Which of the following sets of quantum numbers is impossible?
A. n=2, l=1, m=-1, s=-1/2
B. n=4, l=3, m=0, s=-1/2
C. n=1, l=0, m=0, s=+1/2
D. n=3, l=2, m=-3, s=+1/2
Answer: Option D
Solution (By JKExamLibrary)
The magnetic quantum number (m) can only take integer values ranging from -l to +l. For n=3, l can be 2 (a d-orbital). If l=2, the possible values for m are -2, -1, 0, +1, +2. The value m=-3 is outside this range, making this set of quantum numbers impossible.
Explanation:
C₂H₄ (ethene) is an alkene with a carbon-carbon double bond, thus unsaturated. The general formula CnH₂n indicates an alkene or cycloalkane. C₃H₈, C₄H₁₀, C₅H₁₂ follow CnH₂n+2 and are saturated alkanes. Unsaturated compounds undergo addition reactions, whereas saturated undergo substitution.
Explanation:
A homogeneous catalyst is in the same phase as the reactants. In the esterification of carboxylic acids with alcohols, liquid sulfuric acid (H2SO4) catalyzes the reaction between liquid reactants. Iron, platinum, and nickel are solid catalysts used for gaseous or liquid reactants, making them heterogeneous catalysts.
Explanation:
Reduction can be defined as loss of oxygen, gain of hydrogen, gain of electrons, or decrease in oxidation number. All are correct definitions.
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