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21st Century Pedagogy & Advanced Teacihing – Learning Tools
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ACIDS, BASES AND SALTS
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1 / 11
What is the color of phenolphthalein in basic solution?
Colorless::0;;Pink::1;;Red::0;;Blue::0
Indicators
Chemistry → Acids, Bases and Salts, Indicators, Remembering, 1 Mark
2 / 11
Baking soda is chemically known as —
Sodium carbonate::0;;Sodium bicarbonate::1;;Calcium carbonate::0;;Magnesium carbonate::0
Baking Soda
Chemistry → Acids, Bases and Salts, Compounds, Remembering, 1 Mark
3 / 11
Which of the following solutions has the highest concentration of hydrogen ions? \(H^+\)
“1 M NaOH::0″;;”1 M CH_3COOH::0″;;”1 M NH_4OH::0”
Strength of Acid
Chemistry → Acids, Bases and Salts, Acids, Remembering, 1 Mark
4 / 11
Which acid is present in curd?
Citric acid::0;;Lactic acid::1;;Acetic acid::0;;Hydrochloric acid::0
Organic Acids
Chemistry → Acids, Bases and Salts, Acids in Daily Life, Understanding, 1 Mark
5 / 11
Identify the compound used in antacid tablets to relieve acidity.
Sodium chloride::0;;Sodium hydroxide::0;;Magnesium hydroxide::1;;Calcium carbonate::0
Antacid Action
Chemistry → Acids, Bases and Salts, Neutralization, Understanding, 1 Mark
6 / 11
Which of the following solutions turns blue litmus red?
Sodium hydroxide::0;;Ammonium hydroxide::0;;Hydrochloric acid::1;;Calcium hydroxide::0
Acids and Bases
Chemistry → Acids, Bases and Salts, Litmus Test, Understanding, 1 Mark
7 / 11
Which of the following represents a neutralization reaction?
“\(CaCO_3 \rightarrow CaO + CO_2\)::0″;;”\(2Mg + O_2 \rightarrow 2MgO\)::0″;;”\(Zn + H_2SO_4 \rightarrow ZnSO_4 + H_2\)::0”
Neutralization
8 / 11
When phenolphthalein is added to a solution, it turns pink. What does this indicate about the solution?
“The solution is acidic in nature::0″;;”The solution is neutral::0″;;”The solution is saline::0”
Indicator Behavior
Chemistry → Acids, Bases and Salts, Indicators, Understanding, 1 Mark
9 / 11
Which reaction represents neutralization?
HCl + NaOH → NaCl + H₂O::1;;CaCO₃ → CaO + CO₂::0;;Zn + HCl → ZnCl₂ + H₂::0;;2H₂ + O₂ → 2H₂O::0
Neutralization Reaction
Chemistry → Acids, Bases and Salts, Reaction Type, Applying, 1 Mark
10 / 11
A solution shows \(pH = 2\). What can you infer about it?
“It is a weak acid::0″;;”It is a strong base::0″;;”It is neutral::0”
pH Concept
Chemistry → Acids, Bases and Salts, pH Scale, Applying, 1 Mark
11 / 11
When \(CO_2\) gas is passed through lime water, it first turns milky and then clear. What type of reaction occurs when the solution becomes clear again?
“Formation of insoluble calcium carbonate::0″;;”Decomposition of CaCO_3::0″;;”Neutralization::0”
Reaction with Lime Water
Chemistry → Acids, Bases and Salts, Carbonates, HOTS, 1 Mark
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