Formula of felspar is

• K₂O.Al₂O₃.6.SiO₂

• K₂O₃.Al₂O₃.6Si₂O₂.2H₂O

• Al₂O₃.2SiO₂.2H₂O

• 3MgO.4SiO₂.H₂O

When condensation product of hexamethylenediamine and adipic acid is heated to 353 K (80° C) in an atmosphere of nitrogen for about 4-5 h, the product obtained is:

• solid polymer of nylon 66

• liquid polymer of nylon 66

• gaseous polymer of nylon 66

• Liquid polymer of nylon 6

Which of the following is used to detect aldehydes?

• Millon's test

• Tollen's reagent

• Neutral ferric chloride solution

• Molisch's test

Complete the following reaction
RNH₂ + H₂SO₄   →

• [RNH₃]⁺HSO^-₄

• $[{\mathrm{RNH}}_3{]}_2^{+}{\mathrm{SO}}_4^{2-}$

• RNH₂.H₂SO₄

• no reaction

Primary amine (RNH₂) reacts with nitrous acid to give

• ${\mathrm{RNH}}_3^{+}{\mathrm{NO}}_2$

• ROH

• ROR

• None of these

IUPAC name of CH₃—CHNH₂—CH₃ is

• dimethyl amine

• 2-amino propane

• isopropylamine

• 2-propanamine

37.

Fruity smell is given by

• esters

• alcohols

• chloroform

• acid anhydrides

Dimethyl ether and ethyl alcohol are

• metamers

• homologues

• functional isomers

• position isomers

CH₃COOC₂H₅ with excess of C₂H₅MgBr and hydrolysis gives

Which of the acids cannot be prepared by Grignard reagent?

• Acetic acid

• Succinic acid

• Formic acid

• All of these