Which of the following is obtained from the alcoholic fermentation of biomass:
A. Ethane gas
B. Methane gas
C. Naphthalene gas
D. Ethanol
Correct Answer: D. Ethanol
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Here, you may find CSS Optional Subjects MCQs. If you want to prepare MCQs of optional subjects, CSS MCQs platform is here to serve you while preparing your MCQs portion of your CSS Exam. Please practice these CSS Optional Subjects MCQs on a daily basis.
The important function of _____ is to make food:
A. Leaves
B. Seeds
C. Flowers
D. Roots
Correct Answer: A. Leaves
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Which of the following is/are the example/s of non-flowering plants?
A. Moss, Fern
B. Pine, Juniper
C. Thuja, Sago palm
D. All of these
Correct Answer: D. All of these
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The exchange of oxygen between blood and air takes place in the _______?
B. Lungs
C. Heart
D. All of these
Correct Answer: B. Lungs
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What is the largest delta in the world?
A. Ganges Delta
B. Mississippi Delta
C. Amazon Delta
D. Niger Delta
Correct Answer: A. Ganges Delta
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The soul of chemistry is its dealing with
A. Internal structural changes in matter
B. Composition of matter
C. Properties of matter
D. Composition and properties of matter
Correct Answer: D. Composition and properties of matter
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All of the following statements are incorrect for 20 mol of hydrogen peroxide except
A. it has 20 mol of hydrogen atoms
B. it has 30 mol of oxygen atoms
C. it has 80 mol of atoms
D. 30 mol of hydrogen atoms
Correct Answer: C. it has 80 mol of atoms
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