Question : What is the chemical symbol of Arsenic?

Option 1: Ac

Option 2: An

Option 3: As

Option 4: Ar

Question : Saltpetre is another name for ______.

Option 1: sodium chloride

Option 2: potassium nitrate

Option 3: potassium chloride

Option 4: sodium hydroxide

Question : If $a+b+c=1, ab+bc+ca=-1$ and $abc=-1$, then the value of $a^{3}+b^{3}+c^{3}$ is:

Option 1: 1

Option 2: – 1

Option 3: 2

Option 4: – 2

Question : Which chemical element has an atomic number of 31?

Option 1: Aluminium

Option 2: Gallium

Option 3: Indium

Option 4: Thallium

Question : If $s-\frac{1}{s-8}=20$, then the value of $(s-8)^3-\frac{1}{(s-8)^3}$ is:

Option 1: 1324

Option 2: 1764

Option 3: 1864

Option 4: 1944