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Unit 7: Acid Base Chemistry — Mcqs

9th Class Chemistry · Unit 7: Acid Base Chemistry

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1.Which acid is not used as a food or mixed with food?

2.While baking, which gas is responsible for raising the bread and making it soft?

3.Predict the main characteristics of the reactions of metals with acids.

4.How many hydroxide ions, calcium hydroxide will release in water?

5.In a neutralization reaction between KOH and H3PO4, how many molecules of KOH will react with one molecule of H3PO4?

6.Which acid is used in the preparation of soap?

7.Which compound is formed when SO2 is dissolved in water?

8.Which of the following contains oxalic acid?

9.Which compound in the following reaction is behaving as a conjugate base? CH3COOH(aq) + H2O(l) -> CH3COO-(aq) + H3O+(aq)

10.When a chemical reaction is carried out with a substance Z; a gas is produced which turns red litmus paper blue. What is the reaction?

11.A base is a substance which neutralizes an acid. Which of these substances is not a base?

12.Acetic acid is used for:

13.Acids means.

14.All acids turn blue litmus:

15.All bases turn red litmus:

16.Which of the following cannot be classified as Arrhenius acid?

17.Milk of magnesia contains Mg(OH)2. It is used as antacid. It neutralizes excess stomach acid. Which salt is formed in this reaction?

18.According to Arrhenius concept acid is a substance which dissociates in aqueous solution to give:

19.According to Arrhenius concept base is a substance which dissociates in aqueous solution to give:

20.Which one is not an Arrhenius base?

21.Which one is not an Arrhenius acid?

22.Which of the following is Bronsted base?

23.Ammonia is a base, because it

24.Consider the following reaction? H2O + HCl <=> H3O+ + Cl- . Which species is an proton acceptor in this reaction?

25.According to Bronsted and Lowry concept, an acid is a substance that can donate:

26.A substance which can behave as an acid as well as a base is called:

27.A reaction between an acid and a base produces:

28.Which acid is present in our stomach?

29.When acids react with metals, which gas is evolved?

30.When acids react with carbonates and bicarbonates, which gas is produced:

31.Alkalis react with ammonium salts to liberate:

32.Which is used to manufacture soap?

33.Acid rain has pH less than:

34.Caustic chemical drain cleaner are capable of dissolving: