Question

19. Elements are initially classified in to metals and non metals by Lavoisier., based on their physical properties

like hardness, malleability, ductility, conductivity etc. Even though metals shows above properties, some

exceptional metals are also there. The scientist actually failed in this type of classification simply because he

can't arrange elements showing partial characteristics in proper location.


(i) Name a metal that is highly malleable.


(ii) What are mettalloids? Give one example.


(iii) Why metals are used for making kitchen utensils?


(iv) Name a soft metal?


(v) Metals are said to be electro positive. Why?​

Answer 1

Answer:Overview. Aqua regia (Latin for "Royal Water") is a solution of nitrohydrochloric acid. The traditional solution is comprised of a 3:1 mixture of hydrochloric acid and nitric acid, respectively...................................

Explanation: