In chlorination benzene, the reactive species is

• Cl⁺

• Cl^-

• Cl₂

• Cl₂^-

The number of moles of proton which can be easily given by butyne-1 (1 mole) is

• 1

• 2

• 3

• 6

The addition of HBr is easiest with

• CH₂=CHCl

• ClCH=CHCl

• CH₃-CH=CH₂

• (CH₃)₂C=CH₂

Formation of 2-butene as major product by dehydation of 2-butanol is according to

• Markownikoff's rule

• Saytzeff's rule

• Peroxide effect

• Anti-Markownikoffs rule

Which of the ions having following electronic structure would have maximum magnetic moment?

• 1s², 2s², 2p⁶,3s²,3p⁶,3d³

• 1s², 2s², 2p⁶,3s²,3p⁶,3d⁵

• 1s², 2s², 2p⁶,3s²,3p⁶,3d⁷

• 1s², 2s², 2p⁶,3s²,3p⁶,3d⁹

Chlorine atom differs from chloride in the number of which of the following?

• Protons

• Neutrons

• Electrons

• Both (a) and (c)

Which of the following does not have the hydrogen bond?

• Phenol

• Liquid NH₃

• Water

• Liquid HCl

The vapour pressure ofa pure liquid 'A' is 0.80 atm. When a non-volatile solute 'B' is dissolved in 'A' its vapour pressure becomes 0.60 atm. The mole fraction of 'B' in the solution is

• 0.125

• 0.25

• 0.50

• 0.75

49.

Which of the following does not show negative deviation from Raoult's law?

• Acetone -Chloroform

• Acetone-Benzene

• Chloroform- Ether

• Chloroform- Benzene

In CsCl structure, the coordination number of Cs⁺ is

• equal to that of Cl, that is 6

• equal to that of Cl, that is 8

• not equal to that of Cl, that is 6

• not equal to that of Cl, that is 8