Chemistry MCQs
Topic Notes: Chemistry
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
1
In solvent extraction, ether is used to separate products of organic synthesis from which substance?
Answer:
water
In solvent extraction, ether is employed to isolate organic compounds from a mixture. The process involves dissolving the compounds in an immiscible solvent, like ether, and separating the two liquids. In this context, ether is used to separate products of organic synthesis from water, as water is commonly used as the reacting medium in organic chemistry reactions.
2
What process involves a larger molecule with a higher molecular weight breaking down into smaller molecules with lower molecular weight?
Answer:
pyrolysis
Pyrolysis is a chemical reaction that involves the breakdown of larger molecules into smaller ones, often in the presence of heat, resulting in the formation of simpler compounds. This process is commonly used to analyze the composition of complex materials and can be applied in various fields such as chemistry and materials science.
3
The rate of reaction of organic compounds is slow due to
Answer:
covalent bonding
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4
Which sodium compound forms a white precipitate when reacted with barium chloride?
Answer:
Sodium carbonate
Sodium carbonate (Na2CO3) reacts with barium chloride (BaCl2) to form a white precipitate of barium carbonate, whereas the other options do not produce a similar reaction.
5
What is formed when SO2 reacts with Cl in sunlight?
Answer:
Sulphuryl chloride
Sulphur dioxide reacts with chlorine in the presence of sunlight to form sulphuryl chloride. This reaction involves the formation of a new compound by the reaction of two other compounds.
6
The reaction rates of organic compounds are often slow due to
Answer:
covalent bonding
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