An iron nail is kept in each of the following liquids. In which case would it lose its shine and appear dull?

Pick one material from the following which is completely soluble in water.

You are provided with the following materials

(i) magnifying glass

(ii) mirror

(iii) stainless steel plate

(iv) glass tumbler.

Which of the above materials will you identify as transparent?

Binu found a bag containing the following materials.

(i) Mirror

(ii) Paper stained with oil

(iii) Magnet

(iv) Glass spectacles

Help Binu in finding out the material(s) which is/ are opaque.

While doing an activity in class, the teacher asked Pinky to handover a translucent material. Which among the following materials will Pinky pick and give her teacher?

Which pair of substances among the following would float in a tumbler half filled with water?

Which among the following are commonly used for making a safety pin?