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