The correct set of four Quantum numbers for outermost electron of Potassium (Z = 19) is

299     .The correct set of four Quantum numbers for outermost electron of Potassium (Z = 19) is

(A) 4, 0, 0, 

(B) 3, 0, 0, 

(C) 4, 1, 0, 

(D) 3, 1, 0, 

Answer:: (A)

300.    The correct statement with regard to   and   is

(A)  is more stable than   

(B)   is more stable than   

(C) Both   and   are equally stable 

(D) Both   and   do not exist

Answer:: (B)

301.    The monomers of Buna-S rubber are

(A) vinyl chloride and sulphur

(B) butadiene

(C) styrene and butadiene

(D) isoprene and butadiene

Answer:: (C)

302.    The noble gas mixture is cooled in a coconut bulb at 173 K. The gases that are not adsorbed are

(A) He and Ne

(B) Ar and Kr

(C) He and Xe

(D) Ne and Xe

Answer:: (A)

303.    Which one of the following shows functional isomerism?

(A) CH₂Cl₂

(B) C₂H₅OH

(C) C₃H₆

(D) C₂H₄

Answer:: (B)

304.    The number of disulphide linkages present in insulin are

(A) 1

(B) 2

(C) 3

(D) 4

Answer:: (B)