• Chemistry - Section 1
41. 

The gas used for artificial ripening of green fruit is

A. ethylene
B. एटैन
C. कार्बन डाइआक्साइड
D. एसिटिलीन

42. 

Zone refining is used for the purification of

A. Au
B. जीई
C. एजी
D. घन

43. 

The molecule which has the highest percentage of ionic character among the following is

A. HI
B. एचएफ
C. एचसीआई
D. HBR

44. 

The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is

A. cineole
B.

इगेनोल 

C.

गेरानिओल 

D.

लाइमीन


45. 

The high reactivity of fluorine is due to

A. its high electro negativity
B.

फ्लोरीन परमाणु के छोटे आकार

C.

डी-ऑर्बिटल्स की उपलब्धता

D.

मजबूत एफ - एफ बॉन्ड