981. Acetaldehyele cyanohydrin on acid hydrolysis yields___________________?
A. Tartaric acid
B. Propanoic acid
C. Lactic acid
D. Valeric acid

982. Which one exhibits aldol condensation____________________?
A. HCHO
B. C6H5CHO
C. Cl3CCHO
D. CH3COCH3

983. Which of the following is a symmetrical ketone___________________?
A. 3 – hexanone
B. acetone
C. butanone
D. 2-pentanone

984. In base catalyzed reaction of carbonyl compound the catalyst___________________?
A. increases the nucleophilic character of reagent
B. increases electrophilic character of carbonyl compound
C. acidic character of reagent
D. both a and b

985. A elements are named as alkali metals because_______________?
A. Their oxides are basic
B. Their oxide and hydroxides are water soluble
C. Both A & B
D. They are found in earth

986. Formula of Chile saltpetre is__________________?
A. NaNO3
B. CaCO3
C. Ba (NO3)2
D. NH4Cl

987. The oxides of beryllium BeO is_______________?
A. Acidic
B. Basic
C. Amphoteric
D. Neutral

988. Li is different from its family members due to____________________?
A. small size
B. high charge density
C. less electro positivity
D. all of the above

989. Carbonates of lithium are not stable like that of sodium due to________________?
A. Low electronegativity
B. Low electro positivity
C. Low charge density
D. Not known yet

990. Which one of the following is not an alkali metal ?
A. Francium
B. Caesium
C. Rubidium
D. Radium