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
111
What type of graph is obtained when 1/V is plotted against pressure at a constant temperature?
Answer:
Straight line
At constant temperature, the pressure of an ideal gas is inversely proportional to its volume. This inverse relationship results in a straight line when 1/V is plotted against pressure.
112
What type of molecule has the strongest carbon-carbon bond?
Answer:
Propane (CH3CH3)
The carbon-carbon bond strength in propane is maximum due to the presence of no double or triple bonds, resulting in a single bond that is relatively strong. This is in contrast to ethene and benzene, which have double and delocalized bonds respectively, and cyclohexane, which has single bonds but is part of a ring structure.
113
Which of the following substances is not crystalline in nature?
Answer:
Plastic
Crystalline substances have a repeating structure of atoms or molecules. Ice, diamond, and sucrose are crystalline solids with ordered structures. In contrast, plastic is typically an amorphous solid with a random molecular arrangement, making it non-crystalline.
114
Why does a liquid take the shape of its container?
Answer:
Liquid molecules can slide past each other.
Liquids are fluid because their molecules are not fixed in a rigid structure. They can move and flow, allowing the liquid to conform to the shape of its container.