A. Surface phenomenon
B. Continuous
C. Exothermic
D. Cause cooling
✅ The correct answer is option C.
Chemistry
Practice the latest Chemistry MCQs with answers and explanations to prepare for exams and job tests. Our collection covers key topics such as atomic structure, periodic table, chemical bonding, organic chemistry, inorganic chemistry, physical chemistry, and environmental chemistry. These Chemistry multiple-choice questions are designed for students, competitive exam aspirants, and professionals appearing in NTS, PPSC, FPSC, CSS, PMS, university entry tests, and medical admission tests. Improve your concepts and problem-solving skills with our updated and comprehensive Chemistry MCQs online.
72. The oxides of beryllium BeO is
A. Acidic
B. Basic
C. Amphoteric
D. Neutral
✅ The correct answer is option A.
73. The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is
A. 3
B. 2.7
C. 2
D. 1.5
✅ The correct answer is option B.
74. Vapour pressure of water at 100 degrees C is
A. 55 mm Hg
B. 760 mm Hg
C. 355 mm Hg
D. 1489 mm Hg
✅ The correct answer is option B.
75. Which element is necessary for normal leaf development?
A. Si
B. Ba
C. Mg
D. Ca
✅ The correct answer is option D.
76. Kc value has
A. No units
B. Units
C. Both a & b
D. None
✅ The correct answer is option C.
77. Which one of the following does not show hydrogen bonding?
A. Water
B. Ethyl alcohol
C. Phenol
D. Diethyl ether
✅ The correct answer is option D.
78. Li is different from its family members due to
A. Small size
B. High charge density
C. Less electropositivity
D. All of the above
✅ The correct answer is option D.
79. If a buffer solution of higher pH than seven is to be made we use
A. Strong acid and strong base
B. Weak acid and strong base
C. Weak acid and strong base
D. Weak acid and its salt with the strong base
✅ The correct answer is option D.
80. Liquid crystal is discovered by
A. William Crooks
B. Fredrick Reinitzer
C. J.J Thomson
D. Bravis
✅ The correct answer is option B.