Worksheetsp block elements
Total questions: 20
Worksheet time: 10mins
Nitrogen is chemically inert. Why?
Due to presence of double bond require more energy to break
Due to presence of triple bond require more energy to break
Triple bond requires less energy to break
None of the above
Bismuth forms stable compound in +3 state than in +5 state . Why?
(a)
Ammonia is liquid phosphene gas . Why?
Due to more molar mass ammonia has maximum vanderwall force of attraction
Due to more molar mass , ammonia has less vander wall force of attraction
Due to presence of inter molecular hydrogen bonding in ammonia
Due to absence of hydrogen bonding in ammonia
Nitric oxide is para magnetic
(a)
Nitrogen cannot exhibit co valancy more than four due to
Presence of vacant d orbitals
Due to large size
Due to absence of vacant d orbitals
Due to inert nature
Among the hydrides of 15th group , which is strong reducing agent?
Ammonia
Phosphine
Arsine
Bismuthine
Ammonia is a Lewis base and act as complexing agent.
It accepts electron pair
It is neither electron pair donar or acceptor
It act as electron pair donar.
It exhibit covalency more than five
- XeF6 on complete hydrolysis produces
XeOF 4
XeO2F 2
Xe O 3
Xe O 2
3.Among the following , which is the strongest oxidising agent?
Cl 2
F 2
Br 2
I 2
4.Which of the following is strongest acid among all ?
HI
HF
HBr
HCl
5.The shape of I F 7
T shape
trigonal bipyramidal
linear
pentagonal bipyramidal
The oxidation number of I in HIO 4
+4
+3
+ 7
+ 5
The colour of chorine gas
yellow
reddish brown
greenish yellow
violet
The correct order of acidic strength of hydrogen halides are
HF<HCl<HBr<HI
HF<HBr<HCl<HI
HI<HBr<HCl<HF
HI<HCl<HBr<HF
Pick out the correct statement
Chlorine water on standing loses its yellow colour due to the formation of HBr
Bleaching property of chlorine is due to the formation of nascent oxygen
Chlorine converts SO2 to SO3
The bleaching effect of chlorine is temporary.
The only one oxoacid of fluorine is
HOF2
HOFO
HOF
HOF3
The only one oxoacid of fluorine is
HOF2
HOFO
HOF
HOF3
In the interhalogen compound XX', which among the following statement is correct
X is larger halogen, X' is smaller halogen
X is smaller halogen, X' is larger halogen
Both X and X' are of the same size
Size of X and X' doesn't matter
When Cl2 and F2 are reacted in equal volumes, the product formed is
ClF2
ClF
ClF3
Cl2F
Sulphur in the vapour state is diamagnetic.
True
False
