Home / JEE 2011 / General Questions / Chemistry

JEE 2011 :: General Questions :: Chemistry




<<•2•3•4•5•6•7•>>
21.

The difference in the oxidation numbers of the two types of sulphur atoms in  $Na_{2}S_{4}O_{6}$ is


A) 4

B) 3

C) 5

D) 2



22.

A decapeptide (molecular weight 796) on complete hydrolysis gives glycine (molecular weight 75), alanine and phenylalanine. Glycine contributes 47 .0% of the total weight of hydrolysed products. The number of glycine units present in the decapeptide is


A) 6

B) 5

C) 4

D) 3



23.

The work function ($\phi$) of some metals is Listed below. The number of metals which will show a photoelectric effect when the light of 300 nm wavelength falls on the metal is

7122021762_g1.PNG


A) 5

B) 4

C) 3

D) 2



24.

The total number of alkenes possible by dehydrobrornination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is


A) 2

B) 3

C) 4

D) 5



25.

The reaction of $Br_{2}$ with$Na_{2}CO_{3}$ in an aqueous solution gives sodium bromide and sodium bromate with evolution of$CO_{2}$ gas. The number of sodium bromide molecules involved in the balanced chemical equation is


A) 4

B) 6

C) 5

D) 8



<<•2•3•4•5•6•7•>>