If you’re looking for a way to enhance your Class 10 Science Chemistry, then look no further than the NCERT MCQ Questions for Class 10 Science Chapter 1 Chemical Reactions and Equations with Answers. MCQ Questions for Class 10 Science with Answers is perfect for those who are in Class 10 Science and want to get ahead of everyone else by mastering the subject skills as soon as possible!
Chemical Reactions and Equations Class 10 MCQs Questions with Answers
Solving Chemical Reactions and Equations Multiple Choice Questions of Class 10 Science Chapter 1 can be of great help to students as they will be aware of all the concepts. These MCQ questions on chemical reactions and equations in Class 10 Science with answers pave for a quick revision, thereby helping you learn more about this subject.
Question 1.
What happens when dilute hydrochloric acid is added to iron filling? Tick the correct answer
(a) Hydrogen gas and iron chloride are produced.
(b) Chlorine gas and iron hydroxide are produced
(c) No reaction takes place
(d) Iron salt and water are produced
Answer
(a) Hydrogen gas and iron chloride are produced.
Question 2.
Assertion: A lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas.
Reason: Lead nitrate reacts with potassium iodide to form yellow ppt of lead iodide and the reaction is double displacement as well as precipitation reaction.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
Answer
(b) Both A and R are true but R is not the correct explanation of A.
Question 3.
The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of
(a) Decomposition Reaction
(b) Displacement Reaction
(c) Double Displacement Reaction
(d) Neutralisation Reaction
Answer
(c) Double Displacement Reaction
Question 4.
The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called:
(a) Antioxidation
(b) Reduction
(c) Rancidity
(d) Corrosion
Answer
(c) Rancidity
Question 5.
The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of
(a) Decomposition Reaction
(b) Displacement Reaction
(c) Double Displacement Reaction
(d) Neutralisation Reaction
Answer
(c) Double Displacement Reaction
Question 6.
Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is:
(a) 1:1
(b) 2:1
(c) 4:1
(d) 1:2
Answer
(b) 2:1
Question 7.
What type of chemical reactions take place when electricity is passed through water?
(a) Displacement
(b) Combination
(c) Decomposition
(d) Double displacement
Answer
(c) Decomposition
Question 8.
Which of the following is an endothermic process?
(a) Dilution of sulphuric acid
(b) Sublimation of dry ice
(c) Condensation of water vapours
(d) Respiration in human beings
Answer
(b) Sublimation of dry ice
Question 9.
Oxidation is a process which involves
(a) addition of oxygen
(b) addition of hydrogen
(c) removal of oxygen
(d) removal of hydrogen
Answer
(a) addition of oxygen
Question 10.
Give the ratio in which hydrogen and oxygen are present in water by volume.
(a) 1:2
(b) 1:1
(c) 2:1
(d) 1:8
Answer
(a) 1:2
Question 11.
A substance which oxidizes itself and reduces other is known as
(a) Oxidising agent
(b) reducing agent
(c) Both (a) and (b)
(d) None of these.
Answer
(b) reducing agent
Question 12.
In an electrolytic cell where electrolysis is carried, anode has:
(a) Positive change
(b) Negative charge
(c) Connected to negative terminal of the battery
(d) None of these is correct
Answer
(a) Positive change
Question 13.
Which of the following reactions is not correct:
(a) Zn+ CuSO4 → ZnSO4 + Cu
(b) 2Ag + Cu(NO3)2 → 2AgNO3 + Cu
(c) Fe+CuSO4 → FeSO4 + Cu
(d) Mg + 2HCl → MgCl2 + H2
Answer
(b) 2Ag + Cu(NO3)2 → 2AgNO3 + Cu
Question 14.
Copper displaces which of the following metals from its salt solution:
(a) ZnSO4
(b) FeSO4
(c) AgNO3
(d) NiSO4
Answer
(c) AgNO3
Question 15.
Which of the following involves combination of two elements?
(a) N2(g) + 3H2(g) + 2NH3(g)
(b) Cao(s) + CO2(g) → CaCO3(g)
(c) 2SO2(g) + O2(g) → 2SO3f(g)
(d) NH3(g) + HCl(g) – NH4CI(S)
Answer
(a) N2(g) + 3H2(g) + 2NH3(g)
Question 16.
Some crystals of copper sulphate were dissolved in water. The colour of the solution obtained would be:
(a) green
(b) red
(c) blue
(d) brown
Answer
(c) blue
Question 17.
When dilute HCl is added to zinc pieces taken in a test tube
(a) No change takes place
(b) the colour of the solution becomes yellow.
(c) A pungent smelling gas gets liberated.
(d) small bubbles of H2 gas appear on the surface of zinc pieces
Answer
(d) small bubbles of H2 gas appear on the surface of zinc pieces.
Question 18.
Magnesium ribbon is rubbed before burning because it has a coating of:
(a) basic magnesium oxide
(b) basic magnesium carbonate
(c) basic magnesium sulphide
(d) basic magnesium chloride
Answer
(b) basic magnesium carbonate
Question 19.
Which one of the following processes involve chemical reactions?
(a) Storing of oxygen gas under pressure in a gas cylinder
(b) Liquefaction of air
(c) Keeping petrol in a china dish in the open
(d) Heating copper wire in presence of air at high temperature
Answer
(d) Heating copper wire in presence of air at high temperature
Question 20.
Assertion: Zinc reacts with sulphuric acid to form zinc sulphate and hydrogen gas and it is displacement reaction.
Reason: Zinc reacts with oxygen to form zinc oxide.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
Answer
(b) Both A and R are true but R is not the correct explanation of A.
Question 21.
Assertion: MnO2 + 4HCl → MnCl2 + Cl2 + 2H2O is redox reaction.Reason: MnO2 oxides HCl to Cl2 and gets reduced to MnCl.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
Answer
(a) Both A and R are true and R is the correct explanation of A.
Question 22.
Assertion: Magnesium ribbon keeps on burning in atmosphere of nitrogen.
Reason: Magnesium reacts with nitrogen to form magnesium nitrides and this reaction is combination reaction.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
(e) Both A and R are false.
Answer
(a) Both A and R are true and R is the correct explanation of A.
Question 23.
Heat is evolved during:
(a) Endothermic Reaction
(b) Displacement Reaction
(c) Combustion Reaction
(d) Combination Reaction
Answer
(c) Combustion Reaction
Question 24.
Dissolving suger is an example of
(a) Physical change
(b) Chemical change
(c) Redox Reaction
(d) None of these.
Answer
(a) Physical change
Question 25.
A substance added to food containing fats and oils is called:
(a) Oxidant
(b) Rancid
(c) Coolant
(d) Antioxidant
Answer
(d) Antioxidant
Question 26.
Select the oxidising agent for the following reaction:
H2S + I2 > 2HI + S
(a) I2
(b) H2S
(C) HI
(d) S
Answer
(a) I2
Question 27.
A substance ‘X’ is used in white-washing and is obtained by heating limestone in the absence of air. Identify ‘X’.
(a) CaOCl2
(b) Ca (OH)2
(c) CaO
(d) CaCO3
Answer
(b) Ca (OH)2
Question 28.
The process of reduction involves
(a) addition of oxygen
(b) addition of hydrogen
(c) removal of oxygen
(d) removal of hydrogen
Answer
(b) addition of hydrogen
Question 29.
Which of the following gases can be used for storage
(a) Carbon dioxide or Oxygen
(b) Nitrogen or Oxygen
(c) Carbon dioxide or Helium
(d) Helium or Nitrogen
Answer
(d) Helium or Nitrogen
Question 30.
Pb + CuCl2 → PbCl2 + Cu
This reaction is an example of:
(a) combination
(b) displacement
(c) decomposition
(d) double displacement
Answer
(b) displacement
Question 31.
When green coloured ferrous sulphate crystals are heated, the colour of the crystal changes because:
(a) it is decomposed to ferric oxide
(b) it loses water of crystallisation
(c) it forms SO2
(d) it forms SO3
Answer
(b) it loses water of crystallisation
Question 32.
What is observed when a solution of potassium iodide is added to silver nitrate solution?
(a) No reaction takes place
(b) White precipitate of silver iodide is formed
(c) yellow precipitate of Agl is formed
(d) Agl is soluble in water.
Answer
(c) yellow precipitate of Agl is formed
Question 33.
PbS reacts with ozone (O3) and forms pbso4. As per the balanced equation, molecules of ozone required for every one molecule of PbS is/are
(a) 4
(b) 3
(c) 2
(d) 1
Answer
(a) 4
Question 34.
Chemically rust is
(a) Hydrated ferrous oxide
(b) hydrated ferric oxide
(c) only ferric oxide
(d) none of these
Answer
(b) hydrated ferric oxide
Question 35.
Which of the following reactions will not take place?
(a) Zn + CuSO4 → ZnSO3 + Cu
(b) 2KBr + Cl2 →KCI+ Br2
(c) Zn + MgSO4 → ZnSO4 + Mg
(d) Mg + FeSO4 – MgSO4 + Fe
Answer
(c) Zn + MgSO4 → ZnSO4 + Mg
Question 36.
Which of the following is a thermal decomposition reaction?
(a) 2H2O → 2H2 + O2
(b) 2AgCl → 2Ag + Cl2
(c) H2(g) + Cl2(g) → 2HCl(g)
(d) ZnCO3 → ZnO + CO2
Answer
(d) ZnCO3 → ZnO + CO2
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And without any delay jump to the next chapters of Class 10 Science Chemistry MCQs:
Chemistry MCQs Questions for Class 10 with Answers
MCQ Questions for Class 10 Science Chemistry with Answers PDF Download Chapter Wise
- Chapter 1 Chemical Reactions and Equations Class 10 Science Chemistry MCQ
- Chapter 2 Acids, Bases and Salts Class 10 Science Chemistry MCQ
- Chapter 3 Metals and Non-metals Class 10 Science Chemistry MCQ
- Chapter 4 Carbon and Its Compounds Class 10 Science Chemistry MCQ
- Chapter 5 Periodic Classification of Elements Class 10 Science Chemistry MCQ