Question

please answer my question Q- 3,6,8,4,5

Answer 1

8)parallel arrengement used in domestictic wiring because if we do in domestic wiring in series its voltage up and down and our bulb can't glow proparly
and another region is the if we do in series it connected in only one switch
hope it is helpful to u

Answer 2

3) There will bo no change in the spoon but the solution may change its colour because copper is displaced by silver as silver is a more reactive metal than copper.
4)dry HCL- no change
NH3 gas-blue litmus to red
lemon juice - blue litmus to red
soft water-red litmus to blue
curd - blue to red
soap solution-red to blue
5)a)no
b)no
6)yes, plants during daytime undergo photosynthesis which releases oxygen as a product . during night they undergo respiration and releases carbon dioxide
8)because if one appliance stops working then the others may not be effected and continue to work
hope it help may we all pass with good percentage .ALL THE BEST