The complex used as an anti-cancer agent is

• mer-[Co(NH₃)₃Cl₃]

• cis-[PtCl₂(NH₃)₂]

• cis-K₂[PtCl₂Br₂]

• Na₂[CoCl₄]

The colourless species is

• VCl₃

• VOSO₄

• Na₃VO₄

• [V(H₂O)]SO₄.H₂O

Lanthanide for which +II and +III oxidation states are common is

• La

• Nd

• Ce

• Eu

The mixture ofconcentrated HCl and HNO₃ made in 3 : 1 ratio contains

• ClO₂

• NOCl

• NCl₃

• N₂O₄

45.

The compound used for gravimetric estimation of copper(II) is

• Cu₂(SCN)₂

• Cu₂O

• Cu₂I₂

• Cu₂CO₃

In the extraction of copper from sulphide ore the metal is formed by reduction of Cu₂O with

• FeS

• CO

• Cu₂S

• SO₂

At higher temperature, iodoform reaction is given by

• CH₃CO₂CH₃

• CH₃CO₂C₂H₅

• C₆H₅CO₂CH₃

• CH₃CO₂C₆H₅

What is the co-ordination number of sodium in Na₂O?

• 6

• 4

• 8

• 2

Which one of the statements given below concerning properties of solutions, describes a colligative effect?

• Boiling point of pure water decreases by the addition of ethanol.

• Vapour pressure of pure water decreases by the addition of nitric acid.

• Vapour pressure of pure benzene decreases by the addition of naphthalene.

• Boiling point of pure benzene increases by the addition of toluene.

Which of the following reactions is used to make a fuel cell?

• Cd_(s) + 2Ni(OH)₃ → CdO_(s) + 2Ni(OH)_2(s) + H₂O_(l)

• Pb_(s) + PbO_2(s) + 2H₂SO_4(aq) → 2PbSO_4(s) + 2H₂O_(l)

• 2H_2(g) + O_2(g) →6 2H₂O_(l)

• 2Fe_(s) + O_2(g) + 4H⁺ _(aq) → 2Fe²⁺_(aq) + 2H₂O_(l)