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Balance the given chemical reaction as per the instructions below. NaOH+HX2SOX4⟶NaX2SOX4+HX2O Balance the equation with proper coefficient and rewrite the equation. - Science and Technology 1

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प्रश्न

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.

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उत्तर

Coefficient ‘2’ is added to the reactant ‘NaOH’ and the product ‘H2O’ to balance the equation.

The final balanced equation is:

\[\ce{2NaOH + H2SO4 -> Na2SO4 + 2H2O}\]

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अध्याय 3: Chemical reactions and equations - Answer the following questions

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एससीईआरटी महाराष्ट्र Science and Technology 1 [English] 10 Standard SSC
अध्याय 3 Chemical reactions and equations
Answer the following questions | Q 1.4

संबंधित प्रश्न

Balance the given equation:

H2O2  H2O + O2


Balance the gievn equation:

NaOH + H2SO4  Na2SO4 + H2O


Fill in the following blank with suitable word:

A solution made in water is known as an ........... solution and indicated by the symbol ...........

 


When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are elements.


Convey the following information in the form of a balanced chemical equation:
"An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution."


 Write balanced chemical equation with state symbols for the following reaction:
Sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water.


Which of the following does not involve a chemical reaction?


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 wire and alloys like brass.
(a) What do you think metal X could be?
(b) Write the name, formula and colour of salt XSO4.
(c) What is the blue precipitate Y?
(d) 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.


The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
(a) What is metal M?
(b) What is solution S? Is it acidic or alkaline?
(c) What is gas G?
(d) Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
(e) Is this reaction exothermic or endothermic?


The removal of oxygen from a substance is called:
(a) oxidation
(b) corrosion
(c) reduction
(d) rancidity


A white precipitate will be formed if we add common salt solution to:
(a) Ba(NO3)2 solution
(b) KNO3 solution
(c) AgNO3 solution
(d) Mg(NO3)2 solution


Explain the following reaction with one suitable example .
Decomposition reaction


Write your observations and name the product when

Iron nails are added to an aqueous solution of copper sulphate.


What is a chemical equation?


Write word equation for the following skeletal equation:

\[\ce{KNO3 -> KNO2 + O2}\]


Balance the following equation. Also name the product formed. 

`"CO" + "O"_2  → " CO"_2`


What do the following symbol stand for?

2H2 


Balance the following equation:

Zn + KOH → K2ZnO2 + H2


Why should an equation be balanced? Explain with the help of a simple equation.


Write the balanced chemical equation of the following reaction. potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water


Write the balanced chemical equation of the following reaction.

aluminium + sodium hydroxide + water → sodium meta aluminate + hydrogen


Write the balanced chemical equation of the following reaction.

potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.


\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate mass of MnOused.


\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of salt formed.


Answer the following question:
How do acids and bases react with each other? What is the name of the process? What product is obtained from these reactions?


Identify the type of reaction taking place of the following case and write the balanced chemical equation of the reaction:
Zinc reacts with silver nitrate to produce zinc nitrate and silver.


Identify the type of reaction taking place of the following case and write the balanced chemical equation of the reaction:
Potassium iodide reacts with lead nitrate to produce potassium nitrate and lead iodide.


1 g of copper powder was taken in a China dish and heated. What change takes place on heating? When hydrogen gas is passed over this heated substance, a visible change is seen in it. Give the chemical equations of reactions, the name and the color of the products formed in each case.


When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.

Write the balanced chemical equation for this reaction.


Give a balanced equation for addition of iron to copper [II] sulphate solution. State the change in colour seen.


In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.

NH3 + HCl ⇌ NH4Cl 


In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:

Iron [III] chloride to ammonium hydroxide.


Name the following:

Two gases which react under pressure in presence of a catalyst at elevated temperatures to give a gaseous product.


Explain the term ‘chemical equation’.


Balance the following simple equation:

N2   +   O2  ⇌  NO


Balance the following simple equation:

Zn  +   HCl  →   ZnCl2   +   H2 


Balance the following chemical equation.

  1. Na + O2 → Na2O3
  2. Ca + N2 → Ca3N2
  3. N2 + H2 →NH3
  4. CaCO3 +HCl → CaCl2 + CO2 +H2O
  5. Pb(NO3)2 → PbO + NO2 + O2

Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSOand NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is(are) correct?

  1.  In beakers A and B, exothermic process has occurred.
  2. In beakers A and B, endothermic process has occurred.
  3. In beaker C exothermic process has occurred.
  4.  In beaker C endothermic process has occurred.

Dil. HCl is added to Zn granules. How will you prove that chemical change has taken place here? Support your response with two arguments.


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