Question Paper
Class / Subject: Class 10 (ICSE) · Chemistry
Chapter: Chapter 4 — Chapter 4: Analytical Chemistry - Use of Ammonium Hydroxide and Sodium Hydroxide
Time Allowed: 32 minutes
Max Marks: 16
1. What does NaOH form with metal salt solutions? [1]
(A) A coloured precipitate
(B) A colourless gas only
(C) No reaction
(D) An explosion
2. What colour precipitate forms with copper ions and NaOH? [1]
(A) Blue
(B) Red
(C) Green
(D) Black
3. What does NH4OH do with metal ions? [1]
(A) Forms precipitates
(B) Has no reaction
(C) Only dissolves them
(D) Only evaporates them
4. What does 'amphoteric' mean for zinc hydroxide? [1]
(A) It dissolves in excess NaOH
(B) It never dissolves
(C) It's always a gas
(D) It has no reaction with NaOH
5. Does iron hydroxide precipitate dissolve in excess NaOH? [1]
(A) No
(B) Yes
(C) Sometimes
(D) Always immediately
6. What is this systematic reagent approach used for? [1]
(A) Qualitative analysis of metal ions
(B) Quantitative mass calculations only
(C) Making fertilisers
(D) Making acids
7. Why is testing with excess reagent useful? [1]
(A) It helps distinguish between similar ions
(B) It has no use
(C) It always gives the same result
(D) It destroys the sample
8. Why study analytical chemistry techniques? [1]
(A) To identify substances systematically
(B) No reason
(C) It's not useful
(D) Only for tests
9. What does NaOH form with metal salt solutions? [1]
(A) A coloured precipitate
(B) A colourless gas only
(C) No reaction
(D) An explosion
10. What colour precipitate forms with copper ions and NaOH? [1]
(A) Blue
(B) Red
(C) Green
(D) Black
11. What does NH4OH do with metal ions? [1]
(A) Forms precipitates
(B) Has no reaction
(C) Only dissolves them
(D) Only evaporates them
12. What does 'amphoteric' mean for zinc hydroxide? [1]
(A) It dissolves in excess NaOH
(B) It never dissolves
(C) It's always a gas
(D) It has no reaction with NaOH
13. Does iron hydroxide precipitate dissolve in excess NaOH? [1]
(A) No
(B) Yes
(C) Sometimes
(D) Always immediately
14. What is this systematic reagent approach used for? [1]
(A) Qualitative analysis of metal ions
(B) Quantitative mass calculations only
(C) Making fertilisers
(D) Making acids
15. Why is testing with excess reagent useful? [1]
(A) It helps distinguish between similar ions
(B) It has no use
(C) It always gives the same result
(D) It destroys the sample
16. Why study analytical chemistry techniques? [1]
(A) To identify substances systematically
(B) No reason
(C) It's not useful
(D) Only for tests