MCQ
The oxidation number of hydrogen in $M{H_2}$is
- A$+ 1$
- ✓$-1$
- C$+2$
- D$-2$
✓
Answer
Correct option: B.
$-1$
(b)In all alkali and alkaline earth metal hydride hydrogen always shows $-1$ 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
If the work function of a metal is $6.63 \times 10^{-19}\, J$, the maximum wavelength of the photon required to remove a photoelectron from the metal is $....\,nm.$ (Nearest integer)
→[Given : $h =6.63 \times 10^{-34}\, J \,s$, and $c =3 \times 10^{8} \,m\, s ^{-1}$ ]
Which of the following heat of reaction expresses the bond energy of $HCl$
→Which of the following may exist in enantiomorphs
The enthalpy change $(\Delta H)$ for the reaction, $N_2 (g) + 3H_2 (g) \to 2NH_3(g)$ is $-92.38\, kJ$ at $298\, K$. The internal energy change $\Delta U$ at $298\, K$ is .............. $\mathrm{kJ}$
→Aspirin can be prepared by the reaction of
Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal $Ni(II).$ Which of the following statements is not true?
→For a homogeneous gaseous reaction $A\to 3B,$ if pressure after time $t$ was $P_t$ and after completion of reaction pressure was $P_\infty $ then select correct relation
→Which of the following has longest $C-O$ bond length? (Free $C-O$ bond length in $CO$ is $1.128\,\mathop A\limits^o $ )
→Iodine is formed when $ KI $ reacts with a solution of
→Product "$B$" is :
→