MCQ
Mischmetal is an alloy consisting mainly of
- ✓lanthanoid metals
- Bactinoid metals
- Cactinoid and transition metals
- Dlanthanoid and actinoid metals
✓
Answer
Correct option: A.
lanthanoid metals
a
Alloys of lanthanides with Fe are called Misch metal, which consists of a lanthanoid metal $(\sim 95 \%)$ and iron $(\sim 5 \%)$ and traces of $S , C , Ca$ and $Al$.
Alloys of lanthanides with Fe are called Misch metal, which consists of a lanthanoid metal $(\sim 95 \%)$ and iron $(\sim 5 \%)$ and traces of $S , C , Ca$ and $Al$.
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
For $p$-orbital, the magnetic quantum number has value
→Select the incorrect graph for velocity of $e^-$ in an orbit vs. $ Z, \frac {1}{n}$ and $n$
→A galvanic cell with electrode potential of $'A' = + 2.23\;V$ and $'B' = - 1.43\;V$. The value of $E{^o _{cell}}$ is .............. $\mathrm{V}$
→The oxidation number of $Mn$ in $MnO_4^{ - 1}$ is
→When the first electron gain enthalpy $(\Delta _{eg}H)$ of oxygen is $-141\,kJ/mol,$ its second electron gain enthalpy is
→Which one of the following is the correct set with respect to molecule, hybridization and shape?
Major product $(A)$ is
→Number of $\sigma$ and $\pi$ bonds present in ethylene molecule is respectively :
→Resistance of a conductivity cell (cell constant $129 \;m ^{-1}$ ) filled with $74.5\; ppm$ solution of $KCl$ is $100\; \Omega$ (labelled as solution 1). When the same cell is filled with $KCl$ solution of $149 \;ppm$, the resistance is $50\; \Omega$ (labelled as solution 2). The ratio of molar conductivity of solution $1$ and solution $2$ is i.e. $\frac{\wedge_{1}}{\wedge_{2}}=x \times 10^{-3}$. The value of $x$ is
→(Nearest integer)
Given, molar mass of $KCl$ is $74.5 g mol ^{-1}$
An atom has $x$ energy level, then total number of lines in its spectrum are
→