Question

A) Both A and R are true and R is the correct explanation of A

B) Both A and R are true but R is not the correct explanation of A.

C) A is true but R is false.

D) A is false but R is true or Both A and R are false.
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1) Assertion (A):The compass needle deflects when brought near a current carrying wire.

Reason (R)-A compass has a magnet inside it.


2)Assertion (A)- Magnetic lines of forces do not intersect each other.

Reason (R)- There cannot be two direction of the magnetic field at a point.


3)Assertion(A)-When the diameter of the wire is doubled,the resistance of the wire becomes one-fourth.

Reason(R)-:The resistance of a wire is inversely proportional to the fourth power of its diameter.


4)Assertion(A): Chemical reaction is the process in which one or more substances are converted to

other substances.

Reason(R):When electric current is passed through water it decomposes to produce hydrogen and

oxygen gas


5)Assertion(A):Calcium carbonate decomposes to give carbon dioxide and calcium oxide.

Reason(R): The decomposition reactions takes place on application of heat therefore it is an

endothermic reaction.


6)Assertion(A): Sodium bicarbonate isused in antacid medicines.

Reason(R): It is a mild base which neutralizes the acidity of gastric juice.​

Answer 1

Answer:1(D)

              2(B)

               3(C)

                 4(D)

                 5(A)

                 6(A)

Explanation:

Answer 2

Answer:

A)R both A and R is true and R is the true explanation of A

B)A is the true.

C)both A amd R is true.

D)A is false but R is true.

E)both A and R is true.

E) R is true