You visited us 1 times! Enjoying our articles? Unlock Full Access!

Roasting

Which combina...

Question

Which combination cannot be used for thepreparation of hydrogen gas in the
laboratory?

I.Zn/conc.H $_{2}$ SO $_{4}$ (Impure Zinc is used)

II.Zn/dil.HNO $_{3}$ (Impure Zinc is used)

III.Zn/dil.H $_{2}$ SO $_{4}$ (Very highly pure Zn is used)

III only

No worries! We‘ve got your back. Try BYJU‘S free classes today!

I II and III

No worries! We‘ve got your back. Try BYJU‘S free classes today!

I and II

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

II only

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
I and II

Zn + 2H $_{2}$ SO $_{4}$ (conc.) $\to$ ZnSO $_{4}$ + 2H $_{2}$ O + SO $_{2}$

4Zn + HNO $_{3}$ $\to$ 4Zn(NO $_{3}$ ) $_{2}$ + N $_{2}$ O + 5H $_{2}$ O

The rate with which Zinc reacts with dilute H $_{2}$ SO $_{4}$ is too low to be feasible under laboratory conditions. Hence this is not a suitable method to prepare Hydrogen in laboratory.

Suggest Corrections

Similar questions

{Pb}_{3} O_{4} + 8 HCl Heat - - \to 3 {PbCl}_{2} + {Cl}_{2} + 4 H_{2} O

\begin{matrix} Column 1 & Column 2 & Column 3 (I) & Aluminium & (i) & Haematite & (P) & C u F e S_{2} (I I) & Iron & (i i) & Zinc blende & (Q) & A l O_{x} (O H)_{3 - 2 x} (I I I) & Copper & (i i i) & Bauxite & (R) & F e_{2} O_{3} (I V) & Zinc & (i v) & Copper pyrite & (S) & Z n S \end{matrix}

N a F (s)

N a_{(g)} \to N a_{(g)}^{+} + e^{-}

F_{(g)} + e^{-} \to F_{(g)}^{-}

N a_{(g)}^{+} + F_{(g)}^{-} \to N a F_{(s)}

C H_{3} C H_{2} O H + H C l a n h . Z n C l_{2} - ----- \to

C H_{3} C H_{2} O H + H C l \to

(C H_{3})_{3} C O H + H C l \to

(C H_{3})_{2} C H O H + H C l a n h . Z n C l_{2} - ----- \to

n^{3}

n^{2}

n^{3}

Join BYJU'S Learning Program