JEE Main 2020 — D And F Block Elements Question with Solution
From: JEE Main 2020 (Online) 9th January Evening Slot
Question
5 g of zinc is treated separately with an excess
of
(a) dilute hydrochloric acid and
(b) aqueous sodium hydroxide.
The ratio of the volumes of H2 evolved in these two reactions is :
(a) dilute hydrochloric acid and
(b) aqueous sodium hydroxide.
The ratio of the volumes of H2 evolved in these two reactions is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B1 : 1
Step-by-step explanation
Zn + 2dil. HCl ZnCl2 + H2
Zn + 2NaOH Na2ZnO2 + H2
From one mole of Zn, 1 mol of H2 is produced by both NaOH and HCl.
The ratio of the volume of H2 is 1 : 1
Zn + 2NaOH Na2ZnO2 + H2
From one mole of Zn, 1 mol of H2 is produced by both NaOH and HCl.
The ratio of the volume of H2 is 1 : 1
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