Which of the following is a saturated hydrocarbon?
A. Ethane
B. Benzene
C. Ethene
D. Propyne
Answer: Option A
Solution (By JKExamLibrary)
Ethane (C₂H₆) is an alkane with single bonds, thus saturated. Ethene (C₂H₄) is an alkene (double bond), propyne (C₃H₄) is an alkyne (triple bond), benzene (C₆H₆) has delocalized π electrons—all unsaturated. Saturated compounds contain only C-C single bonds and maximum possible hydrogen. They undergo substitution reactions.
Explanation:
Mendeleev arranged elements in order of increasing atomic mass, grouping those with similar properties. He left gaps for undiscovered elements. Modern table uses atomic number.
Explanation:
Gamma rays are high-energy photons emitted from the nucleus when it transitions from excited state to lower energy state. Alpha/beta decay often leaves nucleus in excited state which emits gamma.
Explanation:
Sodium lauryl sulfate (CH₃(CH₂)₁₁OSO₃Na) is a synthetic detergent with a sulfate group. Sodium stearate and potassium palmitate are soaps (carboxylate salts). Calcium oleate is soap scum.
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