List of top Chemistry Questions

The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is:

The compound used for the preparation of $UF_6$ in the enrichment of ${92}_U^{235}$ is

The liquid crystal method is applicable to locate avein in the body because

The highest electrical conductivity of the following aqueous solutions is of:

The hardest substance is:

The extraction of which of the following metals involves bessemerisation?

Pyridine is less basic than triethylamine because

One mole of monoatomic ideal gas expands adiabatieally at initial temperature T against a constant external pressure of I atm from 1 L to 2 L. Find out the final temperature $(R = 0.0821\: atm \: K^{-1}m oI^{-1})$

Ionic compounds are formed most easily with:

Number of unpaired electrons in $Mn^{4+}$ is :

Number of isomers possible for $ {{C}_{4}}{{H}_{8}}O $ is:

Which of the following is a carbonate ore?

Schottky defect generally appears in:

Which of the following is electron deficient molecule ?

Which of the following is fully fluorinated polymer ?

Which of the following would have a permanent dipole moment ?

Which one of the following biomolecules is insoluble in water?

Which of the following factors may be regarded as the main cause of lanthanide contraction ?

What is the name of the element with atomic number 105?

which of the following has $p \pi-d \pi$ bonding?

$ KO_{2} $ is used in oxygen cylinders in space and submarine because it:

On heating quick lime with coke in an electric furnace we get:

Molecule having least dipole moment is:

Among the following the weakest base is:

The Van't Hoff factor $'i'$ accounts for