Answer:
Option A
Explanation:
Standard molar entropy determines the randomness of a mole of substance. Thus, the larger and complex a molecule is, the larger will be its molar entropy.
The molar entropy of gases is higher than liquids which is turn is higher than solid.
Here , NO2 is a gas with higher complex structure (trigonal planar) than N2 (linerar), N2O (linear) and N2O2 (linear)
Hence, NO2(g) will have greatest standard molar entropy
Option A is correct
Answer : Oxidizing agent is
and Reducing agent is 
Explanation :
The given unbalanced redox reaction is,

In acidic medium, the balanced redox reaction is,

Oxidizing agent : Oxidizing agents are those agent which oxidizes other substance and itself get reduced.
Reducing agent : Reducing agents are those agent which reduces other substance and itself get oxidized.
In this redox reaction,
is an oxidizing agent and
is a reducing agent.
The redox reaction is also shown below.
Answer:
A person outside the bus, and a person on the bus.
Explanation:
Explanation:
atomic number.............