Welcome to your p block elements
1.
Hydrogen atoms attached to P in hypophosphorous acid:
2.
A hydride of nitrogen which is acidic:
3.
NH₄Cl heated → vapors turn litmus blue then red because of:
5.
“Pearl White” contains an element of VA group. The element used is:
6.
Which is used as fertilizer?
7.
The strongest reducing agent among the following is:
9.
In which compound is phosphorus in its lowest oxidation state?
10.
Lightning bolts in atmosphere cause the formation of:
11.
PCl₅ is possible but NCl₅ does not exist because:
12.
Process for separating white P from red P:
13.
In dilute aqueous solution, nitric acid exists as:
15.
Oxy acid forming hydride on heating:
16.
Dinitrogen trioxide is:
17.
Property shared by white & red phosphorus:
18.
P₂O₅ heated with water gives:
19.
vNaNO₂ gives coloured fumes with dil. acid. Fumes are:
20.
Standard electrode potential of which is highest positive?
21.
Which species undergoes reduction in MnO₂ + 4HCl → MnCl₂ + Cl₂ + H₂O?
22.
Which of the following does not exhibit allotropy?
23.
Dinitrogen trioxide is:
24.
Oxy acid forming hydride on heating:
25.
Which of the following is used as rocket fuel?
26.
In dilute aqueous solution, nitric acid exists as:
27.
Little difference in acidic strengths of H₃PO₄, H₃PO₃, H₃PO₂ because:
28.
Oxidation number of Mn in MnO₄²⁻?
29.
Which is NOT a redox reaction?
30.
The bonds present in N₂O₃ are:
31.
Industrial preparation of nitric acid (Ostwald process) involves:
32.
Oxy acid forming hydride on heating:
34.
The molecular nitrogen is not reactive due to:
35.
Iron with conc. HNO₃:
36.
N forms NCl₃ but P forms PCl₅ & PCl₃. Why?
37.
Ammonia reacts with sodium hypochlorite to give:
38.
Which of the following is used as rocket fuel?
39.
Which of the following is used in smoke screens?
40.
Molecular formula of white phosphorus:
41.
Which does NOT have N–N bond?
42.
In which compound is phosphorus in its lowest oxidation state?
43.
Red phosphorus is less reactive than yellow phosphorus because:
44.
Which of the following is used in smoke screens?
45.
Property shared by white & red phosphorus:
