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Balance the given chemical reaction as per the instructions below. NaOH+HX2SOX4⟶NaX2SOX4+HX2O Make a list of the elements in the chemical equation. - Science and Technology 1

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प्रश्न

Balance the given chemical reaction as per the instructions below.

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

Make a list of the elements in the chemical equation.

एक पंक्ति में उत्तर
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उत्तर

Elements in the chemical reaction are: Na, O, H and S.

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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 1.2

संबंधित प्रश्न

Write the balanced chemical equation for the following reaction.

\[\ce{Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride}\]


Translate the following statement into chemical equation and then balance the equation:

Phosphorus burns in oxygen to give phosphorus pentoxide.


Correct and balance the following equation:

N    +   H     NH3


Balance the given equation:

Mg(OH)2  + HCI    MgCI + H2O


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 products.


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


When potassium nitrate is heated, it decomposes into potassium nitrite and oxygen. Write a balanced equation for this reaction and add the state symbols of the reactants and products.


When metal X is treated with a dilute acid Y, then a gas Z is evolved which burns readily by making a little explosion.
(a) Name any two metals which can behave like metal X.
(b) Name any two acids which can behave like acid Y.
(c) Name the gas Z.
(d) Is the gas Z lighter than or heavier than air?
(e) Is the reaction between metal X and dilute acid Y, exothermic or endothermic?
(f) 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.


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?


Write the balanced equation for the following chemical reaction.

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


Balance the following chemical equation :

Na20 + H20  →  NaOH


Balance the following equation :

Pb3O4 → PbO + O2


Balance the following equation. Also name the product formed. 

`"NaNO"_3  → "NaNO"_2  + "O"_2`  Name of product (s)


Balance the following equation. Also name the product formed. 

`"KCIO"_3 →  "KCI" +"O"_2`


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


Write down what you understood from the following chemical reaction.

AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)


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

Carbon   + Oxygen → Carbon dioxide


Balance the following equation:

 Fe + H2O → Fe3O4 + H2

 


Balance the following equation:

Fe2O3 + CO → Fe + CO2


Balance the following equation:

Pb3O4 → PbO + O2


Balance the following equation:

MnO2 + HCl → MnCl2 + H2O + Cl2


Balance the following equation:

C + H2SO4 → CO2 + H2O + SO2


Balance the following equation:

NO2 +H2O → HNO2 + HNO3


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.


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

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


Write word equation for the following molecular equation:

FeSO4 + 2NaOH →Na2SO4 + Fe(OH)2 ↓

Word equation:

State why [↓] indication is seen after Fe(OH)2 and not after Na2SO4


Write word equation for the following molecular equation:

\[\ce{H2 [g] + Cl2 [g] ->[sunlight] 2HCl}\]

Word equation:

State which form of energy is utilised in the above chemical reaction.


Write word equation for the following molecular equation:

CaO + H20 → Ca (OH)2 + Δ

Word equation:

State why [+ Δ ] is not written in the reaction, if ZnO reacts with H2O.


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 – zinc carbonate.


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:

Lead nitrate to ammonium hydroxide.?


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

Heat energy


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

NH3 + HCl→ NH4Cl


Balance the following simple equation:

NO   +   O2  →  NO2 


Fill in the blank with the correct word from the options given below:

A chemical equation is a shorthand form for a _______ change.


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

Oxidation of Lead [II] Sulphide by Ozone

  1. Ozone first decomposes to give molecular oxygen & nascent oxygen.
  2. Nascent oxygen then oxidises lead [II] sulphide to lead [II] sulphate. 

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

2H2O + 2Cl2 → 2HCl + O2


The following reaction is an example of a `4"NH"_3("g") + "SO"_2 -> 4"NO"("g") + 6"H"_2"O"("g")`

  1. displacement reaction
  2. combination reaction
  3.  redox reaction
  4. neutralisation reaction

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