12th Grade > Chemistry
P-BLOCK GROUP 15 - PNICTOGENS MCQs
Total Questions : 14
| Page 2 of 2 pages
Answer: Option A. -> NH3
:
A
We can look at the pKa table and see that NH3 is more stable than H2N−NH2.
:
A
We can look at the pKa table and see that NH3 is more stable than H2N−NH2.
:
PCl3+SO3→POCl3+SO2
The theoretical oxidation state of P in PCl3is+3isn’t it? It changes to +5 in Phosphoryl chloride.
Look at the oxidation states of Sulphur in SO3 and SO2. It is respectively +6 and +4. Hence PCl3 is a reducing agent and SO3 is an oxidizing agent.
Answer: Option D. -> All of these
:
D
Lead Heavy metal nitrates like copper (II) Nitrate or Lead (II) Nitrate decompose on heating to give the corresponding metal (II) oxide, nitrogen dioxide gas and dioxygen gas.
Pb(NO3)2→PbO+O2+NO2
:
D
Lead Heavy metal nitrates like copper (II) Nitrate or Lead (II) Nitrate decompose on heating to give the corresponding metal (II) oxide, nitrogen dioxide gas and dioxygen gas.
Pb(NO3)2→PbO+O2+NO2
Answer: Option C. -> N
:
C
This increase in atomic radii from N to Bi is due to the corresponding increase in the highest principal quantum number for each succeeding element. Thus option C is the correct one.
:
C
This increase in atomic radii from N to Bi is due to the corresponding increase in the highest principal quantum number for each succeeding element. Thus option C is the correct one.
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