Chemistry - Study Mode
[#581] The gas used for artificial fruit ripening of green fruit is –
Correct Answer
(A) Ethylene
Explanation
Solution: Some gases can speed up the ripening process of fruits. Farmers and sellers sometimes use this to make fruits ready for sale quicker. Out of the options given, ethylene is the gas commonly used for artificial fruit ripening. It's a natural plant hormone that triggers the ripening process. Acetylene, while similar in structure, is less commonly used for this purpose. Ethane and methane are not involved in fruit ripening. Therefore, the correct answer is Option A: Ethylene .
[#582] The natural source of hydrocarbon is
Correct Answer
(A) Crude oil
Explanation
Solution: The natural source of hydrocarbon is crude oil.
[#583] By which organic compound all the oils are known ?
Correct Answer
(C) Hydrocarbon
Explanation
Solution: Hydrocarbons are organic compounds containing carbon and hydrogen and found in crude oil and natural gas. Hydrocarbons are formed from the remains of marine animals and plants that lived in shallow inland seas, died, and drifted to the bottom. The term petroleum is used as a common denotation for crude oil (mineral oil) and natural gas, i.e., the hydrocarbons from which various oil and gas products are made.
[#584] Which of the following elements is found in all organic compounds?
Correct Answer
(A) Carbon
Explanation
Solution: The most common elements present in organic compounds are carbon, hydrogen, oxygen, and nitrogen. With carbon and hydrogen present, other elements, such as phosphorous, sulfur, silicon, and the halogens, may exist in organic compounds.
[#585] Ethanol containing 5% water is known as :
Correct Answer
(C) Rectified spirit
Explanation
Solution: A rectified alcohol is highly concentrated ethanol which has been purified by means of repeated distillation, a process that is called rectification. It typically contains 95% alcohol by volume and 5 % water. Normally, ethanol with 5 % water is known as pure alcohol.