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Intro to Chemical Engineering
Modern's ABC of Plus Chemistry
2308 SOLVED PROBLEMS
Question: 11A.CQ.15
What is liquid nitrogen used for ? ...
Verified Answer:
Liquid nitrogen is used as a refrigerant to preser...
Question: 11A.CQ.13
PCl5 is known but PI5 is not known. Why ? ...
Verified Answer:
Due to small size of Cl atom, five Cl atoms can be...
Question: 11A.CQ.11
Phosphoric acid has high viscosity and high melting point. Why ? ...
Verified Answer:
Phosphoric acid has a tendency to form hydrogen bo...
Question: 11A.CQ.10
Write the reaction of thermal decomposition of sodium azide. ...
Verified Answer:
Thermal decomposition of sodium azide gives nitrog...
Question: 11A.CQ.9
On being slowly passed through water, PH3 forms bubbles but NH3 dissolves. Why? ...
Verified Answer:
N—H bond in ammonia is more polar than P—H bond in...
Question: 11A.CQ.8
N2O supports combustion more vigorously than air. Explain. ...
Verified Answer:
N_2O
decomposes to give
O_2[...
Question: 11A.CQ.7
How is pyrophosphoric acid related to orthophosphoric acid? ...
Verified Answer:
Pyrophosphoric acid (
H_4P_2O_7
) is ...
Question: 11A.CQ.6
Determine the oxidation number of nitrogen in (i) N2O (ii) NO2 (iii) HNO3 (iv) NH3. ...
Verified Answer:
(i)
N_2O
: + 1 (ii) [...
Question: 11A.CQ.5
Why does not nitrogen form pentahalides like phosphorus ? ...
Verified Answer:
Nitrogen does not have vacant d-orbitals in its va...
Question: 11A.CQ.4
Concentrated nitric acid turns yellow on exposure to sunlight. Why ? ...
Verified Answer:
On exposure to sunlight, nitric acid decomposes in...
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