Answer:
Coefficient of
is more than 4
Explanation:
Oxidation: 
- Balance charge:
......(1)
Reduction: 
- Balance Cr:

- Balance O and H in acidic medium:

- Balance charge:
.......(2)
gives balanced equation:

So coefficient of
is more than 4
The electronic configuration of n - 3 ion is [He] 2s2 2p3.
Nectar contains a high concentration of sucrose (sugar).
When hummingbirds ingest the nectar, their cells use oxygen to convert it into carbon dioxide and water.
The oxidation of sucrose releases a large amount of energy, which the birds can use for flapping their wings, etc.
Answer:
D
Explanation:
A and B are completely wrong and C is partial but D is the best option
Answer:
The boiling point of noble gas increases as you go down the group because the London dispersion forces increase.