981 Among the halogens the rare element is________________? Chemistry Medium Full question → A Fluorine B Chlorine C Astatine D Iodine
982 Ethanol and methanol can be distinguished by a__________________? Chemistry Medium Full question → A Iodoform test B Lucas test C Benedicts test D Tollens test
983 The hydrogenation of phenol in the presence of Ni and heat gives_________________? Chemistry Medium Full question → A cyclohexane B n – hexane C 1 – hexanol D cyclohexanol
984 Phenol was isolated by Runge from________________? Chemistry Medium Full question → A vegetable oil B coaltar C wood D none of these
985 Absolute alcohol is obtained when rectified spirit is treated with__________________? Chemistry Medium Full question → A Ca(OH)2 B CaCO3 C CaCl2 D CaO
986 Methanol can be obtained from_________________? Chemistry Medium Full question → A water gas B destructive distillation of wood C methane D all
987 Ethanol can be converted into ethanoic acid by_________________? Chemistry Medium Full question → A Hydrogenation B Hydration C Oxidation D Fermentation
988 Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________? Chemistry Medium Full question → A oxidation B elimination C condensation polymerization D additional polymertization
989 Heating phenol with Zn will yield_________________? Chemistry Medium Full question → A Benzene B Benzoic acid C Phenoxide D Cyclohexane
990 Which compound is also known by the name of carbolic acid ? Chemistry Medium Full question → A C2H2OH B H2CO3 C C6H5OH D H3PO3
991 Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ? Chemistry Medium Full question → A Primary alcohol B Secondary alcohol C Tertiary alcohol D All of above
992 K2Cr2O7/H2SO4 generate____________________? Chemistry Medium Full question → A Oxygen B Hydrogen C Nascent oxygen[O] D Nascent hydrogen[H]
993 The process of fermentation of starch involve many enzymes the sequence of enzymes used are____________________? Chemistry Medium Full question → A Diastase-maltase-zymase B Zymase-maltase-diastase C Maltase-diastase-zymase D Diastase-zymase-maltase
994 The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________? Chemistry Medium Full question → A Mother liquor B Filterate C Extract D Molasses
995 Which one of the following is also known as tartaric acid ? Chemistry Medium Full question → A 2 3-dihydroxy butance 1 4 -dioic acid B 2 3 -dihydroxy butanedioic acid C 2 3 -dihydroxy butanioc acid D 2 2 -dihydroxy butanoic acid
996 Which one of the following is termed as benzul alcohol ? Chemistry Medium Full question → A C6H5OH B C6H5CH(OH)2 C C6H5CH2OH D C6H5COOH
997 Alkyl halides undergo a type of reaction_________________? Chemistry Medium Full question → A Nucleophilic substitution B Nucleophilic addition C Elimination D both A & C
998 Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________? Chemistry Medium Full question → A primary alcohol B secondary alcohol C tertiary alcohol D dihydric alcohol
999 Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________? Chemistry Medium Full question → A formaldehyde B ketone C ethylene epoxide D both A & C
1000 Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________? Chemistry Medium Full question → A they have an electrophilic carbon B they have an electrophilic carbon & a good leaving group C they have an electrophilic carbon & a bad leaving group D they have a nucleophilic carbon & a good leaving group