Question

uestion 4. Match the following:- 1. Curdling of milk. 2. Physical change 3.Cation 4. Oil and Water 5. Pbo 6. Sulphate 7. Electron 8. KOH 9. Brass 10. Wolfram 1. 1.6 10-19C 11. Alloy III. SO42- IV. Separating funnel V. Potassium hydroxide VI. Tungsten VII. Lead monoxide V!!!. Temporary in nature IX. Positively charge X. Chemical change​

Answer 1

Answer: the static electric charge on the oil drop is,  q=1.282×10  

−18

 C.

We know that Charge q=ne

where n is the no. of electrons and e is the charge of 1 electron, i.e. 1.602×10  

−19

C

The number of electrons present in the oil drop is, n=  

1.602×10  

−19

 

1.282×10  

−18

 

​

=8.

Explanation: