41.

The mass of glucose that should be dissolved in SO 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 :

• 1 g

• 3 g

• 6 g

• 18 g

Osmotic pressure observed when benzoic acid is dissolved in benzene is less than that expected from theoretical considerations .This is because :

• benzoic acid is an organic solute

• benzoic acid has higher molar mass than benzene

• benzoic acid gets associated in benzene

• benzoic acid gets dissociated in benzene

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

• NaCl

• Na₂S

• (NH₄)₃PO₄

• K₂SO₄

For a reaction A + B $\to$ C + D if the concentration of A is doubled without alterning the concentration of B , the rate gets doubled . If the concentration of B is increased by nine times without alterning the concentration of A , the rate gets tripled .The order of the reaction is :

• 2

• 1

• 3/2

• 4/3

Denatured alcohol is :

• ethanol + methanol

• rectified spirit + methanol + naphtha

• undistilled ethanol

• rectified spirit

Hofmann's bromamide reaction is used to convert :

• acid to alcohol

• alcohol to acid

• amide to amine

• amine to amide

Paracetamol is a/an :

• antipyretic

• analgesic

• Both (a) and (b)

• antimalarial

An alkyl halide reacts with alcoholic ammonia in a sealed tube , the product formed will be :

• a primary amine

• a secondary amine

• a tertiary amine

• a mixture of all the three

The reagent used in Clemmensen's reduction is :

• conc H₂SO₄

• Zn-Hg / conc HCl

• aq KOH

• alc KOH

The product formed when hydroxylamine condenses with a carbonyl compound is called :

• hydrazide

• oxime

• hydrazine

• hydrazone