JEE Chemistry - MCQ Practice Questions

In the contact process for H₂SO₄ manufacture, the catalyst used is:

The magnetic moment of [Fe(H₂O)₆]²⁺ complex is approximately:

Which of the following chlorides is most covalent in nature?

The disproportionation of H₂O₂ in acidic medium is catalyzed by:

The oxidation state of bromine in KBrO₄ is:

Which element shows variable oxidation states primarily due to incomplete d-orbitals?

The geometry of [PtCl₄]²⁻ complex is:

The rate of precipitation of AgCl from a solution is fastest when:

In aqueous solution, which ion hydrolyzes to the maximum extent?

The bond angle in PCl₃ molecule is approximately:

Which of the following compounds shows maximum lattice energy?

The ionization potential of beryllium is higher than boron because:

In the preparation of oxygen by thermal decomposition of KClO₃, the catalyst used is:

The complex [Cr(en)₃]³⁺ exhibits optical isomerism. The number of optical isomers is:

The rate of effusion of a gas depends on:

When a solution of potassium permanganate is diluted with water in the presence of ethanol, the purple color fades. This is because:

Which of the following lanthanide elements has the electronic configuration [Xe]4f⁷5d¹6s²?

The solubility product of Mg(OH)₂ is 1.8 × 10⁻¹¹ at 25°C. If a solution contains 0.1 M Mg²⁺ ions, what is the minimum pH required to precipitate Mg(OH)⁻ completely?

In the extraction of iron from its ore using a blast furnace, the temperature at the bottom of the furnace reaches approximately 1900°C. At this temperature, which compound primarily acts as the reducing agent?

The stability of dihydrogen bond (X-H···H-Y, where X and Y are electronegative atoms) depends on several factors. Which statement is INCORRECT regarding dihydrogen bonds?