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Amino Acid Peptide Bond. We covered all the Amino Acid Peptide Bond in this post for free so that you can practice well for the exam.
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mcq on Amino Acid Peptide Bond for Students
Which statement correctly describes the reaction ZnO + CO → Zn + CO₂?
(a) ZnO undergoes oxidation
(b) CO is reduced
(c) CO₂ gets oxidised
(d) ZnO undergoes reduction
Option d – ZnO undergoes reduction
What are some typical signs that a chemical reaction has taken place?
(a) A change in state, colour, or temperature
(b) Release of a gas
(c) Formation of a Solid precipitate
(d) All of the above
Option d – All of the above
What is the correct product of the reaction Mg(s) + H₂SO₄ (aq) → ?
(a) MgSO₃ + H₂O
(b) MgSO + H₂O + O₂
(c) MgSO₄ + H₂
(d) No reaction occurs
Option c – MgSO₄ + H₂
In the reaction 2Pb(NO₃)₂ → 2PbO + nA + O₂, what does nA represent?
(a) 4NO₂
(b) 2NO₂
(c) 2PbNO₂
(d) NO₂
Option a – 4NO₂
When zinc is placed in CuSO₄ solution and it becomes colourless, what kind of reaction is this?
(a) Substitution reaction
(b) Decomposition reaction
(c) Addition reaction
(d) Dissociation reaction
Option a – Substitution reaction
Which of the following represents a chemical change?
(a) Cutting hair
(b) Hair turning grey naturally
(c) Resin absorbing water and swelling
(d) Slicing a fruit
Option b – Hair turning grey naturally
Why is magnesium ribbon cleaned before burning?
(a) It is covered with basic magnesium carbonate
(b) It has a coating of basic magnesium oxide
(c) It contains basic magnesium sulphide
(d) It is coated with basic magnesium chloride
Option a – It is covered with basic magnesium carbonate
Consider the reaction 3Fe (s) + 4H₂O(g) → Fe₃O₄ (s) + 4H₂ (g). Which statements are accurate? (i) Iron is oxidised (ii) Water undergoes reduction (iii) Water acts as a reducing agent (iv) Water serves as an oxidising agent
(a) (i), (ii), and (iii)
(b) (ii) and (iv)
(c) (i), (ii), and (iv)
(d) (ii) and (iv)
Option c – (i), (ii), and (iv)
When ferrous sulphate solution is slowly added to acidified potassium permanganate, the purple colour fades. Why?
(a) KMnO₄ acts as an oxidiser and reacts with FeSO₄
(b) FeSO₄ works as an oxidising agent on KMnO₄
(c) The colour fades simply due to dilution, with no chemical change
(d) KMnO₄ decomposes into a colourless substance due to FeSO₄
Option a – KMnO₄ acts as an oxidiser and reacts with FeSO₄
In which case does hydrogen peroxide act as a reducing agent?
(a) 2KI + H₂O₂ → 2KOH + I₂
(b) 2FeSO₄ + H₂SO₄ + H₂O₂ → Fe₂(SO₄)₃ + 2H₂O
(c) PbS + 4H₂O₂ → PbSO₄ + 4H₂O
(d) Ag₂O + H₂O₂ → 2Ag + H₂O + O₂
Option d – Ag₂O + H₂O₂ → 2Ag + H₂O + O₂
The reaction 4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g) is classified as:
(a) Displacement and neutralisation
(b) Combination and neutralisation
(c) Displacement and redox
(d) Redox and neutralisation
Option c – Displacement and redox
What is involved in a reduction process?
(a) Addition of oxygen
(b) Addition of hydrogen
(c) Removal of oxygen
(d) Removal of hydrogen
Option b – Addition of hydrogen
In an experiment, NaOH, anhydrous CuSO₄, and NaCl are added to beakers A, B, and C respectively. Temperature rises in A and B, while it drops in C. Which conclusions are correct? (i) Beakers A and B show an exothermic reaction (ii) Beakers A and B show an endothermic reaction (iii) Beaker C exhibits an exothermic process (iv) Beaker C shows an endothermic reaction
(a) (i) only
(b) (ii) only
(c) (i) and (iv)
(d) (iv), (ii), and (iii)
Option c – (i) and (iv)
What is the volume ratio of hydrogen to oxygen in water?
(a) 1:2
(b) 1:1
(c) 2:1
(d) 1:8
Option a – 1:2
Which statements are true about silver chloride turning grey in sunlight? (i) It breaks down to form silver (ii) It sublimes in sunlight (iii) Chlorine gas is released during decomposition (iv) It oxidises over time
(a) (i) only
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (iv) only
Option a – (i) only
In the reaction MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂, which substance is oxidised?
(a) MnCl₂
(b) HCl
(c) H₂O
(d) MnO₂
Option d – MnO₂
A substance ‘X’ used in white-washing is produced by heating limestone without air. What is ‘X’?
(a) CaOCl₂
(b) Ca(OH)₂
(c) CaO
(d) CaCO₃
Option a – CaOCl₂
What forms the black coating on silver when exposed to air?
(a) AgNO₃
(b) Ag₂S
(c) Ag₂O
(d) Ag₂CO₃
Option b – Ag₂S
Which of these processes release Heat (exothermic)? (i) Water reacting with quicklime (ii) Dilution of Acid (iii) Water evaporating (iv) Camphor sublimation
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)
Option a – (i) and (ii)
What is oxidation defined as?
(a) Adding oxygen
(b) Adding hydrogen
(c) Removing oxygen
(d) Removing hydrogen
Option a – Adding oxygen
If potassium iodide reacts with lead nitrate to form a yellow precipitate, which compound can substitute for lead nitrate?
(a) Lead sulphate (not soluble)
(b) Lead acetate
(c) Ammonium nitrate
(d) Potassium sulphate
Option b – Lead acetate
What kind of reaction happens when Electricity is used to break down water?
(a) Displacement
(b) Combination
(c) Decomposition
(d) Double displacement
Option c – Decomposition
In the reaction H₂S + I₂ → 2HI + S, which substance is the oxidising agent?
(a) I₂
(b) H₂S
(c) HI
(d) S
Option a – I₂
Which of the following is an example of an endothermic process?
(a) Acid dilution with water
(b) Dry ice sublimation
(c) Water vapour condensation
(d) Cellular Respiration in humans
Option b – Dry ice sublimation
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