What is the oxidation number of carbon in CO₂?
Let C = x. O = -2. Equation: x + 2(-2) = 0, x - 4 = 0, x = +4.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Oxidizing and Reducing Agents and Strength
#carbon dioxide
14 public questions tagged with this topic.
Filter questions
Which group 16 element forms a dioxide that exists as a linear gas at room temperature?
In group 16, O₂ is a linear diatomic gas at room temperature, unlike SO₂ (bent), SeO₂ (polymeric solid), or TeO₂ (solid).
Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Nomenclature of Elements with Atomic Number >100
A mixture of 10 g C and 24 g O₂ is ignited to form CO₂. What is the mass of CO₂ produced? (Atomic masses: C = 12, O = 16
Reaction: C + O₂ → CO₂. Moles: C ≈ 0.8333 mol, O₂ = 0.75 mol. O₂ limits; 0.75 mol CO₂ formed = 0.75 × 44 = 33 g.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Laws of Chemical Combination - Conservation Mass Definite Multiple
How many grams of O₂ are required to produce 44 g of CO₂ by burning carbon, if only 80% of the oxygen reacts? (Atomic ma
Reaction: C + O₂ → CO₂. Moles of CO₂ = 1 mol; requires 1 mol O₂ (32 g). Since 80% reacts, total O₂ = 32 / 0.8 = 40 g.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Importance and Nature of Chemistry and Properties of Matter
What volume of O₂ at STP is required to burn 5 g of C₂H₅OH completely to CO₂ and H₂O? (Molar mass: C₂H₅OH = 46 g/mol)
Reaction: C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O. Moles of C₂H₅OH = 5/46 ≈ 0.1087 mol. 1 mol needs 3 mol O₂; 0.1087 mol needs 0.3261 mol. Volume = 0.3261 × 22.4 ≈ 7.3 L.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Importance and Nature of Chemistry and Properties of Matter
A mixture of 16 g CH₄ and 32 g O₂ is ignited. What is the mass of CO₂ produced? (Atomic masses: C = 12, H = 1, O = 16)
Reaction: CH₄ + 2O₂ → CO₂ + 2H₂O. Moles: CH₄ = 1 mol, O₂ = 1 mol. O₂ is limiting (1 mol). 0.5 mol CH₄ reacts, producing 0.5 mol CO₂ = 22 g.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Dalton's Atomic Theory and Atomic and Molecular Masses
Which metabolic product of yeast is responsible for the rising of dough in bread-making?
Yeast produces carbon dioxide during fermentation, which causes the dough to rise.
Ref: NCERT Class 12 Biology Chapter 8: Microbes in Human Welfare Microbes in Industrial Products - Organic Acids Enzymes Bioactive Molecules
Which organ other than the kidney plays a role in excretion by removing carbon dioxide from the body?
The lungs excrete carbon dioxide, which is a byproduct of cellular respiration.
Ref: NCERT Class 11 Biology Chapter 16: Excretory Products and their Elimination Micturition Disorders and Accessory Excretory Organs
Which of the following statements about carbon dioxide transport is incorrect?
CO₂ transport significantly affects blood pH by forming carbonic acid, which dissociates into bicarbonate and hydrogen ions.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Transport of Carbon Dioxide and Regulation of Respiration
Which of the following statements regarding carbon dioxide transport is incorrect?
Most carbon dioxide is transported as bicarbonate ions, not dissolved in plasma. Therefore, statement 4 is incorrect.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Transport of Carbon Dioxide and Regulation of Respiration
Which step of cellular respiration generates carbon dioxide?
The Krebs cycle releases carbon dioxide as a byproduct of the decarboxylation reactions.
Ref: NCERT Class 11 Biology Chapter 12: Respiration in Plants Krebs Cycle - TCA Cycle - Tricarboxylic Acid Cycle
Which enzyme is responsible for catalyzing the conversion of carbon dioxide and water into carbonic acid?
Carbonic anhydrase catalyzes the conversion of carbon dioxide and water into carbonic acid.
Ref: NCERT Class 11 Biology Chapter 9: Biomolecules Enzymes - Properties Classification and Cofactors