Pick out the correct statement(s).

1. Manganese exhibits +7 oxidation state
2. Zinc forms coloured ions
3. [CoF₆]^3- is diamagnetic
4. Sc forms +4 oxidation state
5. Zn exhibits only +2 oxidation state

• 1 and 2

• 1 and 5

• 2 and 4

• 3 and 4

The maximum oxidation state exhibited by actinide ions is

• +5

• +4

• +7

• +8

he amount of solute (molar mass 60 g mol^-1) that must be added to 180 g of water so that the vapour pressure· of water is lowered by 10%, is

• 30g

• 60g

• 120g

• 12g

Which of the following species can function both as oxidising as well as reducing agent?

• Cl^-

• ${\mathrm{ClO}}_4^{-}$

• ClO^-

• ${\mathrm{MnO}}_4^{-}$

One Faraday of electricity is passed through molten Al₂O₃ , aqueous solution of CuSO₄ and molten NaCl taken in three different electrolytic cells connected in series. The mole ratio of Al, Cu and Na deposited at the respective cathode is

• 2: 3: 6

• 2: 3: 6

• 6 : 3 : 2

• 1 : 2: 3

36.

Half-lives of a first order and a zero order reactions are same. Then, the ratio of the initial rates of first order reaction to that of the zero order reaction is

• 1/0.693

• 2 ×0.693

• 0.693

• 6.93

The dispersed phase and dispersion medium in soap lather are respectively

• gas and liquid

• liquid and gas

• solid and gas

• solid and liquid

In petrochemical industry, alcohols are directly converted to gasoline by passing over heated

• platinum

• ZSM-S

• iron

• nickel

Which among the following statements are true for the complex [Co(NH₃)₆][Cr(CN)₆]?

1. It is a non-electrolyte
2. The magnitude of the charge on each complex ion is 3
3. The complex will not conduct current
4. The complex will exhibit coordination isomerism
5. The magnitude of the charge on each complex ion is 1

• 2 and 4

• 1 and 4

• 3 and 5

• 1 and 2

An example of ambidentate ligand is

• thiocyanato

• aquo

• chloro

• ammine