Energy Conversion

Q.

What is the negative plate of the lead-acid battery made up of?

Q.

Why is a small quantity of sulphuric acid is added to water for its electrolysis?

Q. The process of depositing a layer of a desired metal on another material by means of electricity is called ____.

1. electroplating
2. electrical conductivity
3. ionization
4. elctrolysis

Q. Which of the following solutions will not make the bulb in the given figure glow?

1. 
   Sodium Chloride
2. 
   Sugar solution in diluted water
3. 
   Copper Sulphate
4. 
   Silver Nitrate

Q.

How do electrostatic precipitators, scrubbers and catalytic converters prevent pollution?

Q.

What is the Electroplating? List three applications of electroplating

Q. can the charge on a body be 2*10-19

Q.

Electroplating of ______________ is done on objects like water taps and cycle bells to give them a shiny appearance.

Q. During the electroplating of copper in the copper sulphate solution, _____________ remains constant.

1. concentration of copper sulphate solution
2. mass of cathode
3. mass of anode
4. None of the above

Q. To prevent the corrosion or rust, the bridges and automobiles are coated with ___________ using the electroplating process.

1. aluminium
2. copper
3. silver
4. zinc

Q. Which of the following is not a chemical effect of electric current?

1. Glowing of an incandescent bulb
2. Deposition of metal on electrodes
3. Evolution of gases near electrodes
4. Change in colour of electrolyte

Q. Identify the anode from the given diagram of the electrolytic cell?

1. 1
2. 2
3. 3
4. 4

Q.

With respect to a lead-acid accumulator, which of the following is true?

1. The cathode is made of lead dioxide; the anode of lead and the electrolyte is dilute hydrochloric acid.

2. The anode is made of lead plumbate, the cathode of lead dioxide and the electrolyte is dilute hydrochloric acid.

3. The anode is made of lead dioxide, the cathode of lead and the electrolyte is dilute sulphuric acid.

4. The cathode is made of lead plumbate; the anode of lead and the electrolyte is dilute sulphuric acid.

Q. The solution in which the charged particles moved in the battery is called _________.

1. insulator
2. conductor
3. electrolyte
4. non-electrolyte

Q. Why it is said that charges always occur in pairs?

Q. What is charging by conduction

Q. Jewellery, medals, trophies can be coated with gold or silver using the process of _________.

1. electrolysis
2. electroplating
3. ionization
4. sedimentation

Q. how much positive and negative charge is there in a cup of water?

Q.

What does A, B and C stand for the setup of a lead-acid accumulator?

Q.

The two electrodes of a Lechlanche cell are made up of

1. carbon and zinc

2. copper and zinc

3. carbon and copper

4. glass and zinc

Q. In order to make the objects scratch resistant, which material is electroplated on the hard materials?

1. Zinc
2. Aluminium
3. Chromium
4. Iron

Q.

Electroplating helps

1. Fine finish to the surface

2. Shining appearance

3. Metal to become hard

4. Protecting metal against corrosion.

Q. How much positive or negative charge is there in a cup of water?

Q.

To electroplate an article with nickel requires an

Q. In an electrolytic cell, anions of the electrolyte ___________.

1. move towards anode
2. move towards cathode
3. are not formed
4. do not move

Q. The terminals of a bulb are connected to a cell via electrodes immersed in a non-electrolyte. The bulb will ___.

1. not glow
2. first glow and then turn off
3. fuse out
4. glow

Q. What is formal charge?

Q. When the liquid does not allow the electric current to pass, the circuit of the electric tester is complete and the bulb glows

1. True
2. False
3. Ambiguous
4. Data insufficient

Q. why is the charge quantised

Q. A collidal solution will have only one type of charge or some have positive and other have negative charge