21.

Identify the statement which is not correct regarding CuSO₄

• It react with KI to give iodine

• It react with KCl to give Cu₂Cl₂

• It react with NaOH and glucose to give Cu₂O.

• It gives CuO on strongly heating in air.

Transition metals usually exhibit highest oxidation states in their

• chlorides

• fluorides

• bromides

• iodides

The number of Faradays needed to reduce 4 g equivalents of Cu²⁺to Cu metal will be

• 1

• 2

• 1/2

• 4

Which one of the following cells can convert chemical energy of H₂ and O₂ directly into electrical energy?

• Mercury cell

• Daniell cell

• Fuel cel

• Lead storage cell

The activity of an old piece of wood is just 25% of the fresh piece of wood. If t_1/2 of C-14 is 6000 yr, the age of piece of wood is

• 6000 yr

• 3000 yr

• 9000 yr

• 12000 yr

The product 'A' is

• succinic acid

• melonic acid

• oxalic acid

• maleic acid

The formula of ethyl carbinol is

• CH₃OH

• CH₃CH₂OH

• CH₃CH₂CH₂OH

• (CH₃)₃COH

Which of the following gives red colour in Victor Meyer's test?

• n-propyl alcohol

• Isopropyl alcohol

• tert-butyl alcohol

• sec-butyl alcohol

When p-nitrobromobenzene reacts with sodium ethoxide, the product obtained is

• p-nitroanisole

• ethyl phenyl ether

• p-nitrophenetole

• no reaction occurs

Which of the following is a Gattermann aldehyde synthesis?