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Answer the following : (a) Why is Plas...

Answer the following :
(a) Why is Plaster of Paris written as `CaSO_(4)1//2H_(2)O` How is it possible to have half a water molecule attached to `CaSO_(4)` ?
(b) Why is sodium hydrogen carbonate an essential ingredient in antacids ?

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Why is the formula of plaster of paris written as CaSO_(4) .1/2 H_(2)O ?

The chemical formula of plaster of paris is CaSO_(4).2H_(2)O

The name of CaSO_4.1/2H_2O is

Which of the following is gypsum and which one is plaster or Paris ? (i) CaSO_(4)*(1)/(2)H_(2)O (ii) CaSO_(4)*2H_(2)O

How many hydrogen-bonded water molecule(s) are associated in CuSO_(4).5H_(2)O ?

DINESH PUBLICATION-ACIDS, BASES AND SALTS -SHORT ANSWER QUESTIONS
  1. A ehite chemical compound becomes hard on mixing proper quantity of wa...

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  2. (a) Define pH scale. Draw a figure showing variation of pH which chang...

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  3. What is the action of litums on (i) dry ammonia gas (ii) solution of a...

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  4. State the observations you would make on adding sodium hydroxide to aq...

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  5. (a) Name one natural source of each of the following acids. (i) Citr...

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  6. 2 mL of sodium hydroxide solution is added to a few pieces of granulat...

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  7. (a) Identify the compound of calcium which is used for plastering frac...

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  8. Why do HCl, HNO(3), etc., show acidic characters in aqueous solutions ...

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  9. (a) Why are some salts called hydrated salts ? (b) Give two examples...

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  10. What is an olfactory indicator? Name two olfactory indicators. What is...

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  11. Answer the following : (a) Why is Plaster of Paris written as CaSO(4...

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  12. (a) Write the name given to bases that are highly soluble in water. Gi...

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  13. A substance X which is used as an antacid reacts with dilute hydrochlo...

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  14. (a) The blue colour of crystals of a substance changed on heating in a...

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  15. While diluting an acid, why is it recommended that the acid should be ...

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  16. What happens when an acid reacts with a metal hydrogencarbonate? Write...

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  17. Why should curd and sour substances not be kept in brass and copper ve...

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  18. If some one is suffereing from acidity in stomach, which of the follow...

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  19. (a) What are the common names of . (a) CaOCl(2), and (b) Na(2)CO(3).10...

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  20. How is chloride of lime chemically different from calcium chloride " W...

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