MCQ
When the electron passes from energy state nearest to the nucleus to third energy level, it will :
- AEmit one quantum of energy
- ✓Absorb one quantum of energy
- CEmit two quantum of energy
- DAbsorb two quantum of energy
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$(A)$ In $B _{2} H _{6}$, all $B - H$ bonds are equivalent.
$(B)$ In $B _{2} H _{6}$ there are four $3-$centre$-2-$electron bonds.
$(C)$ $B _{2} H _{6}$ is a Lewis acid.
$(D)$ $B _{2} H _{6}$ can be synthesized form both $BF _{3}$ and $NaBH _{4}$.
$(E)$ $B _{2} H _{6}$ is a planar molecule.
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