Page 108 - Chemistry - XI

Q14. Highly volatile liquids should be kept
(a) away from fl ame (b) in airtight bottles (c) in cold places (d) all of these

Q15. Which of the following has the highest tensile strength?
(a) Cotton (b) Silk (c) Nylon (d) Terylene

Q16. Which of the following is a natural polyamide fi bre?
(a) Nylon-6 (b) Nylon-66 (c) Silk (d) Terylene

Q17. Too much iron in our body may cause
(a) liver disease (b) heart problems (c) rickets (d) both (a) and (b)

Q18. The amount of iron needed per day is

(a) 8.7 mg for men over 18 years (b) 14.8 mg for women 19 to 50 years old
(c) 8.7 mg for women over 50 years (d) All of these are correct

Q19. What percentage of iron is present in our body?
(a) 8% (b) 0.08% (c) 0.008% (d) 0.0008%

Q20. Which of the following vitamins helps in iron absorption?
(a) A (b) D (c) K (d) C

Q21. Which of the following fruits are rich in iron?
(a) Banana (b) Apples (c) Pomegranates (d) All of these

Q22. Which of the following mineral is/are present in banana activates vitamin D?
(a) Mg (b) Na (c) Fe (d) All of these

Q23. Which of the following is/are source of protein?
(a) Apple (b) Banana (c) Guava (d) All of these

Q24. Which of the following has the highest pH?
(a) Lemon (b) Tomato (c) Cucumber (c) Carrot

Answer key

1. (b), 2. (a), 3. (c), 4. (d), 5. (a), 6. (a), 7. (a), 8. (c), 9. (a), 10. (d), 11. (b), 12. (b), 13. (d),
14. (d), 15. (c), 16. (c), 17. (d), 18. (d), 19. (c), 20. (d), 21. (d), 22. (a), 23. (d), 24. (c)

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