MCQ
The colour of copper sulphide is
- ABlue
- ✓Black
- CRed
- DGreen
✓
Answer
Correct option: B.
Black
b
Copper sulphide is black in colour. $Cu^{2+}$ is placed in $II$ group of inorganic qualitative analysis. It is precipitated in the form of sulphide by passing $H_2S$ in presence of dil. $HCl$.
Copper sulphide is black in colour. $Cu^{2+}$ is placed in $II$ group of inorganic qualitative analysis. It is precipitated in the form of sulphide by passing $H_2S$ in presence of dil. $HCl$.
$C{{u}^{2+}}\,+\,{{H}_{2}}S\,\to \,\underset{\text{black}}{\mathop{CuS}}\,\,+\,2{{H}^{+}}$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following statements is correct
The basicity of aniline is less than that of cyclohexylamine. This is due to:
Given below are two statements:
→Statement $I$ : Aniline does not undergo Friedel-Crafts alkylation reaction.
Statement $II$ : Aniline cannot be prepared through Gabriel synthesis.
In the light of the above statements, choose the correct answer from the options given below:
The electrochemical equivalent of magnesium is $0.126\,mg/C$. A current of $5\, A$ is passed in a suitable solution for $1$ hour. The mass of magnesium deposited will be ........... $\mathrm{gm}$
→On heating glucose with Fehling's solution we get a precipitate whose colour is
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Electrophilic substitution reaction in phenol take place at
What will be major product of given reaction ?
By how much would the oxidising power of the $(MnO_4^- / Mn^{2+})$ couple change if the $H^+$ ion concentration is increased upto $100 \,times$ at $25\,^oC$ ?
→In which of the following compounds, nitrogen exhibits highest oxidation state?