CBSE
Multiple Choice QuestionsThe IUPAC name of is:
3,4-dimethylpentanoyl chloride
1-chloro-1-oxo-2, 3-dimethyl pentane
2-ethyl -3-ethylbutanonyl chloride
2-ethyl -3-ethylbutanonyl chloride
The correct statement regarding electrophile is
Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile
Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is
Sublimation
Chromatography
Crystallisation
Crystallisation
Which one of the following pairs of species has the same bond order?
CO, NO
O2, NO+
CN–, CO
CN–, CO
Which of the following molecules represents the order of hybridisation sp2, sp2, sp, sp from left to right atoms?
HC≡C-C≡CH
CH2=CH-C≡CH
CH3-CH=CH-CH3
CH2=CH-CH=CH2
Which of the following is correct with respect to – I effect of the substituents? (R = alkyl)
-NH2 <- OR < - F
-NR2 <- OR <-F
-NR2 >-OR>-F
-NH2>-OR>-F
When 2-methyl butyl bromide is treated with sodium ethoxide in ethanol, what will be the major product?
2-methyl but-2-ene
3-methyl but-1-ene
2-methyl but-1-ene
2-methyl sodium-butoxide
Duma's method involves the determination of nitrogen content in the organic compound in the form of
NH3
N2
NaCN
(NH4)2SO4
In Duma's method of estimation of nitrogen, 0.35 g of an organic compound gave 55 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be (Aqueous tension at 300 K = 15 mm)
16.45
17.45
14.45
15.45
Which of the following is not correct?
Ammonia is used as refrigerant
A mixture of Ca(CN)2 and C is known as nitrolim
A mixture of Ca(H2PO4),% and CaSO4.2H20 is known as superphosphate of lime
Hydrolysis of NCl3 gives NH3 and HOCl
