Chemistry : Organic Chemistry – Some Basic Principles and Techniques

On addition of conc. H₂SO₄ to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet fumes come out. This is because

• H₂SO₄ reduces HI to I₂

• HI is of violet colour

• HI gets oxidised to I₂

• HI changes to HIO₃

Affinity for hydrogen decreases in the group from fluorine to iodine. Which ofthe halogen acids should have highest bond dissociation enthalpy?

• HF

• HCl

• HBr

• HI

Acetic anhydride is prepared in the laboratory by heating sodium acetate with

• ethyl chloride

• acetyl chloride

• conc. H₂SO₄

• zinc dust

The IUPAC name of acryldehdye is

• prop-2-en-l-al

• propenylaldehyde

• but-2-en-l-al

• propenal

The structures of (CH₃)₃CBr and CH₃[CH₂]₃ Br represent

• chain isomerism

• position isomerism

• chain as well as position isomerism

• functional isomerism

Petrol for aviation purpose must contain

• straight chain hydrocarbons

• aromatic hydrocabrons

• olefinic hydrocarbons

• highly branched chain paraffins

The solubility product of Hg₂l₂ is equal to

• $\left[{\mathrm{Hg}}_2^{2+}\right]\left[{\mathrm{I}}^{-}\right]$

• [Hg²⁺][I^-]

• $\left[{\mathrm{Hg}}_2^{2+}\right]{\left[{\mathrm{I}}^{-}\right]}^2$

• [Hg²⁺][I^-]²

Which of the following fluorides does not exist?

• NF₅

• PF₅

• AsF₅

• SbF₅

IUPAC name of (CH₃)₃ CCl is

• n-butyl chloride

• 3-chloro butane

• 2-chloro-2-methylpropane

• t-butyl chloride

The isomerism that arises due to restricted bond rotation is

• metamerism

• optical isomerism

• position isomerism

• geometrical isomerism