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Published on: 25/09/2019
Term 2 Acids, Bases and Salts
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Questions + Answers key
Take MCQ Science Test1.
Interpret: NHSO4 is an acid salt
2.
Interpret: Al(OH)3 & Zn(OH)2 are not alkalis.
3.
Interpret: Acetic acid (CH3COOH) is a mono basic acid.
4.
Interpret: CH4 and NH3 are not acids
5.
Complete the equation
6.
Complete the equation Ca(OH)2+ ? ⟶ ?+H2O
7.
Complete the equation HCl+? ⟶ NaCl+H2O
8.
Complete the equation CaO+H2SO4 ⟶ ?+H2O
9.
Complete the equation Zn+? ⟶ Na2ZnO2+H2↑
10.
Complete the equation ZnO+2HCl ⟶ ?+?
11.
Complete the equation Na2CO3+2HCl ⟶ ?+? +CO2↑
12.
Complete the equation Mg+? ⟶ ?+H2
13.
Complete the equation H+ +H2O ⟶ ?
14.
Complete the equation HCl+ H2O ⟶ H3O+ +Cl-
15.
Non-metallic oxides are acidic in nature.
1.
It is formed by the partial replacement of hydrogen ion of sulphuric acid (H2SO4) by an metal present in sodium hydroxide (NaOH)
NaOH+H2SO4 ⟶ NaHSO4+H2O
2.
Al(OH)3 & Zn(OH)2 are water insoluble bases. So they bases not solution
3.
Though acetic acid contains four hydrogen atoms only one hydrogen can be replaced in its aqueous solution. So CH3COOH is a mono basic acid.
CH3COOH H+ + CH3COO-
4.
CH4 and NH3 do not produce hydrogen ion (H+) in its aqueous solution
5.
A = NH4Cl,B =NH3↑
C = HCl
D = NaHSO4,E=H2O
6.
Ca(OH)2+CO2 ⟶ CaCO3+H2O
7.
HCl+NaOH ⟶ NaCl+H2O
8.
CaO+H2SO4 ⟶ CaSO4+H2O
9.
Zn+2NaOH ⟶ Na2ZnO2+H2↑
10.
ZnO+2HCl ⟶ ZnCl2+H2O↑
11.
Na2CO3+2HCl ⟶ 2NaCl+H2O+CO2↑
12.
Mg+H2SO4 ⟶ MgSO4 +\({ H }_{ 2 }\uparrow \)
13.
H+ +H2O ⟶ H3O+
14.
HCl+ H2O ⟶ H3O+ +Cl-
15.
When non-metallic oxides react with bases, they can form a salt and water similar to the reaction of base with acids. So non-metallic oxides are acidic in nature.
| Ca(OH)2 | + | CO2 | \(\rightarrow\) | CaCO3 | + | H2O |
| (Base) | (non-metallic oxide) | (Salt) | (Water) | |||
| Calcium hydroxide | Carbon dioxide | calcium Carbonate |
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Tamilnadu Stateboard 9th Standard Subjects
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