81. Soap is made by alkaline hydrolysis of
Answer: Ester
82. From which water source does soap clean best?
Answer: Rain
83. A compound with the same molecular formula but different structural formula is called
Answer: Isomerism
84. The IUPAC name of the compound CH₃-O-C₂H₅ is
Answer: Methoxyethane
85. The compound that participates in an addition reaction is
Answer: H-C≡C-H
86. Which of the following is vinegar?
Answer: CH₃COOH
87. Soap is made by alkaline hydrolysis of
Answer: Ester
88. From which water source does soap clean best?
Answer: Rain
89. NaCl crystal is composed of
Answer: Na+ and Cl– ions
90. If an object has a temperature of 268K, it is equivalent to
Answer: -5°C
91. The energy absorbed by a substance during a phase change is
Answer: Latent heat
92. Why does the water in a pot kept in summer become cold?
Answer: Evaporation
93. The correct order to convert 25°C, 38°C, and 66°C to Kelvin is
Answer: 298K, 311K, and 339K
94. Which of the following is not an element?
Answer: Silica
95. Which of the following is not a metalloid?
Answer: Gallium
96. Which of the following is a compound?
Answer: CO
97. Which of the following is not a good conductor and insulator of electricity?
Answer: Germanium
98. Which of the following is not a chemical change?
Answer: Sublimation of naphthalene
99. Which of the following can be a suspension?
Answer: Milk of magnesia
100. Which of the following is an alloy of solid in solid?
Answer: Brass