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

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

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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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पाठ 3: Chemical reactions and equations - Answer the following questions [पृष्ठ ५०]

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एससीईआरटी महाराष्ट्र Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
पाठ 3 Chemical reactions and equations
Answer the following questions | Q 1 (D) | पृष्ठ ५०

संबंधित प्रश्‍न

Find the odd man out:

Turmeric, Methyl Orange, Rose petals, Beetroot.


On what basis is a chemical equation balanced?


Ammonia reacts with oxygen to form nitrogen and water. Write a balanced chemical equation for this reaction. Add the state symbols for all the reactants and products.


With the help of an appropriate example, justify that some of the chemical reactions are determined by the evolution of a gas.

Give a chemical equation for the reaction involved in the above case.


Which of the following does not involve a chemical reaction?


When metal X is treated with a dilute acid Y, then a gas Z is evolved which burns readily by making a little explosion.

  1. Name any two metals which can behave like metal X.
  2. Name any two acids which can behave like acid Y.
  3. Name the gas Z.
  4. Is the gas Z lighter than or heavier than air?
  5. Is the reaction between metal X and dilute acid Y exothermic or endothermic?
  6. By taking a specific example of metal X and dilute acid Y, write a balanced chemical equation for the reaction which takes place. Also indicate physical states of all the reactants and products.

Explain the following reaction with one suitable example .
Decomposition reaction


Write symbolic representation for the following word equation and balance them :

Iron + Sulphur → Iron sulphide.


Balance the following equation. Also name the product formed.

N2 + H2   →  NH3 


State the information conveyed by the following equation:

Zn(s) + 2HCl(aq) → ZnCl2(aq)  + H2 ↑


Sodium chloride reacts with silver nitrate to produce silver chloride and sodium nitrate

Write the equation.

Check whether it is balanced, if not balance it.

Find the weights of reactants and products.

State the law which this equation satisfies. 


What is thermit process?


A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated –  lead [IV] oxide.


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:

Copper [II] sulphate to sodium hydroxide.


Representation of the results of a chemical change – is a chemical equation.

For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓

Answer the following:

Name the reactants and the products in the above equation.


Give reason for the following:

Silver salts are kept in dark coloured bottles.


Balance the following simple equation:

K  +   H2O   →   KOH   +   H2 


Write a balanced equation for the following word equation:

Calcium hydroxide + Ammonium chloride → Calcium chloride + Water + Ammonia


Give a balanced equation by partial equation method, [steps are given below].

The reaction of excess ammonia with chlorine – Ammonia as a reducing agent

  1. Ammonia first reacts with chlorine to give hydrogen chloride and nitrogen.
  2. Hydrogen chloride then further reacts with excess ammonia to give ammonium chloride.

Writing a chemical reaction in brief by using chemical formulae is called as _______.


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