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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 Write the number of atoms of various elements in the reactants and products. - Science and Technology 1

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प्रश्न

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.

एका वाक्यात उत्तर
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उत्तर

  Reactants
(Left side)
Products
(Right side)
Element Number of atoms Number of atoms
Na 1 2
O 5 5
H 3 2
S 1 1
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पाठ 3: Chemical reactions and equations - Answer the following questions

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एससीईआरटी महाराष्ट्र Science and Technology 1 [English] 10 Standard SSC
पाठ 3 Chemical reactions and equations
Answer the following questions | Q 1.3

संबंधित प्रश्‍न

Translate the following statement into chemical equation and then balance it.

Hydrogen sulphide gas burns in the air to give water and sulphur dioxide.


Write the balanced chemical equation for the following reaction.

\[\ce{Aluminium + Copper chloride -> Aluminium chloride + Copper}\]


State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.


Balance the given chemical equation:

C + CO2 → CO


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 metals.


Explain, with example, how the physical states of the reactants and products can be shown in a chemical equation.


Carbon monoxide reacts with hydrogen under certain conditions to form methanol (CH3OH). Write a balanced chemical equation for this reaction indicating the physical states of reactants and product as well as the conditions under which this reaction takes place.


Is Burning of natural gas an endothermic reaction or an exothermic reaction?


An acid which can decolourise purple coloured potassium permanganate solution is:
(a) sulphuric acid
(b) citric acid
(c) carbonic acid
(d) hydrochloric acid


The chemical reaction between quicklime and water is characterised by:
(a) evolution of hydrogen gas
(b) formation of slaked lime precipitate
(c) change in temperature of mixture
(d) change in colour of the product


A colourless lead salt, when heated, produces a yellow residue and brown fumes.
(a) Name the lead salt.
(b) Name the brown fumes.
(c) Write a chemical equation of the reaction involved.


Write the balanced equation for the following chemical reaction.

\[\ce{Barium chloride + Aluminium sulphate -> Barium sulphate + Aluminium chloride}\]


What is a chemical equation?


Write word equation for the following skeletal equation:

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


Balance the following chemical equation :

FeS + HCl →  FeCl2 + H2S


Write your observation and name the product when ron nails are added to an aqueous solution of copper sulphate.


What is a chemical equation? Why it is necessary to balance it?


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

Calcium + Nitrogen → Calcium nitride


Name the fundamental law that is involved in every equation.


Write the balanced chemical equation of the following reaction. iron + sulphuric acid → ferrous sulphate + hydrogen.


Write the balanced chemical equation of the following reaction.

copper + nitric acid → copper nitrate + nitric oxide + water


Write the balanced chemical equation of the following reaction.

barium chloride + sulphuric acid → barium sulphate + hydrochloric acid


Write the balanced chemical equation of the following reaction.

zinc sulphide + oxygen → zinc oxide + sulphur dioxide


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.

sulphur + nitric acid→ sulphuric acid  + nitrogen dioxide + water.


Write word equation for the following molecular equation:

\[\ce{NH3 [g] + HCl [g] ⇌ NH4Cl [s]}\]

Word equation:
State which characteristic is observed in the above reaction.

Give an-example of a similar above characteristic, seen between two other gaseous reactants.


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 – mercury [II] oxide.


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

Light energy


Give word equation for the following chemical reaction and give the names of the product formed.

Zn + 2HC1→ ZnCl2 + H2


Give word equation for the following chemical reaction and give the names of the product formed.

ZnCO3 → ZnO + CO2


Give word equation for the following chemical reaction and give the names of the product formed.

NH3 + HCl→ NH4Cl


Explain the term ‘chemical equation’.


Give an example of a chemical equation in which two reactants form:

two product


Balance the following simple equation:

\[\ce{Ca(OH)2 + HNO3 -> Ca(NO3)2 + H2O}\]


Balance the following simple equation:

K  +   H2O   →   KOH   +   H2 


Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

Na2SO3 + HCl → 2NaCl + H2O + SO2


Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.

PbO2 +4HCl → PbCl2 + H2O + Cl2


Which of the following is not a physical change?


Which of the following is the correct observation of the reaction shown in the above set up?


Complete the following blank in the equation as indicated.

\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]

Grams: 42 g + ______ `→` ______ + ______


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