Formula of felspar is
K2O.Al2O3.6.SiO2
K2O3.Al2O3.6Si2O2.2H2O
Al2O3.2SiO2.2H2O
3MgO.4SiO2.H2O
A.
K2O.Al2O3.6.SiO2
Felspar is ore of Al. Its composition is KAlSi3O8 or K2O.Al2O3.6.SiO2 .
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
Which of the acids cannot be prepared by Grignard reagent?
Acetic acid
Succinic acid
Formic acid
All of these