21.

Maximum deviation from ideal gas expected from

• H₂ (g)

• N₂ (g)

• CH₄ (g)

• CH₄ (g)

A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm^-3. The molar mass of the metal is (N_A Avogadro's constant= 6.02 x 10²³ mol^-1)

• 40 g mol^-1

• 30 g mol^-1

• 27 g mol^-1

• 27 g mol^-1

A magnetic moment of 1.73 BM will be shown by one among the following

• [Cu(NH₃)₄]²⁺

• [Ni(CN)₄]^2-

• TiCl₄

• TiCl₄

Roasting of sulphides gives the gas X as a by-product. This is a colourless gas with the choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been isolated. The gas X is

• H₂S

• SO₂

• CO₂

• CO₂

Which is the strongest acid in the following?

• H₂SO₄

• HClO₃

• HClO₄

• HClO₄

Which of the following paramagnetic?

• CO

• O₂^-

• CN^-

• CN^-

Which of the following does not give oxygen on heating?

• KClO₃

• Zn(ClO₃)₂

• K₂Cr₂O₇

• K₂Cr₂O₇

Which of the following lanthanoid ions is diamagnetic?
(At. number; Ce =58, Sm =62, Eu =63, Yb = 70)

• Ce²⁺

• Sm²⁺

• Eu²⁺

• Eu²⁺

Identify the correct order of solubility in aqueous medium

• CuS> ZnS> Na₂S

• ZnS > Na₂S> CuS

• Na₂S> CuS> ZnS

• Na₂S> CuS> ZnS

XeF₂ is isostructural with 

• TeF₂

• ICl^-₂

• SbCl₃

• SbCl₃