JEE Chemistry Some Basic Concepts Of Chemistry MCQs Set B

    Question: The mass of 1 mole of electrons is a) 0.55 mg b) 9.1 × 10–28g c) 1.008 mg d) 9.1 × 10–27 g Answer: 0.55 mg   Question: 10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water…

JEE Chemistry Some Basic Concepts Of Chemistry MCQs Set A

    Question: A mixture of sand and iodine can be separated by a) sublimation b) crystallisation c) distillation d) fractionation Answer: sublimation   Question: Difference in density is the basis of a) gravity separation b)…