Iodized salt is beneficial for
1). lowering of blood pressure
2). prevention of dehydration
3). thyroid function
4). salivary glands
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2. Silver halides are used in photographic plates because they are
3. The gas used for filling weather balloons is
4. Chemical formula of washing soda is
6. Which among the following metals provides atmospheric oxide
8. The National Chemical Laboratory (India) is located in
9. Which of the following metals form an amalgam with other metals ?
10. Deficiency of which one of the following cause xerophthalmia-