SELECT * FROM question_mgmt as q WHERE id=3544 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=254 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Metals and Non-Metals samples of four metals a b c and d were taken an

Question:

Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.

Metal Iron(II) sulphate Cooper(II) sulphate Zinc sulphate Silver nitrate
A No reaction Displacement    
B Displacement   No reaction Displacement
C No reaction No reaction No reaction No reaction

Answer:

Explanation

A + FeSO4 → No reaction, because A is less reactive than iron

A + CuSO4 → Displacement, because A is more reactive than copper

B + FeSO4 → Displacement, because B is more reactive than iron

B + ZnSO4 → No reaction, because B is less reactive than zinc

C + FeSO4 → No reaction, because C is less reactive than iron

C + CuSO4 → No reaction, because C is less reactive than copper

C + ZnSO4 → No reaction, because C is less reactive than zinc

C + AgNO3 → Displacement, because C is more reactive than silver

D + FeSO4/CuSO4/ZnSO4/AgNO3 → No reaction, because D is less reactive than iron, copper, zinc, and silver

From the above equations, we get:

(i) B is the most reactive metal.

(ii) If B is added to a copper sulphate solution, then it would displace copper from its salt .

B + CuSO4 → Displacement

(iii) The arrangement of the metals in the order of decreasing reactivity is:

B > A > C > D


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