The correct order of the acidity of following acids is-CH3COOH, H

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 Multiple Choice QuestionsMultiple Choice Questions

571.

The aqueous solution of which one of the following is basic?

  • HOCl

  • NaHSO4

  • NH4NO3

  • NaOCl


572.

The pH of 10-7 M NaOH is

  • 7.01

  • between 7 and 8

  • between 9 and 10

  • greater than 10


573.

If H+ concentration of fruit juice is 3.3 × 10-2, then its pH will be

  • 4.8 basic

  • 4.8 neutral

  • 4.8 acidic

  • 1.6 acidic


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574.

The correct order of the acidity of following acids is-

CH3COOH, HCOOH, Cl-CH2COOH, F-CH2COOH, (Cl2)CHCOOH

  • Cl2CHCOOH > F-CH2COOH > Cl-CH2COOH > HCOOH > CH3COOH

  • F-CH2COOH > Cl-CH2COOH > Cl2CHCOOH > HCOOH > CH3COOH

  • HCOOH > CH3COOH > Cl-CH2COOH > Cl2CHCOOH > F-CH2COOH

  • None of the above


A.

Cl2CHCOOH > F-CH2COOH > Cl-CH2COOH > HCOOH > CH3COOH

Group or atom attached with -COOH group shows positive inductive effect increases electron density on oxygen atom, which suppress the ionisation of H+, hence, acidic strength decreases.

Group or atom attached with -COOH group shows negative inductive effect decreases electron density on oxygen atom, which facilitate the ionisation of H+, hence acidic strength increases.

Sequence of group shows negative inductive effect-

-CHCl2 > -CH2F > -CH2Cl

-CH3 group shows positive inductive effect and -H does not show any effect.

Therefore, the correct order is-

Cl2CHCOOH > F-CH2COOH > Cl-CH2COOH > HCOOH > CH3COOH


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575.

Zwitter ion is

  • a dipolar ion

  • ion formed from amino acid

  • internal salt

  • All of the above


576.

Solubility product of pure PbCl2 will be

  • Ksp = S2

  • Ksp = 4S3

  • Ksp = 108 S5

  • Ksp = S


577.

Which of the following statement is correct?

  • Basic nature increases on increasing pH

  • Basic nature decreases on increasing pH

  • Acidic nature increases on increasing pH

  • None of the above


578.

Which one of the following is conjugate acid of water in the reaction?

H2SO4 + H2 H3O+ + HSO4-

  • H2O

  • H3O+

  • SO42-

  • HSO4-


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579.

The product of H+ and OH- of water will be

  • Kw = 10-12

  • Kw = 10-14

  • Kw = 10-11

  • Kw = 10-10


580.

For NaCl, the Ksp = 36mol2 L-2, the molar concentration of it will be  

  • 136M

  • 116 M

  • 36 M

  • 6 M


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