Aromatic compounds burn with a sooty flame because _?

D. They have a high percentage of carbon

A. They have a high percentage of nitrogen

B. They have a high percentage of hydrogen

C. They have a high percentage of oxygen

D. They have a high percentage of carbon

Everyday Science · Atoms, Elements & Compounds · page 17 of 20

Compounds MCQs with Answers

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Compounds MCQs (161–170)

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Past paper MCQs in this chapter · See all past papers

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161.
Empirical formula of Glucose is _?
Correct Answer: A. CH2O
One-liner
The empirical formula of Glucose is CH2O.
162.
Aromatic compounds burn with a sooty flame because _?
Correct Answer: D. They have a high percentage of carbon
One-liner
Aromatic compounds burn with a sooty flame because they have a high percentage of carbon.
163.
Which of the following is NOT a compound?
Correct Answer: C. Milk
One-liner
Milk is NOT a compound; it is a mixture of water, fats, proteins, lactose, and minerals.
164.
The I.U.P.A.C name of Adipic acid is ?
Correct Answer: A. Hexane—1, 6–dioic acid
One-liner
The IUPAC name of Adipic acid is Hexane—1, 6–dioic acid.
165.
C₆H₁₂ is ?
Correct Answer: C. Cycloalkane
One-liner
C₆H₁₂ is a Cycloalkane because it follows the general formula CₙH₂ₙ, which is characteristic of cycloalkanes.
166.
Which one is not an organic compound?
Correct Answer: C. Water
One-liner
Water is not an organic compound because it lacks carbon.
167.
How much calcium is present in 0.1 g of CaCO₃?
Correct Answer: C. 0.04 g
One-liner
0.1 g of CaCO₃ contains 0.04 g of calcium.
168.
What is the mass of 1 mole of calcium carbonate (CaCO3)?
Correct Answer: A. 100 g
One-liner
The mass of 1 mole of calcium carbonate (CaCO3) is 100 g.
169.
An example of a polar covalent bond is:
Correct Answer: D. H-Cl
One-liner
An example of a polar covalent bond is H-Cl (hydrogen chloride), where electrons are shared unequally between hydrogen and chlorine atoms.
170.
Which atoms are found in methane?
Correct Answer: A. 1 carbon and 4 hydrogen
One-liner
Methane contains 1 carbon and 4 hydrogen atoms, giving it the chemical formula CH₄.

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Compounds MCQs with Answers

Compounds MCQs (161–170)

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