Chemical Reactions and Equations — Science STD 10 — Question

In the context of redox reactions, the removal of hydrogen from a substance is known as:

Which one of the following correctly represents Sodium oxide?

In which of the following compounds, -OH is the functional group?

1. Butanone.
2. Butanol.
3. Butanoic acid.
4. Butanal.

One of the constituents of baking powder is sodium hydrogencarbonate, the other constituent is:

Which of the following can be used in the laboratory to test whether a solution is a base or an acid?

One of the following organic compounds cannot decolourise the red-brown colour bromine water. This compound is:

1. C₁₄H₂₈
2. C₇H₁₂
3. C₆H₁₄
4. C₉H₁₆

Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?

1. Group 8.
2. Group 2.
3. Group 18.
4. Group 10.

You are asked to prepare hard water in your laboratory. Select a group from the following groups of salts, any salt of which you may dissolve in distilled water to obtain hard water.

A sulphide ore is converted into metal oxide by the process of:

An element is soft and can be cut with a knife. It is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be:

1. Mg
2. S
3. P
4. Na