List of top Chemistry Questions asked in TS POLYCET

Galena is an ore of

The colour of methyl orange indicator in basic solution is

In smelting the ore it is

Quantum mechanical model of the atom was developed by

The reaction of an acid with a base to give a salt and water is known as

Number of unpaired electrons present in carbon atom is

Double bond present in

Maximum no. of electrons in a subshell is equal to

What is the symbol used in a chemical equation to represent the gas evolved in a reaction?

Which of the following is an unsaturated compound?

The total number of inner transition elements in the modern periodic table is

Identify the correct ascending order of energies of forbitals.

The gas liberated when metallic sodium reacts with ethanol

"Pairing of electrons in orbitals starts only when the available degenerate orbitals are singly filled" is stated by

Which of the following quantum numbers describes the spatial orientation of orbitals?

General formula of alkynes

The flux used in extraction of iron from haematite is

What is the molar ratio of hydrogen and oxygen in the formation of water ?

Which one of the following pair belongs to same homologous series?

How many molecules of hydrogen are present in 10 g of hydrogen ?

Which of the following represents the correct order of electronegativity among halogens?

Functional group present in carboxylic acid is

Plaster of Paris is___

The molecule in which the central atom has one lone pair of electrons in its valence shell is

The gas formed when Zn is treated with dil. HCl is