Welcome to your p block elements
1.
The molecular nitrogen is not reactive due to:
2.
Hydrogen atoms attached to P in hypophosphorous acid:
3.
Which is used as fertilizer?
4.
Which species undergoes reduction in MnO₂ + 4HCl → MnCl₂ + Cl₂ + H₂O?
6.
NH₄Cl heated → vapors turn litmus blue then red because of:
7.
Oxy acid forming hydride on heating:
8.
Industrial preparation of nitric acid (Ostwald process) involves:
9.
A hydride of nitrogen which is acidic:
10.
PCl₅ is possible but NCl₅ does not exist because:
11.
Iron with conc. HNO₃:
12.
Oxy acid forming hydride on heating:
13.
In which compound is phosphorus in its lowest oxidation state?
14.
Property shared by white & red phosphorus:
15.
Little difference in acidic strengths of H₃PO₄, H₃PO₃, H₃PO₂ because:
16.
P₂O₅ heated with water gives:
17.
In which compound is phosphorus in its lowest oxidation state?
18.
Oxy acid forming hydride on heating:
20.
Property shared by white & red phosphorus:
21.
Molecular formula of white phosphorus:
22.
In dilute aqueous solution, nitric acid exists as:
24.
Red phosphorus is less reactive than yellow phosphorus because:
25.
Which does NOT have N–N bond?
26.
Oxidation number of Mn in MnO₄²⁻?
27.
The bonds present in N₂O₃ are:
28.
vNaNO₂ gives coloured fumes with dil. acid. Fumes are:
29.
In dilute aqueous solution, nitric acid exists as:
30.
Which is NOT a redox reaction?
31.
Which of the following does not exhibit allotropy?
32.
Lightning bolts in atmosphere cause the formation of:
33.
Which of the following is used in smoke screens?
34.
“Pearl White” contains an element of VA group. The element used is:
35.
Dinitrogen trioxide is:
36.
Which of the following is used as rocket fuel?
37.
Which of the following is used as rocket fuel?
38.
Dinitrogen trioxide is:
40.
The strongest reducing agent among the following is:
41.
Ammonia reacts with sodium hypochlorite to give:
42.
Standard electrode potential of which is highest positive?
43.
N forms NCl₃ but P forms PCl₅ & PCl₃. Why?
44.
Which of the following is used in smoke screens?
45.
Process for separating white P from red P:
