of 5 and 13 respectively. The correct inference is that:
14. The pH of a solution is 7. How can you increase its pH?
15. Sodium carbonate is a basic salt because it is a salt of
16. Which gas is evolved when acids react with metals?
17. A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish- blue?
18. Which of the following gives the correct increasing order of acidic strength?
19. If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
20. Farmers neutralise the effect of acidity of the soil by adding
21. A teacher gave two test tubes to the students, one containing water and the other containing sodium hydroxide. She asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for the identification?
22. One of the constituents of baking powder is sodium hydrogencarbonate, the other constituent is
23. Increase in the OH– ion concentration, leads to
24. Which of the following statements is correct about an aqueous solution of an acid and of a base? (i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid (iii) Lower the pH, stronger the base (iv) Lower the pH, weaker the base
25. A solution has turned the colour of red litmus paper to blue. The pH of the solution is approximately:
26. The pH of three solutions X, Y and Z is 6, 4 and 8 respectively. Which of the following is the correct order of acidic strength?
27. Which one of the following can be used as an acid-base indicator by a visually impaired student?
28. What is gastric acid present in the stomach composed of?
29. Which of the following is acidic in nature?
30. When the solution of an acid is diluted, what will be the change in pH of the solution?
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When the solution of an acid is diluted, what will be the change in pH of the solution?
ReplyDelete(pH of the solution remains the same) how this answer is correct
Deleteno brother this answer is wrong
Delete