The isoelectronic set of ions is :
Li+, Na+, O2- and F-
N3-, O2-, F- and Na+
F-, Li+, Na+ and Mg2+
N3-,Li+, Mg2+ and O2-
Magnesium powder burns in air to give:
Mg (NO3)2 and Mg3N2
MgO and Mg3N2
MgO only
MgO and Mg(NO3)2
A hydrated solid X on heating initially gives a monohydrated compound X,Y upon heating above 373 K leads to an anhydrous white powder Z , X and Z respectively are :
Baking soda and dead burnt plaster.
Baking soda and soda ash
Washing soda and dead burnt plaster
Washing soda and soda ash
D.
Washing soda and soda ash
The correct statements among (a) to (d) are:
a) Saline hydrides produce H2 gas when reacted with H2O
b) Reaction of LiAlH4 with BF3 leads to B2H6
c) PH3 and CH4 are electrons- rich and electron- precise hydrides, respectively.
d) HF and CH4 are called as molecular hydrides.
a, b, c and d
a, b and c only
a, c and d only
c and d only