SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

How is normal salt obtained? Give a suitable reaction.

What are the drawbacks of plastics?

A survey showed that one-time-use plastic items were among the top 10 plastic items found in garbage washed up from oceans. Can this be true? Explain how.

Most one-time-use plates are made from ______.

Pet name for Buckminster Fullerene is  ______.

Polycarbonate (PC) plastic contains ______.

The used plate is easy to recycle.

Assertion (A): PVC is an unsafe plastic.
Reason (R): Burning PVC releases dioxins, a most toxic chemical.

Answer the following by rearranging the jumbled letters :

Plastics made of _______ are represented by resin code #6.

sytlopynere

Answer the following by rearranging the jumbled letters :

One-time use plastics are also known as ______ plastics.

áwyrhotwa

Answer the following by rearranging the jumbled letters :

One-time use of plastics causes ______ damage.

trnvomenialne

Answer the following by rearranging the jumbled letters :

Expanded polystyrene is commercially known as ______.

mthreolco

Give some examples of one-time-use plastic.

Explain the structure of an electrolytic cell.

In Daniel's cell, a saturated solution of potassium chloride (KCl) acts as ______.

The process of purifying metals by electrolysis ¡s known as ______.

Which one among the following statements is correct?

In Daniel’s cell, Zinc metal acts as the cathode, and Copper metal acts as Anode.

What is an Electrochemical cell?

What is a Daniel cell?