Metallurgy — Chemistry STD 10 — Question

What is observed when hot concentrated caustic soda solution is added to Zinc . Write balanced equations.

Write the equation of the following reaction :
Concentrated sulphuric acid is poured over sugar

Give examples for the following:
Two liquid non polar compounds.

What do you observe when ammonia is bubbled through red litmus solution?

When an ammonium hydroxide solution is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. What is the cation present in solution B?

A chemical reaction in which gain and loss of electrons takes place simultaneously.

Butna-2ol.

Why is the electron affinity of fluorine less than chlorine?

Define isomerism.

Name the metal which is alloyed with zinc to form brass.