The highest magneticmoment is shown by the transition metal ion with the configuration :

• 3d²

• 3d⁵

• 3d⁷

• 3d⁹

In which of the following complex ion, the central metal ion is in a state of sp³d² hybridisation?

• [CoF₆]^3-

• [Co(NH₃)₆]³⁺

• [Fe(CN)₆]^3-

• [Cr(NH₃)₆]³⁺

33.

Which of the following can participate in linkage isomerism?

• NO${}_2^{-}$

• ${\mathrm{H}}_2\stackrel{··}{\mathrm{N}}{\mathrm{CH}}_2{\mathrm{CH}}_2\stackrel{··}{\mathrm{N}}{\mathrm{H}}_2$

• H₂O

• :NH₃

The concentration of a reactant X decreases from 0.1 M to 0.005 Min 40 minute. If the reaction follows 1 order kinetics, the rate of the reaction when the concentration of X is 0.01 M will be :

• 1.73 × 10^-4 M min^-1

• 3.47 × 10^-4 M min^-1

• 3.47 × 10^-5 M min^-1

• 7.5 × 10^-5 M min^-1

When a quantity of electricity is passed through CuSO₄ solution, 0.16 g of copper gets deposited. If the same quantity of electricity is passed through acidulated water, then the volume of H₂ liberated at STP will be : [given : atomic weight of Cu = 64]

• 4.0 cm³

• 56 cm³

• 604 cm³

• 8.0 cm³

Which one of the following condition will increase the voltage of the cell represented by the equation?

Cu(s) + 2Ag⁺(aq) $\rightleftharpoons$Cu²⁺(aq) + 2Ag(s)

• Increase inthe dimension of Cu electrode

• Increase in the dimension of Ag electrode

• Increase inthe concentration of Cu²⁺ ion.

• Increase in the concentration of Ag⁺ ions.

The mass of glucose that should be dissolved in 50 g of water in order to produce the same lowering of vapour pressure as is produced by dissolving 1 g of urea in the same quantity of water is:

• 1g

• 3g

• 6g

• 18g

Which of the following electrolyte will have maximum flocculation value for Fe(OH)₃ sol?

• NaCl

• Na₂S

• (NH₄)₃PO₄

• K₂SO₄

The radii of Na⁺ and Cl^- ions are 95 pm and 181 pm respectively. The edge length of NaCl unit cell is :

• 276 pm

• 138 pm

• 552 pm

• 415 pm

The formula mass of Mohr's salt is 392. The iron present in it is oxidised by KMnO₄ in acid medium. The equivalent mass of Mohr's salt is :

• 392

• 31.6

• 278

• 156