Ethene undergoes which type of reaction with bromine water? MCQ with Answer and Explanation

Ethene undergoes which type of reaction with bromine water?
A. Dehydration
B. Substitution
C. Oxidation
D. Addition
Answer: Option D
Solution (By JKSSB Mock Tests)
Ethene (C₂H₄) adds Br₂ across the double bond to form 1,2-dibromoethane. Bromine water decolorizes, a test for unsaturation. Alkanes undergo substitution.

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Question #1
Which of the following is an example of a synthetic detergent?
A. Sodium lauryl sulfate
B. Calcium oleate
C. Sodium stearate
D. Potassium palmitate

Correct Answer: Option A


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.

This question belongs to: Science chemistry
Question #2
The ability of metals to be drawn into thin wires is called:
A. Conductivity
B. Ductility
C. Malleability
D. Sonority

Correct Answer: Option B


Explanation:
Ductility is the property of metals by which they can be drawn into thin wires. Gold, silver, and copper are highly ductile. Malleability is the ability to be beaten into thin sheets. Sonority is the property of producing a ringing sound when struck. Conductivity refers to heat or electricity.

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Question #3
Washing soda is:
A. NaOH
B. NaHCO₃
C. CaOCl₂
D. Na₂CO₃·10H₂O

Correct Answer: Option D


Explanation:
Washing soda is sodium carbonate decahydrate (Na₂CO₃·10H₂O). Baking soda is NaHCO₃. Caustic soda is NaOH. Bleaching powder is CaOCl₂.

This question belongs to: Science chemistry