Question

(C) Match the columns A and B
11 Lead storage battery
12 Mercury cell
13. Fuel cell
(a) Maximum efficiency
(b) Prevented by galvanization
(c) Reaction at anode. Z-> Zn. 2e
14. Rusting
15 Dry cell
(d) PD is anode, PDO is cathode
(e) Used in digital watches
(1) Salt bridge used
Answer the following questions from 16 10 18. Each carries 2 scores
16 Unit cell can be broadly classified into 2 categories primitive and centered unit cells.
(a) What is unit cell?
(b) Name the three types of centred unit cells?
17. Vapour pressure of a solution is different from that of pure solvent
(a) Name the law which helps us to determine partial vapour pressure of a volatile
component?
(b) State the above law?
18. Electrochemical cell is a device which converts chemical energy to electrical energy
(a) Represent the electro chemical cell in the following equation. Ni + 2 Ag
->2A9.)+ Nico
(b)What will be the standard EMF of the cell with the reaction of Nickel electrode
is -0.25 V and that of silver electrode is 0.80 V
Answer the following questions from 19 to 21. Each carries 3 Scores
19. Schottky and freckle defects are stoichiometric defects.
(a) Write any two differences between schottky and frenkel defect?
(2)
(b) When pure sodium chloride (NaCl) crystal is heated in an atmosphere of sodium
Vapours, it turns yellow. Give reaction?
20. Galvanic cells are classified into primary and secondary cell.
(a) Write any two differences between primary and secondary cells?
(b) () What is fuel cell?
(1)
(11) Write the overall cell reaction in Hz-Oz fuel cell?
21. Osmotic pressure is a colligative property
(a) What is colligative property
(b) 1.00g of non-volatile solute dissolved in 50 g of benzene lowered the freezing
point of benzene by 0.40k The freezing point depression constant of benzene is 5 12
kkg mol
Find the molar mass of solute​

Answer 1

Answer:

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