Which one of following is not a property of pure quartz ?
A. Coloured solid
B. Brittle
C. Hard
D. All of above
Group VA and VIA Elements
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
A. Oxidation
B. Reduction
C. Decomposition
D. Both b & c
The most electronegative element among the following is_________________?
The most electronegative element among the following is_________________?
A. Sb
B. N
C. As
D. P
Which one of the followings possesses melting point below 0°C?
Which one of the followings possesses melting point below 0°C?
A. Nitrogen
B. Phosphorus
C. Carbon
D. Bismuth
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
A. an acid
B. a dehydrating agent
C. an oxidizing agent
D. as sulphonating agent
Arsenic oxides are removed by passing through_________________?
Arsenic oxides are removed by passing through_________________?
A. Ferric hydroxide
B. Sodium hydroxide
C. Calcium hydroxide
D. Aluminium hydroxide
Oxygen and sulphur resemble in all except________________?
Oxygen and sulphur resemble in all except________________?
A. Electronic conviguration of valence shell electrons
B. Show allotropy
C. Polymeric
D. Show same oxidation state
The chemical composition of cinnabar is__________________?
The chemical composition of cinnabar is__________________?
A. ZnS
B. PbS
C. HgS
D. FeS
Which allotropic form of phosphorous is the most stable ?
Which allotropic form of phosphorous is the most stable ?
A. White
B. black
C. red
D. Violet
All the elements in group VIA are ___________________ in nature?
All the elements in group VIA are ___________________ in nature?
A. hygroscopic
B. metals
C. polymeric
D. all of above