Question

The wire of an electric fuse is an alloy of copper and ________

a. Tin b. Nichrome c. Nickel d. Copper

Q4. Fruits such as oranges, lemons etc. contain _________ acid.

a. Ascorbic acid b. Acetic c. Lactic d. Citric

Q5. Hydrochloric acid is secreted in _______.

a. Stomach b. Gall bladder c. Pancreas d. Lungs​

Answer 1

1. The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting.
2. Citric AcidAnswer. Citric Acid :Citric acid is a weak organic acid that is found in concentrated amounts in citrus fruits, especially lemons and limes.
3. Hydrochloric Acid Production
4. HCl is produced by the parietal cells of the stomach. To begin with, water (H2O) and carbon dioxide (CO2) combine within the parietal cell cytoplasm to produce carbonic acid (H2CO3), which is catalysed by carbonic anhydrase.

Answer 2

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1. Tin
2. Citric
3. Stomach

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