71. Chromatography is based on which of the following? A. Different solubilities of different substances in different medium B. Same solubilities of different substances in same medium C. Different solubilities of different substances in same medium D. Both A and B Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
72. At constant temperature, the product of pressure and volume of a given amount of a gas is constant. This is A. Gay-Lussac Law B. Charles Law C. Boyle's Law D. Pressure Law Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
73. Which one of the following elements exists in liquid state at room temperature? A. Mercury B. Lead C. Sodium D. Calcium Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
74. A balloon filled with ethylene is pricked with a sharp point and quickly dropped in a tank of H2 gas under identical conditions. After a while the balloon will have A. shrunk B. enlarged C. completely collapsed D. remained unchanged in size Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
75. Which one of the following is called Dry Ice? A. Solid carbon dioxide B. Liquid carbon dioxide C. Liquid nitrogen D. Liquid ammonia Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
76. A balloon filled with helium rises in air because A. air exerts an upward force on the balloon B. the balloon is weightless C. helium is less dense than air D. helium pushes down on the air below the balloon Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
77. Iodine can be separated from a mixture of iodine and potassium chloride by A. sedimentation B. filtration C. sublimation D. distillation Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
78. An emulsion is a colloid of A. gas in a liquid B. liquid in a liquid C. liquid in a gas D. gas in a solid Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
79. Ink is prepared from A. dye B. tannin C. starch D. latex Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
80. According to which one of the following laws it is indicated that when two or more gases react with one another, their volumes bear a simple ratio? A. Law of Mass Action B. Law of Multiple Proportions C. Law of Reciprocal Proportions D. Law of Combining Volumes Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
