Which of the following is a product of incomplete combustion of hydrocarbon?
A. CO₂
B. H₂O
C. CO
D. NaOH
Answer: Option C
Solution (By JKSSB Mock Tests)
Incomplete combustion due to insufficient oxygen produces carbon monoxide (CO) and/or soot (C). Complete combustion gives CO₂ and H₂O. CO is poisonous, binds to hemoglobin.
Explanation:
Ant sting contains formic acid (methanoic acid, HCOOH). It causes a burning sensation. It can be neutralized by applying a mild base like baking soda. Acetic acid is in vinegar, citric acid in lemons, lactic acid in curd.
Explanation:
Nuclear fission is a reaction in which the nucleus of a heavy atom (like Uranium-235 or Plutonium-239) splits into two or smaller, lighter nuclei when bombarded by a neutron, releasing a massive amount of energy and more neutrons, potentially causing a chain reaction.
Explanation:
Boiling converts soluble bicarbonates of Ca and Mg to insoluble carbonates: Ca(HCO₃)₂ (heat) → CaCO₃↓ + H₂O + CO₂, which can then be filtered. Permanent hardness (due to sulfates/chlorides) is not removed by boiling; requires washing soda, ion exchange, or calgon. Calcium sulfate addition would increase permanent hardness. Filtration removes solid particles, not dissolved ions.
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