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Considering X axis as the internuvlear a...

Considering `X` axis as the internuvlear axis, which out of the following will form a sigma bond
(a) `1s` and `ls` (b) `ls ` and `2p_(x)`
(c ) `2p_(y)` and `2p_(y)` (d) `2p_(x)` and `2p_(y)`
(e) `1s` and `2s` .`

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(i) and (ii)
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Considering X-axis as the internucler axis, which out of the following atomic orbitals will from a sigma bond ? (a)1sand 1s" " (b) 1s and 2p_(x)" "(c )2p_(y)and2p_(y)" "(d)1s and2s.

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