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A white chemical compound becomes hard o...

A white chemical compound becomes hard on mixing with proper quantity of water. It is also used in surgery to maintain joints in a fixed position. Name the chemcial compound.

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Plaster of Paris (Calcium sulphate hemihydrate.)
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VK GLOBAL PUBLICATION-ACIDS, BASES AND SALTS -VERY SHORT ANSWER QUESTIONS (1 mark)
  1. Name the acid present in vinegar.

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  2. Two solutions A and B have pH values of 5 and 8 respectively . Which s...

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  3. If a few drops of a concentrated acid accidentally spill over the hand...

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  4. If someone is suffering from the problem of acidity after overeating, ...

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  5. Arrange the following in the increasing order of acidic strength. Ac...

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  6. Why does tooth decay start when the pH of mouth is lower than 5.5?

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  7. Two solutions A and B have pH values of 3.0 and 9.5 respectively. Whic...

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  8. A knife, which is used to cut a fruit, was immediately dipped into wat...

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  9. Explain why an aqueous solution of ammonium chloride is acidic in natu...

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  10. What are the products formed when an acid reacts with a base ?

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  11. Fresh milk has a pH of 6. When it changes into curd (yogurt) , will it...

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  12. A white chemical compound becomes hard on mixing with proper quantity ...

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  13. Which one or these has a higher concentration of H^(+) ions ? 1MHClo...

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  14. In addition to sodium hydrogencarbonate, bakings powder contains a sub...

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  15. What is the commercial name of calcium sulphate hemihydrate?

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  16. Name the substance obtained by the action of chlorine on dry slaked li...

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  17. How many molecules of water of crystallisation are there in (i) Plas...

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  18. Why does the milkiness disappear on passing excess of carbon dioxide t...

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  19. An aqueous solution turns red litmus solution blue. Excess addition of...

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  20. (a). What happens when concentrated solution of sodium chloride (brine...

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