Free Printable POC: Quiz 3

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POC: Quiz 3

Total questions: 15

Worksheet time: 45mins

Name

Class

Date

Which of the statements below are true about the definitions of ACID according to Arrhenius, Bonsted-Lowry and Lewis.

I. proton acceptor

II. electron-pair donor

III. proton donor

IV. electron-pair acceptor

I and II

I and IV

II and III

III and IV

Which of the following species is the conjugate acid for CH₃NH₂?

CH₃NH₃⁺

CH₃NH⁺

CH₃NH^-

CH₃NH₂^-

Which of the following salts produces a solution with pH greater than 7 when it is dissolved in water?

Sodium Chloride

Ammonium Chloride

Sodium carbonate

Potassium bromide

Which of these examples below are STRONG ACIDS?

I. H₂SO₄

II. HClO₄

III. HSO₄^-

IV. HF

I and II

I and IV

II and III

III and IV

A typical blood sample has a pH of 7.4. What is its hydrogen ion concentration?

5.98 × 10^-5 M

2.98 × 10^-6 M

3.98 × 10^-8 M

4.98 × 10^-7 M

What is the pH of 0.035 M LiOH?

1.46

7.52

8.43

12.54

The acid dissociation constant of HF is 7.0 × 10^-4. Determine K_b for its conjugate base F^-.

1.7 × 10^-11

1.4 × 10^-11

1.4 × 10^-10

1.7 × 10^-9

Which of these are true about a buffer solution?

I. made up of a mixture of weak base and salt of its conjugate acid

II. made up of a mixture of strong acid and salt of its conjugate base

III. resist changes in pH with addition of base only

IV. resist changes in pH with addition of acid or base

I and II

I and IV

II and III

III and IV

According to the VSEPR theory, if there are five electrons domains in the valence shell of an atom, they will be arranged in a ____ geometry.

Seesaw

trigonal pyramidal

trigonal bipyramidal

Octahedral

10.

What is the electron domain geometry of OCl₂?

Tetrahedral

Trigonal pyramidal

Angular/bent

Trigonal planar

11.

What is the total number of sp, sp² and sp³ hybridizations found on the carbon and nitrogen atoms in the molecule?

sp = 3, sp² = 2 and sp³ = 2

sp = 2, sp² = 2 and sp³ = 3

sp = 2, sp² = 3 and sp³ = 2

sp = 3, sp² = 2 and sp³ = 3

12.

Which molecule has polar bonds but zero dipole moment?

H₂O

NH₃

CO₂

CH₃Cl

13.

Which of the following is correct?

14.

The diagram shows the molecular orbital energy level diagram of Be₂ molecule. What is the bond order of Be₂⁺?

0.5

15.

The valence electrons of N₂is represented in a molecular orbital energy level diagram as shown below. What is the bond order of N₂, N₂^- and N₂^2-?

3, 2 $\frac{1}{2}$ , 2

3, 2, 2 $\frac{1}{2}$

2, 2 $\frac{1}{2}$ , 3

2, 3, 2 $\frac{1}{2}$

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POC: Quiz 3

Total questions: 15

Worksheet time: 45mins

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