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25% of NaCl is known as ………… ....

25% of NaCl is known as ………… .

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Sinew is also known as………………. .

Human placenta is known as ……………… placenta.

An alloy contatining 1- 15 % Mg and 85-99% Al is known as ______ .

The molten state of NaCl is also called as……….. .

An ionic compound NaCl is formed by………………..

The number of tetrahedral voids per unit cell in NaCl crystal is ………… .

If 5.85 g of NaCl is dissolved in 90 g of H_(2) O . The mole fraction of NaCl is ______. (molecular weight of NaCl = 58.5 )

Each unit cell of NaCl consists of 14 Cl − ions and ________.

If 250 mL of 0.25 M NaCl solution is diluted with water to a volume of 500 mL, the new concentration of the solution is ______.

CHETANA PUBLICATION-Substances in Common Use-EXERICSE
  1. Rock salt is ………..in colour.

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  2. Stong odour in swimming pool is due to ………… .

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  3. Molecular formula of sodium bicarbonate is ………… .

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  4. Soap is …………..in nature.

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  5. Molecualr formula for Magnesium bromide is. ………… .

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  6. The number of molecules of water of crystallization in washing soda is...

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  7. The chemical name of baking soda is ………..

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  8. …………..is used in treatment of hyperthyroidism.

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  9. The chemical name of Teflon is……….. .

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  10. 25% of NaCl is known as ………… .

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  11. …………..gas os released when bleaching powder is added to water.

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  12. Washing soda is ………….as it absorbs moisture if left exposed to air.

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  13. …………is used to make had water soft.

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  14. Molecular formula for Alum is ……….. .

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  15. ………..is used in blood test for diagnosing anaemia.

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  16. High grade of ……………..and …………..are used as raw material to manufacture...

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  17. Pickels, jams and sauce contain small quantities of ……….and ………. .

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  18. Excessive consumption of foods with added food colours leads to diseas...

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  19. Melting point of Teflon is …………… .

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  20. Anodizing is done by ………….. .

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