Welcome to your p block elements
1.
Hydrogen atoms attached to P in hypophosphorous acid:
2.
Ammonia reacts with sodium hypochlorite to give:
3.
Property shared by white & red phosphorus:
4.
Lightning bolts in atmosphere cause the formation of:
5.
Little difference in acidic strengths of H₃PO₄, H₃PO₃, H₃PO₂ because:
7.
Process for separating white P from red P:
8.
A hydride of nitrogen which is acidic:
9.
vNaNO₂ gives coloured fumes with dil. acid. Fumes are:
11.
The bonds present in N₂O₃ are:
12.
Which does NOT have N–N bond?
13.
N forms NCl₃ but P forms PCl₅ & PCl₃. Why?
14.
In which compound is phosphorus in its lowest oxidation state?
15.
In which compound is phosphorus in its lowest oxidation state?
16.
Red phosphorus is less reactive than yellow phosphorus because:
17.
Oxidation number of Mn in MnO₄²⁻?
18.
Which is used as fertilizer?
19.
The strongest reducing agent among the following is:
20.
The molecular nitrogen is not reactive due to:
21.
Which of the following is used in smoke screens?
22.
Oxy acid forming hydride on heating:
23.
Property shared by white & red phosphorus:
24.
Which of the following is used in smoke screens?
25.
Dinitrogen trioxide is:
26.
Which of the following does not exhibit allotropy?
28.
Oxy acid forming hydride on heating:
29.
NH₄Cl heated → vapors turn litmus blue then red because of:
30.
Molecular formula of white phosphorus:
31.
PCl₅ is possible but NCl₅ does not exist because:
32.
Industrial preparation of nitric acid (Ostwald process) involves:
33.
Oxy acid forming hydride on heating:
34.
Which species undergoes reduction in MnO₂ + 4HCl → MnCl₂ + Cl₂ + H₂O?
35.
Standard electrode potential of which is highest positive?
36.
Dinitrogen trioxide is:
37.
Which is NOT a redox reaction?
38.
In dilute aqueous solution, nitric acid exists as:
39.
P₂O₅ heated with water gives:
41.
In dilute aqueous solution, nitric acid exists as:
42.
“Pearl White” contains an element of VA group. The element used is:
43.
Which of the following is used as rocket fuel?
44.
Iron with conc. HNO₃:
45.
Which of the following is used as rocket fuel?
