A C Sehgal Solutions for Exercise 1: ORAL QUESTIONS

A rock is found to have a very small amount of iron. Geologists thought it would be too expensive to extract iron from it. Would you call the rock an ore of iron? 

An element is a metal or not is finally determined by whether it is hard and shiny or not. Do you agree? Give reasons.

Which property must a substance possess for it to be possible to make thin wires of the material?

A metal was burnt in the air. The substance formed was dissolved in water and tested with blue and red litmus paper. What result do you expect?

Metal ${\mathrm{M}}_1$ is more reactive than metal ${\mathrm{M}}_2$. Which metal will be higher up in the reactivity series?

Metal ${\mathrm{M}}_3$ reacted with a salt of metal ${\mathrm{M}}_4$. The products were ${\mathrm{M}}_4$ and a salt of ${\mathrm{M}}_3$. However, a metal ${\mathrm{M}}_4$ had no reaction with a salt of ${\mathrm{M}}_3$. What can you say about the reactivities of ${\mathrm{M}}_3$ and ${\mathrm{M}}_4$?