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Chapters
2: Periodic Classication of Element
▶ 3: Chemical reactions and equations
4: Effects of electric current
5: Heat
6: Refraction of light
7: Lenses
8: Metallugy
9: Carbon compounds
10: Space Missions
![SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC chapter 3 - Chemical reactions and equations - Shaalaa.com](/images/science-and-technology-1-english-10-standard-ssc_6:5f2b1b2038084cf381bfa42c826a928c.jpg "SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC chapter 3 - Chemical reactions and equations")
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Solutions for Chapter 3: Chemical reactions and equations
Below listed, you can find solutions for Chapter 3 of Maharashtra State Board SCERT Maharashtra for Science and Technology 1 [English] 10 Standard SSC.
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Choose the correct option.
Choose the correct option.
Writing a chemical reaction in brief by using chemical formulae is called as _______.
chemical change
chemical symbol
chemical equation
chemical reaction
When the positive charge on an ion increases or the negative charge on them decreases it is called as _______.
reduction
corrosion
oxidation
decomposition
The chemical reaction in which two or more products are formed from a single reactant is called _______ reaction.
decomposition
combination
displacement
double displacement
In the chemical equation the _______ are written on the left-hand side.
products
reactants
element
catalyst
Choose the correct option from the bracket and explain the statement giving a reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ______ reaction.
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Answer in one sentence.
Answer the following question in one sentence.
Write chemical formula for rust.
Complete the given chemical reaction.
\[\ce{CuSO_{4(aq)} + Fe_{(s)} ->}\]______ + ______
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Right or Wrong sentence
If edible oil is left aside for a long time, it will get rancid.
Right
Wrong
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Write an Explanation
Write an Explanation.
Balanced equations
Write an Explanation.
Endothermic reaction
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Write scientific reasons
Write scientific reason.
Always paint grills of doors and windows before using them.
Give scientific reason.
It is reccommended to use air tight container for storing oil for long time.
Give scientific reason.
When the gas formed on heating limestone, is passed through freshly prepared lime water, the lime water turns milky.
Give scientific reason.
It takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly.
Write scientific reason.
Adding zinc particles to a solution of copper sulphate makes the blue solution colorless.
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Solve the following Questions
Explain the factors affecting the rate of chemical reaction with example.
What are reactants? Explain with the help of example.
What are products? Explain with the help of example.
Explain the following reaction with their balanced chemical equation.
Ammonia gas reacts with hydrogen chloride.
Explain the following reaction with their balanced chemical equation.
Hydrogen sulphide reacts with sulphur dioxide.
Classify the following reaction into Exothermic and Endothermic reactions.
Magnesium ribbon when burned in air, it forms magnesium oxide.
Exothermic reaction
Endothermic reaction
Identify the endothermic and exothermic reaction.
HCl + NaOH → NaCl + H2O + heat
Exothermic reaction
Endothermic reaction
Identify the endothermic and exothermic reaction.
\[\ce{2KClO_{3(s)}->[\Delta] 2KCl_{(s)} + 3O2}\]
Exothermic reaction
Endothermic reaction
Identify the endothermic and exothermic reaction.
\[\ce{CaO + H2O -> Ca(OH)2 + Heat}\]
Exothermic reaction
Endothermic reaction
Identify the endothermic and exothermic reaction.
\[\ce{CaCO_{3(s)}->[\Delta] CaO_{(s)} + CO2}\]
Exothermic reaction
Endothermic reaction
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Explain the following reactions with the balanced equations
Explain the following reaction with the balanced equation.
Aluminium reacts with dil hydrochloric acid
Explain the following reaction with the balanced equation.
Reaction of zinc with dil hydrochloric acid
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Answer the Following
Match the columns.
| Reactants | Products | Types of chemical reaction | ||
| 1. | MgH2 | → | Mg + H2 | Endothermic |
| 2. | 2H2S + SO2 | → | 3S + 2H2O | Oxidation |
| 3. | CaO + H2O | → | Ca(OH)2 + heat | Exothermic |
| Redox | ||||
Write three steps of writing chemical equations with example?
Identify from the following reaction the reactants that undergo oxidation and reduction.
2Ag2O → 4 Ag + O2 ↑
Identify from the reaction the reactants that undergo oxidation and reduction.
2Mg + O2 → 2MgO
Identify from the reaction the reactants that undergo oxidation and reduction.
\[\ce{NiO + H2 -> Ni + H2O}\]
Answer the following questions
What is corrosion?
What is electrolysis?
Which changes occur during chemical changes?
What is the reaction called when oxidation and reduction take place simultaneously? Explain with one example.
Explain the reaction given in the figure.
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC 3 Chemical reactions and equations Answer the following questions
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Write names of reactants and products of chemical reaction.
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Make a list of the elements in the chemical equation.
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Write the number of atoms of various elements in the reactants and products.
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Balance the equation with proper coefficient and rewrite the equation.
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Oxidation means losing electrons then what is reduction?
Observe the following figure and write the answer of the question.
- Which process is shown in the figure?
- Explain the chemical reaction shown in the figure.
- Write the reactions on anode and cathode.
Solutions for 3: Chemical reactions and equations
SCERT Maharashtra solutions for Science and Technology 1 [English] 10 Standard SSC chapter 3 - Chemical reactions and equations
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Concepts covered in Science and Technology 1 [English] 10 Standard SSC chapter 3 Chemical reactions and equations are Chemical Reaction, Chemical Equation, Types of Chemical Change or Chemical Reaction, Direct Combination (or Synthesis) Reaction, Decomposition Reactions, Single Displacement Reactions, Double Displacement Reaction, Corrosion of Metals, Rancidity of Food and Its Prevention, Balancing Chemical Equation, Factors Affecting the Rate of a Chemical Reaction, Energy Change in Chemical Reactions, Rate of Chemical Reaction, Oxidation, Reduction and Redox Reactions.
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