<h3>Answer:</h3>
Oxidation number refers to a number given to an atom which shows the number of number of electrons lost (or gained, if the number is negative), by an atom of that element in the compound.
Hence oxidation number of following atoms in given reaction are:
In NaOH:
Na = +1
O = -2
H = +1
In H2:
H = 0
HCl is considered as polar molecule and that is incorrect answer, The choices provided are A) HCl , B) CH₄ , C) H₂O, D) NH₃
And the correct answer is : B) CH₄
In case of H₂O and NH₃ the high difference in electronegativity between nitrogen or oxygen and hydrogen make the bonds acquire partial charges and become polar while in case of CH₄ the difference in electronegativity between carbon and hydrogen is only 0.4 so it considered as non-polar bond
also carbon connected from all directions with Hydrogens
The answer is A as they had to spend time growing or looking for food as food was scarce back then.
The correct answer would be <span>0.22 N.
Hope this helps.</span>
Answer:
Option C
Explanation:
The heat released by the system is absorbed by the surroundings, then only the heat will be balanced.
The surrounding heat increases and so to balance that heat the system releases heat so that it can cool down because heat is neither created nor destroyed.
This is the first law of thermodynamics.
