Welcome to your p block elements
2.
In dilute aqueous solution, nitric acid exists as:
3.
vNaNO₂ gives coloured fumes with dil. acid. Fumes are:
4.
Dinitrogen trioxide is:
5.
A hydride of nitrogen which is acidic:
6.
Which of the following does not exhibit allotropy?
7.
Property shared by white & red phosphorus:
8.
In which compound is phosphorus in its lowest oxidation state?
9.
Process for separating white P from red P:
10.
NH₄Cl heated → vapors turn litmus blue then red because of:
11.
Standard electrode potential of which is highest positive?
12.
Dinitrogen trioxide is:
13.
In dilute aqueous solution, nitric acid exists as:
14.
“Pearl White” contains an element of VA group. The element used is:
15.
The bonds present in N₂O₃ are:
16.
Property shared by white & red phosphorus:
17.
Molecular formula of white phosphorus:
19.
Which of the following is used as rocket fuel?
20.
Which of the following is used in smoke screens?
21.
N forms NCl₃ but P forms PCl₅ & PCl₃. Why?
22.
P₂O₅ heated with water gives:
23.
Industrial preparation of nitric acid (Ostwald process) involves:
24.
Ammonia reacts with sodium hypochlorite to give:
25.
Iron with conc. HNO₃:
26.
Lightning bolts in atmosphere cause the formation of:
27.
The molecular nitrogen is not reactive due to:
28.
Which of the following is used in smoke screens?
29.
Red phosphorus is less reactive than yellow phosphorus because:
31.
Oxy acid forming hydride on heating:
32.
Little difference in acidic strengths of H₃PO₄, H₃PO₃, H₃PO₂ because:
33.
The strongest reducing agent among the following is:
34.
Which does NOT have N–N bond?
35.
In which compound is phosphorus in its lowest oxidation state?
37.
Oxy acid forming hydride on heating:
38.
Which species undergoes reduction in MnO₂ + 4HCl → MnCl₂ + Cl₂ + H₂O?
39.
Which is NOT a redox reaction?
40.
Which of the following is used as rocket fuel?
41.
Hydrogen atoms attached to P in hypophosphorous acid:
42.
Which is used as fertilizer?
43.
Oxy acid forming hydride on heating:
44.
PCl₅ is possible but NCl₅ does not exist because:
45.
Oxidation number of Mn in MnO₄²⁻?
