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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

What are reactants? Explain with the help of example.

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प्रश्न

What are reactants? Explain with the help of example.

लघु उत्तर
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उत्तर

  1. The substances taking part in chemical reaction are called reactants.
  2. E.g. Formation of carbon dioxide gas by combustion of coal in air is a chemical reaction. In this reaction, coal (carbon) and oxygen (from air) are the reactants while carbon dioxide is the product.
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पाठ 3: Chemical reactions and equations - Solve the following Questions [पृष्ठ २७]

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एससीईआरटी महाराष्ट्र Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
पाठ 3 Chemical reactions and equations
Solve the following Questions | Q 2 (i) | पृष्ठ २७

संबंधित प्रश्‍न

Why should a magnesium ribbon be cleaned before it is burnt in the air?


Correct and balance the following equation:

\[\ce{N + H -> NH3}\]


Balance the following equations:

\[\ce{Al(OH)3 -> Al2O3 + H2O}\]


A metal X forms a salt XSO4. The salt XSO4 forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y. Metal X is used in making electric wires and alloys like brass.

  1. What do you think metal X could be?
  2. Write the name, formula and colour of salt XSO4.
  3. What is the blue precipitate Y?
  4. Write a chemical equation of the reaction which takes place when salt XSO4 reacts with sodium hydroxide solution. Give the state symbols of all the reactants and products which occur in the above equation.

A white precipitate can be obtained by adding dilute sulphuric acid to ______.


Balance the following equation :

Pb3O4 → PbO + O2


Balance the following equation. Also name the product formed.

PbCO3    →   PbO +CO2


Balance the equation stepwise.

 SO2(g) + H2S(aq) → S(s) + H2O(l) 


Write the chemical equation for the following word equation and balance them.

Magnesium + Sulphuric acid → Magnesium sulphate + Hydrogen


Balance the following equation:

P + HNO3 → NO2 + H2O + H3PO4


Write the balanced chemical equation of the following reaction.

potassium dichromate + hydrochloric acid → Potassium chloride + chromium chloride + water + chlorine


Choose the correct alternative and rewrite the following sentence.

Which of the following is not required to find the pH of a given solution? 


Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.

Electrical energy


Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.

Catalyst


Write word equation for the following chemical reaction given below. Also state the observation seen in the case.

\[\ce{2SO2 + O2 ⇌[V2O5][450°C] 2SO3}\]


What is meant by ‘reactants’ and ‘products’ in a chemical equation?


Balance the following simple equation:

KHCO3 →  K2CO3   +    H2O   +   CO2


Write a balanced equation for the following word equation:

Nitrogen dioxide + Water + Oxygen → Nitric acid


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

A dilute ferrous sulphate solution is gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?


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