(A) Oxygen
(B) Hydrogen
(C) Carbon
(D) Calcium
The answer is: (A) Oxygen
The human body is 65% oxygen by mass.
Category: Chemistry MCQs FPSC NTS PPSC Past Papers Test Questions
Chemistry MCQs quiz test questions with answers for FPSC CSS PPSC NTS SPSC KPPSC test preparation, including questions from chemistry past papers. Basic Chemistry MCQ of class 9, 10, 11, 12 and advanced Chemistry MCQs of BSc, MSc or Masters level.
One atomic mass unit (amu) is a mass unit equal to exactly one-twelfth the mass of a
(A) carbon-8 atom
(B) carbon-12 atom
(C) carbon-16 atom
(D) carbon-20 atom
The answer is: (B) carbon-12 atom
Amino acids are the building blocks of
(A) Fats
(B) Vitamins
(C) Proteins
(D) Lipids
The answer is: (C) Proteins
Technique used to separate a mixture in order to be analyzed and studied is known as
(A) nitrification
(B) chromatography
(C) catalysis
(D) fermentation
The answer is: (B) chromatography
Which Chromatography technique is used for analyzing the volatile substances?
(A) Paper Chromatography
(B) Liquid Chromatography
(C) Gas Chromatography
(D) Thin-layer Chromatography
The answer is: (C) Gas Chromatography
Gas Chromatography technique is commonly used for analyzing the volatile substances.
Most of the dry mass in the trunk of a tree is derived from
(A) glucose
(B) hydrocarbons
(C) CO2
(D) amino acids
The answer is: (C) CO2
Most of the cholesterol in human’s bloodstream is produced by the
(A) kidney
(B) liver
(C) lung
(D) large intestine
The answer is: (B) liver
The unit of surface tension is:
(A) Newton per meter
(B) Newton per meter square
(C) 760 mm of Hg
(D) Newton square per meter
The answer is: (A) Newton per meter
The most reduced form of Carbon is
(A) O2
(B) CO2
(C) H2
(D) CH4
The answer is: (D) CH4
The most oxidized form of Carbon is
(A) O2
(B) CO2
(C) H2
(D) CH4
The answer is: (B) CO2