Two statements are given- one labeled Assertion (A) and the

other labeled Reason (R). Select the correct answer to these questions from the codes (i), (ii), (iii) and (iv) as given below

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

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

iii) A is true but R is false.

iv) A is false but R is true.

Asswertion (A): Following are the structural isomers of Butane

Reason (R): Structural isomers have the same molecular formula but differ in their structures.

Identify the basic salt from the following salts:

(I) The positions of four elements A, B, C and D in the modern periodic table are shown below. Which element is most likely to form an acidic oxide?

two statements are given- one labeled Assertion (A) and the

other labeled Reason (R). Select the correct answer to these questions from the codes (i), (ii),(iii) and (iv) as given below

Assertion: A fuse wire is always connected in parallel with the mainline.

Reason: If a current larger than the specified value flows through the circuit, fuse wire melts.

a) Write two observations when lead nitrate is heated in a test tube.

b) Name the type of reaction.

c) Write a balanced chemical equation to represent the above reaction.