Welcome to your p block elements
1.
N forms NCl₃ but P forms PCl₅ & PCl₃. Why?
2.
The strongest reducing agent among the following is:
3.
Which is used as fertilizer?
5.
Process for separating white P from red P:
6.
Hydrogen atoms attached to P in hypophosphorous acid:
7.
P₂O₅ heated with water gives:
8.
Ammonia reacts with sodium hypochlorite to give:
9.
Which is NOT a redox reaction?
10.
Oxy acid forming hydride on heating:
11.
Iron with conc. HNO₃:
12.
The molecular nitrogen is not reactive due to:
13.
In dilute aqueous solution, nitric acid exists as:
14.
Which of the following is used as rocket fuel?
16.
Oxy acid forming hydride on heating:
17.
Which of the following is used in smoke screens?
18.
In which compound is phosphorus in its lowest oxidation state?
19.
vNaNO₂ gives coloured fumes with dil. acid. Fumes are:
20.
A hydride of nitrogen which is acidic:
21.
“Pearl White” contains an element of VA group. The element used is:
22.
Lightning bolts in atmosphere cause the formation of:
24.
In which compound is phosphorus in its lowest oxidation state?
25.
Oxy acid forming hydride on heating:
26.
Dinitrogen trioxide is:
27.
Which of the following is used in smoke screens?
28.
NH₄Cl heated → vapors turn litmus blue then red because of:
29.
Red phosphorus is less reactive than yellow phosphorus because:
30.
PCl₅ is possible but NCl₅ does not exist because:
32.
Which of the following is used as rocket fuel?
33.
In dilute aqueous solution, nitric acid exists as:
34.
Property shared by white & red phosphorus:
35.
Which does NOT have N–N bond?
36.
Which species undergoes reduction in MnO₂ + 4HCl → MnCl₂ + Cl₂ + H₂O?
37.
Molecular formula of white phosphorus:
38.
Which of the following does not exhibit allotropy?
39.
Dinitrogen trioxide is:
40.
The bonds present in N₂O₃ are:
41.
Standard electrode potential of which is highest positive?
42.
Industrial preparation of nitric acid (Ostwald process) involves:
43.
Property shared by white & red phosphorus:
44.
Oxidation number of Mn in MnO₄²⁻?
45.
Little difference in acidic strengths of H₃PO₄, H₃PO₃, H₃PO₂ because:
