Charge and Current

Q.

Unit of Faraday is

1. Ampere
2. Coulomb

3. 

4. 

Q. 14.The charge required for the reduction of one mole of MnO4- to MnO2 is: A. 1F B. 3F C. 5F D. 7F

Q. During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is approximately:

1. 220 minutes
2. 330 minutes
3. 55 minutes
4. 110 minutes

Q. Why electrons are negetive?

Q. Faraday conducted many experiments. So naturally he would have to make several calculations.
He once passed a current of 1 A through a wire. What do you think is the number of electrons that moved past a point in the wire in one second?

1. $6.023\times {10}^{23}$
2. $3.12\times {10}^{18}$
3. $3.02\times {10}^{23}$
4. $6.23\times {10}^{18}$

Q. in michael faradays cathode ray discharge tube experiment, why is low pressure maintained in the cathode tube ?

Q. Which of the following pairs of ions are isoelectric and isostructural?

1. ${CO}_3^{2-}$, ${NO}_3^{-}$
2. ${ClO}_3^{-}$, ${CO}_3^{2-}$
3. ${SO}_3^{2-}$, ${NO}_3^{-}$
4. ${ClO}_3^{-}$, ${SO}_3^{2-}$