Question Text
Question 2 :
The process of depositing a layer of any desired metal on another material by means of electricity is called ...........................
Question 3 :
A tester is used to check the conduction of electricity through two liquids, labelled A and B. It is found that the bulb of the tester glows brightly for liquid A while it glows very dimly for liquid B. You would conclude that
Question 7 :
Why the bulb glows when the electric current passes through it?
Question 8 :
The process of depositing a layer of any desired metal on another material by means of electricity is called electroplating. Is the definition correct ?
Question 9 :
LED's have longer lifetime than light bulbs and fluorescent tubes. TRUE or FALSE?
Question 10 :
Small amounts of mineral salts present naturally in water are beneficial for human health. True or false ?
Question 13 :
A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transfered to the thin copper plate. Which electrode should be attached to the positive terminal of the battery?
Question 15 :
A thin plate of pure copper and a thick rod of impure copper are used as electrodes. Copper from impure rod is sought to be transferred to the thin copper plate. Which electrode should be attached to the positive terminal of battery?