Question

17.1 The most active metal is
(a) A
(b) B
(c) C
(d) D
17.2 The least reactive metal is
(a) A
(b) B
(c) C
(b) D
17.3 The increasing order of reactivity of metal A, B, C and D is
(a) A1B1C1D
(b) D1C1B1A
(c) D1 A1C1B
(d) D1C1A1B
17.4 Container of which metal can be used to store both zinc sulphate solution and silver nitrate solution?
(a) A
(b) C
(c) B
(d) D
17.5 The metal which shows the displacement with iron (II) Sulphate.
(a) A
(b) C.
(c) D
(d) B.​

Answer 1

Answer:

Each element of first column is the sum of two elements.

∴ Number of decompostions of C

1

​

=2=l (say)

Similarly, number of decompostions of C

2

​

=3=m (say)

Number of decompostions of C

3

​

=4=n (say)

∴ Total number decomposition of A is

∴l×m×n=2×3×4=24