571.

The IUPAC name of CH₃-CH₂-CHO is :

• propanal-1

• 2-methylbutanal

• butanal-1

• pentanal-1

Vinyl chloride undergoes :

• only addition reaction

• only elimination reactions

• both (a) and (b)

• substitution reactions

Which of the following increases the octane number?

• Branching of chain

• Absence of double and triple bond

• Non-cyclic alkanes

• None of the above

An organic compound having molecular mass 60 is found to contain C = 20%, H = 6.67% and N = 46.67% while rest is oxygen. On heating it gives NH₃ alongwith a solid residue. The solid residue give violet colour with alkaline copper sulphate solution. The compound is

• CH₃CH₂CONH₂

• (NH₂)₂CO

• CH₃CONH₂

• CH₃NCO

Geometrical isomers can exist for:

• CH₃CH(CH₃)CH₂CH₂CH₃

• CH₃CH=CH.CH₃

• CH₃CH=CH₂

• ClH₂C-CH₂Cl

Which of the following will have a meso-isomer also?

• 2-chlorobutane

• 2,3-dichlorobutane

• 2,3-dichloropentane

• 2-hydroxypropanoic acid

In this reaction

CH₃CHO + HCN → CH₃CH(OH)CN $\stackrel{\mathrm{H}.\mathrm{OH}}{\to }$ CH₃CH(OH)COOH

an asymmetric centre is generated. The acid obtained would be

• 50% D + 50% L-isomer

• 20% D + 80% L-isomer

• D-isomer

• L-isomer

Which one of the following octahedral complexes will not show geometrical isomerism? (A and B are monodentate ligands)

• [MA₄B₂]

• [MA₅B]

• [MA₂B₄]

• [MA₃B₃]

According to IUPAC nomenclature sodium nitroprusside is named as

• sodium pentacyanonitrosyl ferrate (II)

• sodium pentacyanonitrosyl ferrate (III)

• sodium nitroferricyanide

• sodium nitroferrocyanide

The IUPAC name for

• 5-chloro-hex-2-ene

• 2-chloro-hex-5-ene

• 1-chloro-1-methyl-pent-3-ene

• 5-chloro-5-methyl-pent-2-ene