Test Details

Chemical Effects Of Electric Current,Some Natural Phenomenoa

Feb 12, 3:30 PM

45 minutes

Feb 13, 4:15 PM

50.0 marks

MCQ

25 questions

PRASHANT N PUROHIT

Achievers'Academy

Class Details

Maths

Science

Class 8th

Maths

Science

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Question Text

Question 1 :
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 2 :
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 3 :
If you pass current through copper sulphate solution, copper gets deposited on the plate connected to the.........................terminal of the battery.

Question 4 :
Small amounts of mineral salts present naturally in water are beneficial for human health. True or false ?

Question 5 :
While preparing a list of objects around you that are electroplated, you may include -

Question 6 :
There are two wires (called leads) attached to an LED. One lead is slightly longer than the other. TRUE or FALSE?

Question 7 :
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 8 :
Tin cans used for storing food, are made by electroplating of

Question 9 :
Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour?

Question 10 :
Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour?

Question 13 :
Suppose you are outside your home and an earthquake strikes. Which of the following you should not do to protect yourself?

Question 14 :
An earthquake measures 3 on Richter scale. Is it likely to cause much damage?

Question 15 :
The scale on which the destructive energy of an earthquake is measured is:

Question 16 :
State TRUE or FALSE : A charged glass rod attracts a charged plastic straw.

Question 19 :
The weather department has predicted that a thunderstorm is likely to occur an a certain day. Suppose you have to go out on that day. Would you carry an umbrella?

Question 20 :
State in India where earthquakes are more likely to strike is:

Question 21 :
When a glass rod is rubbed with a piece of silk cloth, the rod :

Question 22 :
State TRUE or FALSE : Earthquakes can be predicted in advance.

Question 24 :
An earthquake measures 3 on Richter scale. Would it be recorded by a seismograph?

Question 25 :
State TRUE or FALSE : Lightning conductor cannot protect a building from lightning.

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