Metals and Non-Metals — Science STD 10 — Question

Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?

1. Al₂O₃ + Fe.
2. MnO₂ + Al.
3. Fe₂O₃ + Al.
4. Cu₂O + Fe.

The property which is common between vinegar and curd is that they:

1. Have sweet taste.
2. Have bitter taste.
3. Are tasteless.
4. Have sour taste.

What is the chemical name of a substance used in white washing?

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of:

The property of self-combination of the atoms of the same element to form long chains is known as:

1. Protonation.
2. Carbonation.
3. Coronation.
4. Catenation.

10mL of a solution of NaOH is found to be completely neutralised by 8mL of a given solution of HCl. If we take 20mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralise it will be:

1. 4mL
2. 8mL
3. 12mL
4. 16mL

Which one of the following is not a fossil fuel?

1. Petrol.
2. Cock.
3. Charcoal.
4. Coal.

A white precipitate can be obtained by adding dilute sulphuric acid to:

In an experiment to study the properties of acetic acid a student takes about 2 mL of acetic acid in a dry test tube. He adds about 2 mL of water to it and shakes the test tube well. He is likely to observe that:

Define brittleness.