Tert-butyl methyl ether on treatment with hydrogen iodide in cold gives

• tert-butyl iodide and methyl iodide

• tert-butyl alcohol and methyl alcohol

• tert-butyl alcohol and methyl iodide

• tert-butyl iodide and methyl alcohol

What is the actual volume occupied by water molecules present in 20 cm³ of water?

• 20 cm³

• 10 cm³

• 40 cm³

• 24.89 cm³

Which one of the following is reduced by H₂O₂ in alkaline medium?

• Fe²⁺

• HOCl

• KMnO₄

• PbS

The reaction of H₂ is given below

H₂ + CO + R - CH = CH₂ → R - CH₂

-CH₂-CHO is specifically called as

• hydrogenation

• reduction

• hydroformylation

• dehydration

Which of the following undergoes reduction with hydrogen peroxide in alkaline medium?

• Mn²⁺

• FeO

• PbS

• HOCl

Which one of the following pairs of substances will not produce hydrogen when reacted together?

• Copper and conc. nitric acid

• Ethanol and metallic sodium

• Magnesium and steam

• Phenol and metallic sodium

The hardness of water samle containing 0.002 mole of magnesium sulphate dissolved in a litre of water is expressed as

• 20 ppm

• 200 ppm

• 2000 ppm

• 120 ppm

When hydrogen peroxide is added to acidified potassium dichromate, a blue colour is produced due to formation of

• CrO₃

• Cr₂O₃

• CrO₅

• CrO${}_4^{2-}$

19.

The pH of a neutral water is 6.5. Then the temperature of water

• is 25°C

• is more than 25°C

• is less than 25°C

• can be more or less than 25°C

Hydrogen peroxide when added to a solution of potassium permanganate acidified with sulphuric acid:

• forms water only

• acts as an oxidizing agent

• acts as a reducing agent

• produces hydrogen