Download App

STD 12 - 4. d and f- block elements — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 4. d and f- block elements4 Marks
MCQ
Copper sulphate solution reacts with $KCN$ to give
  • A
    $Cu{(CN)_2}$
  • B
    $CuCN$
  • C
    ${K_2}[Cu{(CN)_4}]$
  • ✓
    ${K_3}[Cu{(CN)_4}]$
✓

Answer

Correct option: D.
${K_3}[Cu{(CN)_4}]$
d
(d) $CuS{O_4} + 2KCN \to Cu{(CN)_2} + {K_2}S{O_4}$

$2Cu{(CN)_2} \to C{u_2}{(CN)_2} + {(CN)_2}$

$C{u_2}{(CN)_2} + 6KCN \to 2{K_3}[Cu{(CN)_4}]$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which electron is associated with the least energy
→
$17.0\, g$ of $NH _{3}$ completely vapourises at $-33.42^{\circ} C$ and $1\, bar$ pressure and the enthalpy change in the process is $23.4 \,k\,J\, mol ^{-1}$. The enthalpy change for the vapourisation of $85 g$ of $NH _{3}$ under the same conditions is $.....\, kJ .$
→
Which statement is wrong regarding osmotic pressure $(P), $ volume $  (V)$  and temperature $  (T)$
→
Calcium carbide + heavy water $ \to$ ?
The product of the above reaction is
→
Consider the hypothetical situation where the azimuthal quantum number, $l$, takes values $0$ , $1,2, \ldots \ldots n+1,$ where $n$ is the principal quantum number. Then, the element with atomic number
→
The reaction, $X + 2Y + Z \to  N$ occurs by the following mechanism

$(i)$ $X + Y  \rightleftharpoons  M$             very rapid equilibrium

$(ii)$ $M + Z \to  P$                        slow

$(iii)$ $O + Y \to  N$                       very fast

What is the rate law for this reaction

→
The correct sequence of ligands in the order of decreasing field strength is:
→
Which of the following has been arranged in increasing order of size of the hybrid orbitals ?
→
The heat of solution of anhydrous $\mathrm{CuSO}_4$ and $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ are $-70 \mathrm{~kJ} \mathrm{~mol}^{-1}$ and $+12 \mathrm{~kJ} \mathrm{~mol}^{-1}$ respectively.

The heat of hydration of $\mathrm{CuSO}_4$ to $\mathrm{CuSO}_4 \cdot 5 \mathrm{H}_2 \mathrm{O}$ is $-\mathrm{xkJ}$. The value of $\mathrm{x}$ is. . . . . . . 

→
Assertion : Atoms can neither be created nor destroyed.
Reason : Under similar condition of temperature and pressure, equal volume of gases does not contain equal number of atoms.
→