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

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

24.

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