MCQ
Transition elements form binary compounds with halogens. Which of the following elements will form MF3 type compounds?
- ACr
- BCo
- CCu
- DNi
✓
Answer
- Cr
- Co
Explanation:
Cr and Co form MF3 type of compounds. The ability of fluorine to stabilize the highest oxidation state is due to higher lattice energy in CoF3 and higher bond enthalpy for the higher covalent compound like CrF6.
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 aldehydes give red precipitate with Fehling solution ?
Chlorine water on standing loses its colour and forms
${H_3}P{O_2}$ is the formula for one of the phosphorus acid. Its name and basicity are respectively
→Arrange given amines in decreasing order of their basicity?
Primary and secondary amines are distinguished by
→$(i)$ Hinsberg test
$(ii)$ Carbyl amine test
$(iii)$ Hofmann mustard oil test
$(iv)$ $HNO_2$ test
Calculate the half life $(t_{1/2})$ and completion time $(T)$ for a zero order reaction if $K = 0.001 \frac{mol}{L/ \sec}$ and initial concentration $(a) = 1\, M.$
→$50\,g$ of antifreeze (ethylene glycol) is added to $200\,g$ water. What amount of ice will separate out at $-9.3\,^oC.$ $(K_f = 1.86\,K\,Kg\,mol^{-1}$ )
→The $pH $ at which maximum hydrate is present in an solution of oxaloacetic acid
→$\begin{align}
\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,|| \\
H-O-C-C- \\
\end{matrix}\begin{matrix}
O\,\, \\
||\,\,\, \\
C{{H}_{2}}-C-O-H \\
\end{matrix} \\
p{{K}_{a}}=2.2\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,p{{K}_{a}}=3.98 \\
\end{align}$
To purify fluorine gas, fumes of $HF$ are removed by
→Assertion : Fluorine exists only in $-\,1$ oxidation state.
→Reason : Fluorine has $2s^2\,2p^5$ configuration.