Why is it necessary to use a salt bridge in a galvanic cell ?
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Why is the use of iodised salt advisable?
Iodine stimulates the thyroid gland to produce thyroxin hormone. It regulates carbohydrate, fat, and protein metabolism in our body. Deficiency of this hormone results in the enlargement of the thyroid...
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Depict the galvanic cell in which the reaction Zn(s) + 2Ag+(aq) → Zn2+(aq) + 2Ag(s) takes place, further show:
Answer: We have The galvanic cell corresponding to the given redox reaction can be represented as: Zn / Zn2+(aq) // Ag+(aq) / Ag (i) Zn electrode is negatively charged because at this electrode,...
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Explain role of salt bridge in Daniel cell.
It completes the electric circuit in the cell. It maintains the electric neutrality in the cell.
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Why is it necessary to use acetic acid and not sulphuric acid for acidification of sodium
Although the addition of sulphuric acid will precipitate lead sulphate, the addition of acetic acid will ensure a complete precipitation of sulphur in the form of lead sulphate due to...
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Name the technique to separate (i) butter from curd (ii) salt from sea-water (iii) camphor from salt.
(i) Butter can be separated from curd by centrifugation. (ii) Salt can be separated from sea-water by evaporation. (iii) Camphor can be separated from salt by sublimation.
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Depict the galvanic cell in which the reaction Zn (s) + 2Ag+ -->Zn2+ + 2Ag (s) takes place.
Zn (s)|Zn2+ (aq) || Ag+ (aq)|Ag (s) (a) Zn electrode (anode) (b) Ions are carriers of the current in the cell. (c) At anode : Zn (s) --> Zn2+ + 2e- At cathode : Ag+ + e-...
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For delegation to be effective it is necessary that responsibility be accompanied with necessary
For delegation to be effective it is necessary that responsibility is accompanied with authority. Responsibility refers to the obligation to complete a task which has been assigned by the superior....
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Salt A commonly used in bakery products on heating gets converted into another salt B
Baking powder (NaHCO3), salt A is commonly used in bakery products. On heating, it forms sodium carbonate (Na2CO3), B and CO2 gas, C is evolved. When CO2 gas is passed...
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Both Sarika and Mohan were asked to make a salt solution. Sarika was given a teaspoonful of salt and half a glass of water,
(a) They will mix salt with water to make salt solution. (b) Mohan’s solution would be saturated because in Mohan’s case some salt would remain undissolved and settle at the bottom...
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Salt can be separated from its solution (salt dissolved in water), because
(d) mixing of salt in water is a change that can be reversed by evaporation.
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