Welcome to your p block elements
1.
Which species undergoes reduction in MnO₂ + 4HCl → MnCl₂ + Cl₂ + H₂O?
2.
Which of the following is used as rocket fuel?
3.
vNaNO₂ gives coloured fumes with dil. acid. Fumes are:
4.
Process for separating white P from red P:
5.
P₂O₅ heated with water gives:
6.
Oxy acid forming hydride on heating:
7.
Red phosphorus is less reactive than yellow phosphorus because:
8.
The strongest reducing agent among the following is:
9.
N forms NCl₃ but P forms PCl₅ & PCl₃. Why?
10.
“Pearl White” contains an element of VA group. The element used is:
11.
A hydride of nitrogen which is acidic:
12.
Which is NOT a redox reaction?
13.
In which compound is phosphorus in its lowest oxidation state?
14.
The molecular nitrogen is not reactive due to:
15.
Industrial preparation of nitric acid (Ostwald process) involves:
16.
Iron with conc. HNO₃:
17.
Oxidation number of Mn in MnO₄²⁻?
19.
Which of the following is used as rocket fuel?
20.
Which of the following does not exhibit allotropy?
21.
The bonds present in N₂O₃ are:
23.
PCl₅ is possible but NCl₅ does not exist because:
24.
Property shared by white & red phosphorus:
25.
Which of the following is used in smoke screens?
27.
Standard electrode potential of which is highest positive?
28.
Oxy acid forming hydride on heating:
29.
In dilute aqueous solution, nitric acid exists as:
30.
Little difference in acidic strengths of H₃PO₄, H₃PO₃, H₃PO₂ because:
31.
Molecular formula of white phosphorus:
32.
Ammonia reacts with sodium hypochlorite to give:
33.
Lightning bolts in atmosphere cause the formation of:
34.
Hydrogen atoms attached to P in hypophosphorous acid:
35.
Property shared by white & red phosphorus:
36.
Which does NOT have N–N bond?
37.
Dinitrogen trioxide is:
38.
Oxy acid forming hydride on heating:
39.
Dinitrogen trioxide is:
41.
In which compound is phosphorus in its lowest oxidation state?
42.
Which of the following is used in smoke screens?
43.
NH₄Cl heated → vapors turn litmus blue then red because of:
44.
Which is used as fertilizer?
45.
In dilute aqueous solution, nitric acid exists as:
