Chemistry - Study Mode
[#586] The gas produced in marshy places due to decomposition of vegetation is
Correct Answer
(D) Methane
Explanation
Solution: Methane gas is a hydrocarbon gas largely composed of methane formed when organic material or vegetation decays in the absence of air. Naturally occurring methane is mainly produced by the process of methanogenesis. It is also known as Swamp Gas.
[#587] Organic compounds are
Correct Answer
(A) Covalent compounds
Explanation
Solution: Organic compounds are covalent compounds.
[#588] Vinegar is an aqueous solution of
Correct Answer
(D) Acetic acid
Explanation
Solution: Vinegar is an aqueous solution of acetic acid and trace chemicals that may include flavorings. Vinegar typically contains 5–8% acetic acid by volume.
[#589] Two elements which can form a large number of compounds are
Correct Answer
(A) Carbon and Hydrogen
Explanation
Solution: The carbon-hydrogen bond (C-H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. Compound classes consisting solely of C-H bonds and C-C bonds are alkanes, alkenes, alkynes, and aromatic hydrocarbons. Collectively they are known as hydrocarbons.
[#590] Alcoholic (– OH) group can be identified by :
Correct Answer
(C) FeCl 3 Test
Explanation
Solution: As phenol is an aromatic alcohol, so FeCl 3 test is a test for alcohol and esterificaton test is also a test for alcohol. The ferric chloride test is used to determine the presence or absence of phenols in a given sample (for instance natural phenols in a plant extract).