List of top Chemistry Questions

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:

In which case change in entropy is negative? (1)(2) (3 (4)

Which mixture of the solutions will lead to the formation of negatively charged colloidal [Agl]I- Sol.? (

Which of the following is an amphoteric hydroxide?

The value of x in the following chemical reaction is
\(C_3H_8 + xO_2 \rightarrow YCO_2 + zH_2O\)

Compounds with spin-only magnetic moment equivalent to five unpaired electrons are

If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is

$9$ gram anhydrous oxalic acid (mol. wt. = $90$) was dissolved in $9.9$ moles of water. If vapour pressure of pure water is $p_{1}^\circ 1$ the vapour pressure of solution is

The combining ratios of hydrogen and oxygen in water and hydrogen peroxide are $1 : 8$ and $1 : 16$ . Which law is illustrated in this example ?

The rule which describes the electron distribution in degenerate orbitals of an atom is

The possible I values for a given n value are

Which of the following set of quantum numbers is not correct?

The correct order of energies for the electromagnetic spectrum is

The Quantum mechanical model of atom was proposed by

Which of the following is an example of acid?

Electrolysis of aqueous NaCl solution produces

The chemical name of plaster of Paris is

The colour of methyl orange indicator in HCl is

Which of the following is an example for neutralization reaction?

The tarnishing of silver spoon in presence of moisture is due to formation of

One mole of \(H_2\) gas contains how many molecules? 

Lead nitrate on reaction with potassium iodide gives yellow precipitate. The yellow color is due to
\(Pb(NO_3)_2 + 2KI \rightarrow PbI_2 + 2KNO_3\)

The organic compound with R---- COO-----R' functional group is prepared from

For extraction of highly reactive metal compounds from their ores, some impurities are added during the electrolysis process. The role of impurity is

The IUPAC name of