1) The correct formula of nitric acid is __________. A) H2CO3 B) HC2H3O2 C) HNO3

Question

1) The correct formula of nitric acid is __________.

A) H2CO3

B) HC2H3O2

C) HNO3

D) H3PO4

2) The conjugate acid of HCO3- is

__________.

A) CO2 -2

B) CO3 -2

C) H2CO3

D) H3CO3-

3) Which equation has 1: 1: 1: 1 as the relative ratio of coefficients when balanced?

A) NaOH + HCl ? NaCl + H2O

B) H2SO4 + KOH ? K2SO4 + H2O

C) C2H4 + O2 ? CO2 + H2O

D) Zn + HCl ? H2 + ZnCl2

4) The precipitate formed when potassium phosphate and silver nitrate are placed in a test tube is __________.

A) potassium phosphate

B) silver phosphate

C) potassium nitrate

D) No precipitate will be formed.

5) If the ions Ca2+, CO32-, Na+, and NO3- are placed in a test tube, the precipitate formed is __________.

A) NaNO3

B) Ca(NO3)2

C) Na2CO3

D) CaCO3

6) Which equation has 1: 2: 1: 1 as the relative ratio of coefficients when balanced?

A) Zn + HCl ? H2 + ZnCl2

B) H2SO4 + KOH ? K2SO4 + H2O

C) C2H4 + O2 ? CO2 + H2O

D) NaOH + HCl ? NaCl + H2O

7) Which element may have an oxidation number of +1 or -1?

A) hydrogen

B) potassium

C) sodium

D) lithium

8) The acid in the forward reaction HCO3- + H2O ? H2CO3 + OH- is

__________.

A) OH-

B) HCO3

C)H2CO3

D) H2O

9) The conjugate base of HCO3- is

__________.

A) CO2 -2

B) CO3 -2

C) H3CO3+

D) H2CO3

10) A drop of a full unit in the pH scale __________.

A) reduces the acidity tenfold

B) increases the acidity twofold

C) reduces the acidity twofold

D) increases the acidity tenfold

Explanation / Answer

1) The correct formula of nitric acid is __________.

D) H3PO4

2) The conjugate acid of HCO3- is

__________.

B) CO3 -2

3) Which equation has 1: 1: 1: 1 as the relative ratio of coefficients when balanced?

A) NaOH + HCl ? NaCl + H2O

4) The precipitate formed when potassium phosphate and silver nitrate are placed in a test tube is __________.

C) potassium nitrate

5) If the ions Ca2+, CO32-, Na+, and NO3- are placed in a test tube, the precipitate formed is __________.

B) Ca(NO3)2

6) Which equation has 1: 2: 1: 1 as the relative ratio of coefficients when balanced?

A) Zn + HCl ? H2 + ZnCl2

7) Which element may have an oxidation number of +1 or -1?

A) hydrogen

8) The acid in the forward reaction HCO3- + H2O ? H2CO3 + OH- is

__________.

B) HCO3

9) The conjugate base of HCO3- is

__________.

C) H3CO3+

10) A drop of a full unit in the pH scale __________.

C) reduces the acidity twofold

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