Question

104
Question Bank for HSLC Exam
(x
1
1
1
1
(xvii) When iron nails are kept in copper sul-
phate solution for 2-3 hours and then
taken out and washed. The colour of
iron nails be-
(a) Red
(b) brown
(c) black
(d) grey.
(xviii) Which of the following statements is not
correct when barium chloride solution
is mixed with sodium sulphate solution |
(a) It is a redox reaction
1
(b) It is a fast reaction
1
(c) It is a double displacement reaction
1
(d) It is a precipitation reaction.
1 (xix) Which of the following is a displace-
1
ment​

Answer 1

Answer:

brown

a)

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