CBSE
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
Which one of the following pairs of species has the same bond order?
CO, NO
O2, NO+
CN–, CO
CN–, CO
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
The 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
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
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
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
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is
Sublimation
Chromatography
Crystallisation
Crystallisation
Duma's method involves the determination of nitrogen content in the organic compound in the form of
NH3
N2
NaCN
(NH4)2SO4
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