Science : Ch 03 – Metals and Non-metals

Which of the subsequent quality is generally not shown by metals?

The solution of one of the following compounds will not conduct electricity. This compounds is:

Although metals form basic oxides, which of the subsequent metals form an amphoteric oxide?

Shwetha took three beakers A, B and C containing zinc sulphate, silver sulphate and iron (II) sulphate solutions respectively. Copper pieces were added to each beaker. The solution will Become visible blue in the case of:

Which of the following Metal have very low melting points?

2 ml each of conc. HCl, HNO₃, and a mixture of conc. HCl and conc. HNO3 in the ratio of 3:1 were taken in test tubes labelled as : A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C. The metal could be:

1. AI
2. Au
3. Cu
4. Pt

Name a metal that have very low melting points.

The Most malleable and ductile metal

Give the formula of the stable binary compound that would be formed by the combination of following pair of elements: Mg and N₂

Give the formula of the stable binary compounds that would be formed by the combination of following pair of elements: Li and O₂

Name one non-metal that exist in liquid state at room temperature.

Name a metal which is highly malleable

A non-metal X exists in two diferent forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.

When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (molecular mass = 40) and liberates a gas Z which easily catches fre. Identify X, Y and Z.

which metal is more reactive?