All of these are products of technology EXCEPT

12. Brass is an alloy primarily composed of copper and zinc. The correct option is A.

a) Zinc

13. Rubber is a tough, elastic, non-metallic organic material. The correct option is C.

c) rubber

14. Products of ceramics include items like flower vases, tiles, and water closets, which are made from clay and hardened by heat. A slipper is typically made from fabric, leather, or rubber, not ceramic. The correct option is A.

a) slipper

15. Products of technology are items created through the application of scientific knowledge for practical purposes. Telephones, radios, and light bulbs are all technological products. Stone is a natural material, not a product of technology. The correct option is C.

c) Stone

16. Workshop accidents are caused by unsafe practices or conditions. Failure to wear protective clothing, damaged electric cables, and students playing in the workshop can all lead to accidents. Proper handling of workshop tools and equipment prevents accidents, rather than causing them. The correct option is C.

c) Proper handling of workshop tools and Equipment

17. Drawing instruments are tools used for drafting. A tracing pen, Tee square, and French curve are all drawing instruments. Tracing ink is a consumable material used with drawing instruments, but it is not an instrument itself. The correct option is A.

a) Tracing ink