GOC JEE

Which one the following does not have sp² hybridized carbon?

• Acetone

• Acetamide

• Acetonitrile

• Acetic acid

Due to the presence of an unpaired electron, free radicals are

• Chemically reactive

• Chemically inactive

• Anions

• Cations

Which types of isomerism is shown by 2,3-dichlorobutane?

• Diastereo

• Optical

• Geometric

• Structural

The correct order of increasing basicity of the given conjugate base (R =CH₃) is:

(1) RCOO^– < HC ≡ C^– < NH₂^– < R^–

(2) RCOO^– < HC ≡ C^– < R^– < NH₂

(3) R^– < HC ≡ C^– < RCOO^– < NH₂^–

(4) RCOO < NH₂ < HC ≡ C^– < R^–

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The conjugate base of hydrazoic acid is :-

(1) NH₃^–

(2) N₃^–

(3) N₂^–

(4) N^-3

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Increasing order of stability among the three main conformations (i.e. Eclipse, Anti, Gauche) of 2-fluoroethanol is

• Eclipse, Gauche, Anti

• Gauche, Eclipse, Anti

• Eclipse, Anti, Gauche

• Anti, Gauche, Eclipse

Which one of the following conformation of cyclohexane is chiral ?

• Twist boat

• Rigid

• Chair

• Boat

The order of basicity of amines in gaseous state is :

(1) 3⁰ > 2⁰ > NH₃ > 1⁰

(2) 1⁰ > 2⁰ > 3⁰ > NH₃

(3) NH₃> 1⁰ > 2⁰ > 3⁰

(4) 3⁰ > 2⁰ > 1⁰ > NH₃

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Ortho-Nitrophenol is less soluble in water than p– and m– Nitrophenols because:

• Melting point of o–Nitrophenol is lower than those of m– and p– isomers

• o–Nitrophenol is more volatile in steam than those of m– and p– isomers

• o–Nitrophenol shows Intramolecular H–bonding

• o–Nitrophenol shows Intermolecular H–bonding

Among the following oxoacids, the correct decreasing order of acid strength is :

(1) HClO₄ > HClO₃ > HClO₂ > HOCl

(2) HClO₂ > HClO₄ > HClO₃ > HOCl

(3) HOCl > HClO₂ > HClO₃ > HClO₄

(4) HClO₄ > HOCl > HClO₂ > HClO₃

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