Chemical Reactions and Equations — Science STD 10 — Question

In a soap micelle, the soap molecules are arranged radially with:

Pentane has the molecular formula C₅H₁₂. It has:

Upto which element, the Law of Octaves was found to be applicable:

1. Oxygen.
2. Calcium.
3. Cobalt.
4. Potassium.

Arrange the following elements in the order of their increasing nonmetallic character Li, O, C, Be, F:

1. F < O < C < Be < Li.
2. Li < Be < C < O < F.
3. F < O < C < Be < Li.
4. F < O < Be < C < Li.

Carbon -12 atom has:

compound → element + element

Which of the following metal exists in the liquid state?

1. Na
2. Ag
3. Cr
4. Hg

When ethanol is heated with alkaline potassium permanganate solution, it gets converted into ethanoic acid. In this reaction, alkaline potassium permanganate acts as:

An acidic oxide is produced by the element:

1. Na
2. C
3. Ca
4. H