31.

The rate constant of a reaction depends on

• the temperature of a reaction

• the time of a reaction

• the extent of reaction

• the initial conc. of the reactant

The half life of a radioactive element is 40 days. Calculate the average life

• 5.76 days

• 57.6 days

• 646 days

• 4.56 days

How much chlorine will be liberated on passing one ampere current for 30 min. through NaCl solution ?

• 0.66 mole

• 0.33 mole

• 0.66 g

• 0.33 g

Phenol and benzoic acid are distinguished by

• NaOH

• NaHCO₃

• Na₂CO₃

• H₂SO₄

Phenol reacts with chloroform in presence of

• H₂SO₄

• KOH

• NaNO₂/ HCl

• G.R.

CH₃CH₂C$\equiv$CH $\stackrel{\mathrm{R}}{\to }$ butanone-2. R is

• Hg⁺⁺/ dil.H₂SO₄

• KMnO₄

• KClO₃

• K₂Cr₂O₇

Strongest nucleophile is

• RNH₂

• ROH

• C₆H₅O^-

• CH₃O^-

Which is used as medicine?

• PVC

• Terylene

• Glyptal

• Urotropine

Which of the following compound gives iodoform test?

• CH₃CN

• CH₃OH

• CH₃COCH₃

• C₆H₅OH

Substance having ester linkage is

• bakelite

• polythene

• PVC

• terylene