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
81
What is the anhydride of perchloric acid?
Answer:
Cl2O7
Perchloric acid (HCIO4) forms an anhydride, which is a compound formed by the removal of water. In this case, the anhydride is dichlorine heptoxide (Cl2O7), a highly reactive and unstable compound.
82
What is the pH of lemon juice?
Answer:
2
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
83
Which of the following are formed from glycerol and fatty acids?
Answer:
Triesters formed from glycerol and fatty acids
Animal and vegetable fats consist primarily of molecules called glycerol esters of fatty acids. In this case, the correct answer is 'Triesters formed from glycerol and fatty acids'. A trypester is a type of ester that has three fatty acid molecules attached to a single glycerol molecule.
84
Maximum temperature of the troposphere is
Answer:
17 °C
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
85
Which of the following is true about ozone?
Answer:
light blue in colour
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
86
What is the pH of distilled water?
Answer:
7
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
87
What happens if water-soluble vitamins are taken in excess?
Answer:
they are readily excreted from the body
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
88
What method is used to determine the molar mass of an organic acid?
Answer:
Volumetric method
The molar mass of an organic acid can be determined through a volumetric method, which involves titrating the acid with a strong base of known concentration. This method allows for the calculation of the acid's molar mass based on the volume of base required for neutralization.
89
Monosaccharides can contain
Answer:
3 to 6 carbon atoms
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
90
Ethanol can be converted into ethanoic acid by_________________?
Answer:
Oxidation
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.