MCQ
Name the hydrocarbon that is a liquid at $STP$
- AEthane
- BPropane
- C$n-$ butane
- ✓$n-$ pentane
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$(A)$ $\left[ Ni \left( H _{2} O \right)_{2}( en )_{2}\right]^{2+}$
$(B)$ $\left[ Ni \left( H _{2} O \right)_{4}(\text { en })\right]^{2+}$ and
$(C)$ $\left[ Ni ( en )_{3}\right]^{2+}$ is ...... .
$[$ Given $: \sqrt{3}=1.73, \sqrt{2}=1.41]$