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WorksheetsXII CHEMISTRY -L:3 -p-BLOCK elements
Total questions: 10
Worksheet time: 5mins
Earth atmosphere has ............... % of dinitrogen (N2) gas.
72
78
75
76
Decomposition of sodium azide gives ...........
sodium hydroxide
soda ash
nitrogen
oxygen
Lithium (Li) reacts with nitrogen (N2) gives.................
Lithiumhydroxide (LiOH)
Lithium nitride (Li3N)
Lithium bromide (LiBr)
Dinitrolithium (N2Li)
Boron(B) reacts with nitrogen(N2)gives.................
boron nitride (BN)
boric acid(H3BO3)
borate radical (.B2H6)
Nitrogen (N2)
Nitrogen(N2) reacts with oxygen(O2)gives...........................
N2O
NO
NO2
HNO3
Ammonia(NH3) is prepared from ....................
UREA (NH2CONH2)
AMINE (RNH2)
Decomposition of ammonia(NH3 )gives ...............
Nitrogen (N2)& oxygen(O2)
Nitrogen (N2)& water(H2O)
Nitric acid(HNO3)
Hydrogen (H2) &Nitrogen (N2)
Ammonia (NH3)reacts wit hydrochloric acid HCl gives.....................
ammonium chloride (NH4Cl)
ammonium phosphate (NH3PO4)
ammonium hydroxide (NH4OH)
Ammonium sulphate (NH4(SO4)2
Molecular formula for nitric acid
HNO3
HNO2
HNO4
H2NO
Ammonia(NH3) has ................ lone pair of electrons
3
2
1
6
