Science Assertion - Reasoning (1 Marks)

(c) A is true but R is false.
Explanation: Silver reacts with sulphur present in the air and forms a layer of silver sulphide, therefore, silver articles get
tarnished. Thus assertion is true, but reason is false.

(a) Both A and R are true and R is the correct explanation of A
Explanation: DNA copying is necessary during reproduction because it leads to the transmission of characters from parents to
offsprings and brings about variation.

(a) Both A and R are true and R is the correct explanation of A.
Explanation: Here while carrying out an experiment if a compass needle is placed near a wire carrying current then due to the
effect of magnetism which is produced due to electric current produced in the wire the needle gets deflected. Which shows that
the magnetism and electricity are interlinked. So, both assertion and reason are true and reason is the correct explanation of
assertion.

(b) Both A and R are true but R is not the correct explanation of A.
Explanation: Plastics are non-biodegradable. They cannot be decomposed by the action of microbes. Recycling them can
manage them effectively.