341. The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?
A. 0.065gm
B. 0.65gm
C. 6.5gm
D. 7.5gm

342. Which of the following compounds is not soluble in HNO3___?
A. CuS
B. CdS
C. PbS
D. AgCl

343. Following are the anions of soap which form Ca and Mg ions which we see as curd in water
A. Sodium hexadecanoate
B. Sodium octadecanoate
C. Sodium pentadecanoate
D. Both A & B

344. The hybridization of nitrogen atom in pyridine is_______?
A. Sp
B. Sp2
C. Sp3
D. It is not hybridized

345. The IUPAC name of pyridines is__________?
A. Azolo
B. Azine
C. Azolidins
D. Diazine

346. How many isomeric aldoses are possible for the molecular formula C6H12O6?
A. 2
B. 4
C. 7
D.16

347. The systematic name of sucrose is_______?
A. 1-α-D- glucopyranosyl-2-β-D-fructopyranoside
B. 11-α-D-glucopyranosyl-2-β-D-fructofuranoside
C. 1-α-D- glucofuranosyl-2-α-D- fructopyranoside
D. 1-β- D- glucofuranosyl-2-α- D- fructofuranoside

348. Treatment of sucrose with conc. HNO3 gives__________?
A. Nitrosucrose
B. Glucose+ fructose
C. Oxalic acid
D. Laevulinic acid

349. Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
A. e
B. 2e
C. 3e
D. 4e

350. Elements which emit natural radioactivity are known as __________ ?
A. Radio elements
B. Active elements
C. Radioactive elements
D. Nuclear elements