Which of the following compounds does not show optical isomerism?

• CH₃CH(OH)Br

• CH₃CH(OH)CH₃

• CH₃-CHOH-CHBr-CH₂OH

A mixture containing Cu²⁺ and Ni²⁺ can be separated for identification by

• passing H₂S in acid medium

• passing H₂S in alkaline medium

• passing H₂S in neutral medium

• passing H₂S in dry mixture

The indicator used in the titration of acetic acid with sodium hydroxide for quantitative estimation is

• phenolphthalein

• methyl orange

• methyl red

• a mixture of methyl red and methyl orange

The IUPAC, name of the compound

• 2-ethyl-3-methyl butane

• 2, 3-dimethyl pentane

• 2-methyl-3-ethyl butane

• 3,4-dimethyl pentane

195.

[Pt(NH₃)₄Cl₂]Br₂ and [Pt(NH₃)₄Br₂]Cl₂ are related to each other as

• optical isomers

• coordinate isomers

• ionisation isomers

• linkage isomers

Which one of the following substances is used as an anti-knock compound?

• Tetra ethyl lead

• Lead tetrachloride

• Lead acetate

• Ethyl acetate

How many isomeric butanes are there?

• 2

• 3

• 4

• 5

At normal room temperature iodoform is

• volatile liquid

• thick viscous liquid

• gas

• solid

The formula of freon-12 is

• CClF₃

• CH₂Cl₂

• CCl₂F₂

• CH₂F₂

C₂H₅Cl + aqNaOH → C₂H₅OH + NaCl; this reaction is

• electrophilic substitution of I order

• electrophilic substitution of II order

• nucleophilic substitution of I order

• nucleophilic substitution of II order