Question 1 :
How much energy is given to each coulomb of charge passing through a 6 V battery?

Question 2 :
Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. What would be the ratio of heat produced in series and parallel combinations ?

Question 3 :
How is a voltmeter connected in the circuit to measure the potential difference between two points?

Question 4 :
How much current will an electric bulb draw from a 220 V source, if the resistance of the bulb filament is 1200 Ω?

Question 5 :
An electric lamp of 100 ohm, a toaster of 50 ohm and a water filter of resistance 500 ohm are connected in parallel to a 220 V source. What is the resistance of an electric iron connected to the same source that takes as much current as all the three appliances ?

Question 6 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19d33273b230584979bbc.PNG' /> Above image is the symbol of ______ in circuit diagram.

Question 7 :
What is the highest total resistance that can be secured by combinations of four coils of resistance 4 Ω, 8 Ω, 12 Ω, 24 Ω?

Question 8 :
Which uses more energy, a 250 W TV set in 1 h or a 1200 W toaster in 10 min?

Question 10 :
How much power is used in 2$\Omega$ resistor when a 4 V battery is connected in parallel with 12$\Omega$ and 2$\Omega$ resistors?

Question 11 :
A compound C (molecular formula, $C_2H_4O_2$) reacts with Na - metal to form a compound R and evolves a gas which burns with a pop sound. Compound C on treatment with an alcohol A in presence of an acid forms a sweet smelling compound S (molecular formula, $C_3H_6O_2$). On addition of NaOH to C, it also gives R and water. S on treatment with NaOH solution gives back R and A. Identify A.

Question 12 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19c93273b230584979b04.JPG' /> State True or False: The above figure is a structural isomer of butane.

Question 13 :
Which of the following does not belong to the same homologous series?

Question 14 :
Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of

Question 15 :
How is ethene prepared from ethanol? Give the reaction involved in it.

Question 16 :
A compound C (molecular formula, $C_2H_4O_2$) reacts with Na - metal to form a compound R and evolves a gas which burns with a pop sound. Compound C on treatment with an alcohol A in presence of an acid forms a sweet smelling compound S (molecular formula, $C_3H_6O_2$). On addition of NaOH to C, it also gives R and water. S on treatment with NaOH solution gives back R and A. Identify C.

Question 17 :
A compound C (molecular formula, $C_2H_4O_2$) reacts with Na - metal to form a compound R and evolves a gas which burns with a pop sound. Compound C on treatment with an alcohol A in presence of an acid forms a sweet smelling compound S (molecular formula, $C_3H_6O_2$). On addition of NaOH to C, it also gives R and water. S on treatment with NaOH solution gives back R and A. Identify R.

Question 18 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19cae273b230584979b24.JPG' /> State whether the above compound is a unsaturated or saturated hydrocarbon?

Question 20 :
Unsaturated hydrocarbons contain multiple bonds between the two C-atoms and show addition reactions. Give the test to distinguish ethane from ethene.