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The most reactive form of phosphorus is .......
a) red
b) yellow
c) violet
d) black
Which of the following hydrides does not exist?
b) PH5
c) AsH3
d) N2H4
a) NH3
Which of the following hydrides is thermally least stable?
b) PH 3
c) AsH3
d) SbH3
a) NH3
2NH 3 , the yield of ammonia is expected to be maximum
In the reaction N 3 + 3H 2 at .......
a) low temperature and low pressure
b) low temperature and high pressure
c) high temperature and low pressure
c) high temperature and high pressure
Highest oxidation state of nitrogen is achieved in .......
a) nitrogen dioxide
b) dinitrogen trioxide
c) dinitrogen tetroxide
d) dinitrogen pentoxide
Which of the following statements regarding ammonia is not correct?
a) Ammonia is a colourless and pungent smelling gas
b) Ammonia can be easily liquefied and solidified
c) Ammonia can act as Lewis acid
d) Ammonium chloride dissolves in liquid ammonia has acidic properties.
The gas liberated when copper reacts with dilute HNO3 is .......
c) N2O3
d) N2O5
a) NO
b) NO2
In the brown-ring test of nitrate ion, the compound formed is .......
b) [Fe(H2O)5NO]3+
a) [Fe(H2O)5NO]2+
c) [Fe(H2O)4(NO2)2+
d) [Fe(H2O)3(NO)3]2+
The aqua regia is .......
a) 3 parts conc. HNO3 + 1 part conc. HCl
b) 1 part conc. HNO3 + 3 parts conc. HCl
c) 2 parts conc. HNO3 + 2 parts conc. HCl
d) 2.5 parts conc. HNO3 + 0.5 part conc. HCl
Which of the following halides of nitrogen is expected to be most stable?
b) NCl3
c) NBr3
d) NI3
a) NF3
The order of stability of hydrides of Group 15 is .......
b) NH3 < PH3 < AsH3
a) NH3 > PH3 > AsH3
c) NH3 > PH3 < AsH3
d) NH3 < PH3 > AsH3
The laughing gas is .......
b) NO
c) NO2
d) N2O3
a) N2O
Pyrophosphorous acid is a .......
a) monobasic acid
b) dibasic acid
c) tribasic acid
d) tetrabasic acid
Unique Solutions ®
S.Y.J.C. Science - Chemistry - Part I