Chemistry quiz for zoology 2nd semester

Which of the following carbocation is most stable?

• CH3C +

• CH3CH2+

• CH3----C+---CH3

• C+ (CH3)3

Inductive effect involves

• Sigma electrons

• Pi electrons

• Both

• None

Which one is more stable

• RHC=CH3

• RHC=CHR

• R2C=CRH

• CH3=CH3

Which of the following is strong acid ?

• CHCl2-COOH

• CHClBr-COOH

• CH2F-COOH

• CHCl I2-COOH

Most acidic among the following is

• 
• 
• 
• None of above

The correct order of acidic strength of the following compound is :

(1) CH3-CH2-COOH

(2) CH3-CH (CN) -COOH

( 3) CH3-CH (Cl) -COOH

(4) CH3-CH(NO2)-COOH

• 4>3>2>1

• 4>2>3>1

• 3>4>2>1

• 2>3>4>1

The order of stability of the following carbocation

• III>II>I

• II>III>I

• III>I>II

• I>II>III

Which of the following pairs does not show an acid and its conjugate base?

• NH3 AND NH2-

• NH4+ AND NH3

• NH4+ AND NH2-

• H3PO4 AND H2PO4-

Basicity of which of following is more

• Sp3

• Sp2

• Sp

• Sp3d

Hyperconjugation involves

• Delocalization of σ-electrons into an adjacent π-bond

• Delocalization of n-electrons into an adjacent double bond

• Delocalization of

  π-electrons into an adjacent

  π-bond

• All are true.