Which elements among the following would not produce hydrogen on treatment with caustic soda?
(i) Zn
(ii) Mg
(iii) AI
(iv) Cu
(v) Sn

i and ii

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ii and iv

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ii and v

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ii and iii

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Solution

The correct option is A ii and iv
There is no reaction of magnesium or copper with sodium hydroxide. On the other hand, zinc, aluminum and tin react with sodium hydroxide to produce hydrogen gas.

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Similar questions

Which of the following represent the correct Element and Symbol Pair?

(i) Cobalt –CO

(ii) Copper-Cu

(iii)Potassium- K

(iv) Calcium-C

(v) Silicon-Sl

(vi) Silver- Ag

(vii)Barium-Ba

(viii)Iron-Ir

What are the correct sets of Atomic masses (u) and Elements?

(i) N-14

(ii) Sulphur-34

(iii)Chlorine-36

(iv) Mg-24

(v) Cl-35.5

(vi) Oxygen-8

(vii)Na-23

Question 11
Which of the following metals exist in their native state in nature?
(i) $Cu$
(ii) $Au$
(iii) $Zn$
(iv) $Ag$

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

Question 11
Which of the following metals exist in their native state in nature?
(i) $Cu$
(ii) $Au$
(iii) $Zn$
(iv) $Ag$

(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)