MCQ
${M^{ + 3}}$ ion loses $3{e^ - }$. Its oxidation number will be
- A$0$
- B$+3$
- ✓$+6$
- D$-3$
✓
Answer
Correct option: C.
$+6$
(c) $2$ $×$ No. of ${e^ - }$ losses = Oxi. no.
$2 \times 3{e^ - } = + 6$.
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
The heat of neutralization of a strong acid and a strong alkali is $57.0 \,kJ\, mol^{-1}.$ The heat released when $0.5$ mole of $HNO_3$ solution is mixed with $0.2\,mole$ of $KOH$ is....$kJ$
→Ionisation energy in group $I-A$ varies in the decreasing order as
→Product $A$ in the reaction will be
→For an aqueous solution, the characteristic species of acid is
Which of the following pair has elements containing same number of electrons in the outermost orbit
Highest $pH =14$ is given by
→Answer the following by appropriately matching the lists based on the information given in the paragraph Consider the Bohr's model of a one-electron atom where the electron moves around the nucleus. In the following $List-I$ contains some quantities for the $n^{t /}$ orbit of the atom and $List-II$ contains options showing how they depend on $n$.
→Which of the following options has the correct combination considering $List-I$ and $List-II$?
| $List-I$ | $List-II$ |
| $(I)$ Radius of the $n^{\text {th }}$ orbit | $(P)$ $\propto n ^{-2}$ |
| $(II)$ Angular momentum of the electron in the $n^{\text {th }}$ orbit | $(Q)$ $\propto n ^{-1}$ |
| $(III)$ Kinetic energy of the electron in the $n^{\text {th }}$ orbit | $(R)$ $\propto n ^0$ |
| $(IV)$ Potential energy of the electron in the $n^{\text {th }}$ orbit | $(S)$ $\propto n ^1$ |
| $(T)$ $\propto n ^2$ | |
| $(U)$ $\propto n ^{1 / 2}$ |
($1$) Which of the following options has the correct combination considering $List-I$ and $List-II$?
$(1) (II), (R)$ $(2) (I), (P)$ $(3) (I), (T)$ $(4) (II), (Q)$
($2$) Which of the following options has the correct combination considering $List-I$ and $List-II$?
$(1) (III), (S)$ $(2) (IV), (Q)$ $(3) (IV),(U)$ $(4) (III), (P)$
Give the answer or quetion ($1$) and ($2$)
An element $(A)$ occurs in the short period having electronic configuration $ns^2\,np^1$. The formula of its oxide will be
→The value of $\Delta S$ for freezing of $10\,g$ of $H_2O(l)$ (enthalpy of fusion is $80 \, cal/g$) at $0\,^oC$ and $1\, atm$ pressure is.......$J/K$
→Zinc sulphate contains $22.65\%$ of zinc and $43.9\%$ of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce $20\, g$ of the crystals will be ............. $\mathrm{g}$
→