Welcome to your p block elements
1.
The molecular nitrogen is not reactive due to:
2.
Process for separating white P from red P:
3.
Oxy acid forming hydride on heating:
4.
vNaNO₂ gives coloured fumes with dil. acid. Fumes are:
5.
Dinitrogen trioxide is:
6.
Which of the following is used in smoke screens?
7.
Oxy acid forming hydride on heating:
8.
In dilute aqueous solution, nitric acid exists as:
9.
Which of the following does not exhibit allotropy?
10.
The strongest reducing agent among the following is:
11.
The bonds present in N₂O₃ are:
12.
Oxidation number of Mn in MnO₄²⁻?
13.
Industrial preparation of nitric acid (Ostwald process) involves:
15.
In which compound is phosphorus in its lowest oxidation state?
16.
Dinitrogen trioxide is:
17.
Which species undergoes reduction in MnO₂ + 4HCl → MnCl₂ + Cl₂ + H₂O?
18.
P₂O₅ heated with water gives:
19.
Which is NOT a redox reaction?
20.
Molecular formula of white phosphorus:
21.
Which of the following is used as rocket fuel?
23.
Standard electrode potential of which is highest positive?
24.
Property shared by white & red phosphorus:
25.
Property shared by white & red phosphorus:
26.
Which does NOT have N–N bond?
29.
PCl₅ is possible but NCl₅ does not exist because:
30.
Oxy acid forming hydride on heating:
31.
Which is used as fertilizer?
32.
A hydride of nitrogen which is acidic:
33.
N forms NCl₃ but P forms PCl₅ & PCl₃. Why?
34.
In which compound is phosphorus in its lowest oxidation state?
35.
Little difference in acidic strengths of H₃PO₄, H₃PO₃, H₃PO₂ because:
36.
Iron with conc. HNO₃:
37.
Which of the following is used as rocket fuel?
38.
NH₄Cl heated → vapors turn litmus blue then red because of:
39.
In dilute aqueous solution, nitric acid exists as:
40.
Red phosphorus is less reactive than yellow phosphorus because:
41.
“Pearl White” contains an element of VA group. The element used is:
42.
Which of the following is used in smoke screens?
43.
Lightning bolts in atmosphere cause the formation of:
44.
Ammonia reacts with sodium hypochlorite to give:
45.
Hydrogen atoms attached to P in hypophosphorous acid:
