11.

Very pure hydrogen (99.9%) can be made by which of the following processes?

• Reaction of methane with steam

• Mixing natural hydrocarbons of high molecular weight

• Electrolysis of water

• Electrolysis of water

Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?

• Tertiary butyl chloride

• Neopentane

• Isohexane

• Isohexane

Which among the following will be named as dibromidobis(ethylene diamine)chromium(III) bromide?

• [Cr(en)₃]Br₃

• [Cr(en)₂Br₂]Br

• [Cr(en)Br₄]^-

• [Cr(en)Br₄]^-

Which method of purification is represented by the following equation

• zone refining

• cupellation

• Polling

• Polling

Lithium forms body centred cubic structure. The length of the side of its unit cell is 351 pm. Atomic radius of the lithium will be

• 75 pm

• 300 pm

• 240 pm

• 240 pm

The molecule having smallest bond angle is

• NCl₃

• AsCl₃

• SbCl₃

• SbCl₃

The density of a solution prepared by dissolving 120 g of urea (mol. Mass = 60 u ) in 1000g of water is 1.15 g/mL. The molarity of this solution is

• 0.50 M

• 1.78 M

• 1.02 M

• 1.02 M

According to Freundlich adsorption isotherm, which of the following is correct?

Which one of the following statements is correct?

• All amino acids except lysine are optically active

• All amino acids are optically active

• All amino acids except glycine are optically active

• All amino acids except glycine are optically active

How many chiral compounds are possible on monochlorination of 2–methyl butane?

• 8

• 2

• 4

• 4