Q6 Explain electrolytic refining with dig.
Q7 Explain Reduction on the basis of position of metals on reactivity
series.
Q8 Explain the activity to show that hydrogen gas is evolved when metal
reacts with acids with dig.
Q9 Write the chemical name ,formula ,preparation, properties, & uses of
(a) Washing soda (b) Baking soda (c) Bleaching powder (d) plaster of
paris.
Q10 Preparation of NaOH is known as chlor alkali process. explain.
Answers
Answer:
6.
It is the method for refining impure metals eg. in E.R of Cu CuSO4 is used as an electrolyte imppure Cu is made cathode
7.
when the metals of medium reactivity series come in the form of oxide they are doing auto reduction process to get pure metal. the get the metal oxide from roasting and calcination. now they are doing auto reduction process. in the auto reduction process we generally use carbon.
8.
When Reaction between HCF And NA took place.
9.
a. Washing soda-Washing soda is a whitish, odourless powder. Its chemical formula is Na2CO3 and is better known as sodium carbonate. It is hygroscopic in nature that is, it absorbs moisture from the air. It is highly soluble in water and forms strongly alkaline water solution.
b. Baking Soda-Baking soda is the common name of sodium bicarbonate. The chemical formula of baking soda is NaHCO3. Baking Soda is also defined as Sodium Bicarbonate.
c.Bleaching Powder-Bleaching powder is a pale yellowish powder existing with a strong smell of chlorine. It is soluble in water but due to the presence of impurities, we never observe a clear solution. Its chemical formula is CaOCl_2 with its chemical name as Calcium hypochlorite.
d. Plaster of Paris-Plaster of Paris is a chemical compound consisting of fine white powder, which hardens when exposed to moisture and allowed to dry. Its chemical formula of Plaster of Paris is CaSO4. 1/2H2O and is better known as calcium sulfate hemihydrate.
10.
Preparation of NaOH is known as chlor alkali process. ... Usually the process is conducted on a brine (an aqueous solution of NaCl), in which case NaOH, hydrogen, and chlorine result. When using calcium chloride or potassium chloride, the products contain calcium or potassium instead of sodium.
Hope it helps you a lot...
the answer was as per my knowledge
Answer:
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