How many unpaired electrons are there in Ni2+?
1) 2
2)
An element with atomic no. z = 11 emits Ka - X ray of wavelength l, then the atomic no. of
Two blocks are connected by a string as shown in the diagram. The upper block is hung by another
In the reaction sequence : $$\displaystyle CH_{3}-C\equiv C-H\xrightarrow{CH_{3}MgBr}CH_{4
