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.Management Sciences
Category: Group VA and VIA Elements
Compounds of nitrogen and phosphorus are mostly________________?
A. ionic
B. covalent
C. polar
D. all varieties are possible
Which one of following is not a property of pure quartz ?
A. Coloured solid
B. Brittle
C. Hard
D. All of above
The composition of brown ring in nitrate test is_________________?
A. FeSO4.No
B. FeSO4.No2
C. FeSO4.No3
D. FeSO4.N2o
Which of the elements show passivity when treated with conc. HNO3?
A. Fe
B. A
C. Cr
D. All of the above
In which compound nitrogen has maximum oxidation state____________________?
A. N2O
B. NO2
C. HNO2
D. HNO3
Arsenic oxides are removed by passing through_________________?
A. Ferric hydroxide
B. Sodium hydroxide
C. Calcium hydroxide
D. Aluminium hydroxide
Phosphorus is a Greek word and it means_________________?
A. Light bearing
B. Fire
C. Impure
D. Tetrahedral
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
A. Oxidation
B. Reduction
C. Decomposition
D. Both b & c
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