List of top Chemistry Questions asked in TS POLYCET

In smelting the ore it is

Quantum mechanical model of the atom was developed by

The process of conversion of starches and sugars to C2H5OH is called

Which of the following is an unsaturated compound?

Galena is an ore of

The metal that occurs in the free form (native) is

Double bond present in

Number of unpaired electrons present in carbon atom is

Maximum no. of electrons in a subshell is equal to

The colour of methyl orange indicator in basic solution is

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

Identify the correct ascending order of energies of forbitals.

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?

"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

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

The flux used in extraction of iron from haematite is

The gas liberated when metallic sodium reacts with ethanol

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

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

What is the prefix used for functional group aldehyde ?

The compound formed in the following reaction is
\(\text{CH}_3-\text{CH}_2-\text{OH} \xrightarrow[\text{Conc. H}_2\text{SO}_4]{170^\circ\text{C}} \text{?}\)

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