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Category: Uncategorized

/3

Mathematic Quiz

Math quiz helps us to increase our knowledge

1 / 3

10+20

30

40

50

Multiply

2 / 3

5×40

300

100

200

Wrong answer!

Correct Answer!

On multiplying 4 and 50 we get 200.

3 / 3

150/3

60

50

100

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Created by AMARNATHREDDY M
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Types Of Chemical Reactions | Quiz

Check changes in oxidation states.

1 / 5

Tags: Chemistry → Chemical Reactions, Oxidation-Reduction, Redox Concepts, Applying, 3 Marks

1 points

The reaction (CuO + H_2 rightarrow Cu + H_2O) is an example of:

” Combination Reaction

” Redox Reaction

” Decomposition Reaction

Think of oxidation and reduction together.

Well done! It involves both oxidation and reduction.

Step 1: \(CuO\) is reduced to \(Cu\).
Step 2: \(H_2\) is oxidised to \(H_2O\).
Step 3: Hence, it is a **Redox reaction**.

Observe the exchange of ions.

2 / 5

Tags: 3 Marks, Double Displacement, HOTS, Ion Exchange, Chemistry → Chemical Reactions

1 points

Identify the type of reaction: (AgNO_3 + NaCl rightarrow AgCl + NaNO_3)

” Double Displacement Reaction

” Combination Reaction

” Displacement Reaction

Look for ion exchange between compounds.

Excellent! Ions are exchanged.

Step 1: \(AgNO_3\) reacts with \(NaCl\) to form \(AgCl\) and \(NaNO_3\).
Step 2: Exchange of ions occurs.
Step 3: Hence, it’s a **Double Displacement reaction**.

Check if one element replaces another.

3 / 5

Tags: Chemistry → Chemical Reactions, Displacement, Metal Replacement, Understanding, 2 Marks

1 points

In the reaction (Zn + H_2SO_4 rightarrow ZnSO_4 + H_2), what type of reaction takes place?

” Displacement Reaction

” Double Displacement Reaction

” Combination Reaction

Observe if a metal replaces hydrogen.

Exactly! Zinc replaces hydrogen.

Step 1: Zinc displaces hydrogen from sulphuric acid.
Step 2: This is a **Displacement reaction**.

Check if a single compound breaks down.

4 / 5

Tags: Chemistry → Chemical Reactions, Decomposition, Reaction Breakdown, Applying, 2 Marks

1 points

What type of reaction is represented by (2KClO_3 rightarrow 2KCl + 3O_2)?

” Decomposition Reaction

” Combination Reaction

” Double Displacement Reaction

Notice the number of products formed.

Great! It’s a decomposition reaction.

Step 1: A single reactant \(KClO_3\) decomposes into \(KCl\) and \(O_2\).
Step 2: Hence, it is a **Decomposition reaction**.

Observe how two reactants combine.

5 / 5

Tags: Chemistry → Chemical Reactions, Combination Reaction, Reaction Identification, Understanding, 1 Mark

1 points

Identify the type of reaction: (2H_2 + O_2 rightarrow 2H_2O)

” Displacement Reaction

” Decomposition Reaction

” Combination Reaction

Look again at the product formed.

Correct! Two reactants combine to form a single product.

Step 1: Hydrogen and oxygen combine to form water.
Step 2: Two reactants combine to form one product.
Step 3: Hence, it is a **Combination reaction**.

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Created by AMARNATHREDDY M
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ACIDS, BASES AND SALTS

radio

1 / 11

1 points

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

radio

2 / 11

1 points

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

radio

3 / 11

1 points

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

radio

4 / 11

1 points

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

radio

5 / 11

1 points

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

radio

6 / 11

1 points

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

radio

7 / 11

1 points

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

Chemistry → Acids, Bases and Salts, Neutralization, Understanding, 1 Mark

radio

8 / 11

1 points

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

radio

9 / 11

1 points

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

radio

10 / 11

1 points

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

radio

11 / 11

1 points

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

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February 1, 2023

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