List of top Chemistry Questions asked in TS POLYCET

The number of elements present in the fifth period of the modern periodic table:
Which one of the following processes involves chemical change?
The volume of CO\(_2\) liberated in litres at STP when 25 g of CaCO\(_3\) is treated with dilute HCl containing 14.6 g of HCl is:
What is the nature of a solution whose pH value is 'zero'?
Atoms with low ionization potential and large atomic size:
The number of magnetic quantum number values for the angular momentum quantum number \( l = 1 \) is:
An orbital can hold only two electrons. This can be explained:
Which type of atoms form cations easily?
What is the molecular formula of alkane?
Which of the following is a mild base?
The compound used in the preparation of borax is:
Polar covalent bond is present in:
Double bond is present in:
Shape of H\(_2\)O molecule is:
The predicted properties of eka-boron by Mendeleeff were almost same as of \_\_\_\_\_ which was discovered later.
The compounds formed when a hydrogen atom is replaced from NH₃ by an alkyl group is:
Ionization energy generally:
The chemical bond formed by the overlapping of orbitals on the internuclear axis is:
Which one of the following molecules is an example of sp² hybridisation?
Which one of the following has smaller atomic radii?
The below reaction is an example of: \[ \text{CH}_3\text{C} \equiv \text{C}\text{CH}_3 \xrightarrow{\text{Ni catalyst, H}_2} \text{CH}_3\text{CH}_2\text{CH}_2\text{CH}_3 \quad (\text{n-Butane}) \]
The hybridisation of carbon in graphite is:
Fats are esters of higher fatty acids and:
IUPAC name of CH\(_3\)CHO is:
Identify the sulphide ore among the following: