MCQ
The ionic charges on chromate ion and dichromate ion respectively is:
- A-2, -2
- B-3, -2
- C-2, -4
- D-4, -2
✓
Answer
- -2, -2
Explanation:
Chromate salts contain the chromate anion, $\text{CrO}^{2-}_4$ with -2 ionic charge.
Dichromate salts contain the dichromate anion, $\text{CrO}^{2-}_7$ with -2 ionic charge.
They are oxoanions of chromium in the +6 oxidation state.
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
Element showing the highest number of oxidation states is :
_____________ is prepared on a large seals from water gas.
Which is the correct increasing order of boiling points of the following compounds- $CH _3 OCH _3$, $CH _3 CH _2 OH$ and $CH _3 CH _2 CH _3$.
→Two containers, X and Y at 300K and 350K with water vapour pressures 22mm and 40mm respectively a are connected, initially closed with a valve. If the valves opened.
The following experimental rate data were obtained for a reaction carried out at $25^{\circ} C$ :
$
A_{(g)}+B_{(g)} \rightarrow C_{(g)}+D_{(g)}
$
→$
A_{(g)}+B_{(g)} \rightarrow C_{(g)}+D_{(g)}
$
| Initial [A(g)]/mol dm-3 | Initial [B(g)]/mol dm-3 | Initial rate/mol dm-3S-1 |
| 3.0 x 10-2 | 2.0 × 10-2 | 1.89 x 10-4 |
| 3.0 x 10-2 | 4.0 × 10-2 | 1.89 x 10-4 |
| 6.0 x 10-2 | 4.0 x 10-2 | 7.56 × 10-4 |
Anisole can be prepared by the action of methyl iodide on sodium phenate. The reaction is called
In the following compounds, the decreasing order of basic strength will be:
Transition state structure of the substrate formed during an enzymatic reation is:
When Benzene diazonium chloride reacts with phenol, it forms a dye. This reaction is called
IUPAC name of the compound is:
