Science Class 10th PYQs and Practice Questions for Board Exams
Science PYQs and IMP Qs Class 10th Science PYQs and Practice Questions for Board Exams 2023- 2024 ayushagarwal_maths MCQs Q.1 . Light of which of the following colour is scattered least ? (a) Violet (b) Red (c) Blue (d) Yellow Ans. (b) Red Q.2. In an electrolysis of water, if the mass of the gas collected at the anode is mₐ and the mass of the gas collected at the cathode is mc the value of (mc/mₐ) is : (a) 8 (b) 16 (c) 1/16 (d) 1/8 Ans. (d) 1/8 Q.3. The unit of electric energy is : (a) kilowatt (b) kilowatt-hour (c) watt (d) kilowatt per hour Ans. (b) kilowatt-hour Q.4. The average weight of an adult human brain is : (a) 1200 g (b) 1350g (c) 1450 g (d) 1500 g Ans. (b) 1350 g Q.5. In which life processes we take energy from food ? (a) Nutrition (b) Excretion (c) Circulation (d) All of these Ans. (a) Nutrition Q.6. Why do estrogen levels fall after menopause ? (a) Cells of