Answer: (1) functional groups
Explanation:
Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.
The compounds having similar molecular formula but different arrangement of atoms or groups in space are called isomers and the phenomenon is called as isomerism.
Butanal is 
and butanone is 
.
and are functional isomers which have same molecular formula , similar masses and same number of carbon atoms per molecule but different functional groups attached.
The answer is the el second one since it is a physical change
<span>((P1V1/T1)=(P2V2/T2))</span>
The balanced reaction is as follows;
BiCl₂ + Na₂SO₄ --> 2NaCl + BiSO₄
this is a double displacement reaction
the oxidation number of Bi is +2 in both BiCl₂ and BiSO₄
oxidation number of Cl is -1 in both BiCl₂ and NaCl
oxidation number of Na is +1 in both Na₂SO₄ and NaCl
oxidation numbers of elements in SO₄²⁻ remains the same in both compounds.Therefore the oxidation state in any of the elements in the reaction doesn't change. Neither of the elements show an increase or decrease in the oxidation numbers .
Answer for this question is no element decreases its oxidation number.
Answer:
Equilibrium constant for the reaction at 25⁰C = 1.81 x 10⁻⁶
Explanation:
Reaction for the Haber's process
N₂(g) + 3 H₂(g) ⇌ 2 NH₃(g)
Free energy change of reaction
ΔGr° = ∑products free energy - ∑reactants free energy
= 2 x (- 16.4) - 0
= - 32.8 KJ / mole
Equilibrium constant for this reaction at 25⁰C
ΔGr° = - 2.303 RT log K
⇒ log K = 
⇒ K = Anti log( -5.74) = 1.81 x 10⁻⁶
