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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 Make a list of the elements in the chemical equation.

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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.

एका वाक्यात उत्तर
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उत्तर

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

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Chemical reactions and equations - Answer the following questions

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संबंधित प्रश्‍न

Methyl orange is used as an indicator. It shows colour change in acid, base and neutral substance. Tabulate your result as follows:

Indicator Colour change Inference
Methyl Orange No change ......................
.................... Acid
Yellow .......................

Balance the following chemical equation.

\[\ce{BaCl2 + H2SO4 -> BaSO4 + HCl}\]


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

 Hydrogen gas combines with nitrogen to form ammonia


2 mL of sodium hydroxide solution is added to a few pieces of granulated zinc metal taken in a test tube. When the contents are warmed, a gas evolves which is bubbled through a soap solution before testing. Write the equation of the chemical reaction involved and the test to detect the gas. Name the gas which will be evolved when the same metal reacts with dilute solution of a strong acid.


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

Barium chloride reacts with zinc sulphate to give zinc chloride and barium sulphate.


Complete and balance the following equation:

Ca(OH)2 + .......... \[\ce{-> CaCO3 + H2O}\]


Balance the following equation:

\[\ce{Na + O2 -> Na2O}\]


Balance the following equation:

\[\ce{H2O2 -> H2O + O2}\]


What is a chemical equation? Explain with the help of an example.


Aluminium burns in chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reaction.


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.


State one characteristic of the chemical reaction which takes place when wax is burned in the form of a candle.


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.

A colourless lead salt, when heated, produces a yellow residue and brown fumes.

  1. Name the lead salt.
  2. Name the brown fumes.
  3. Write a chemical equation of the reaction involved.

Write word equation for the following skeletal equation:

\[\ce{Ca + O2 → CaO}\]


Write word equation for the following skeletal equation:

\[\ce{Na + O2 ->  Na2O}\]


Balance the following chemical equation :

H2 + O2   →  H2O


Balance the following chemical equation :

Na20 + H20  →  NaOH


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

 Carbon + Oxygen → Carbon dioxide.


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

Calcium oxide + Water → Calcium hydroxide


Balance the following equation. Also name the product formed. 

 `"H"_2 +"CI"_2  →  "HCI"`


Balance the following equation. Also name the product formed. 

`"CO" + "O"_2  → " CO"_2`


A student weighed some raisins and recorded the weight as ‘x’. She then soaked the raisins in distilled water. After about 2 hours she removed the raisins, wiped them dry and weighed them again, and recorded that as ‘y’. The percentage of water absorbed by raisins may be determined using the relationship.


Explain the terms with examples.

Balanced equation


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

Nitrogen + Oxygen → Nitrogen monoxide


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

Sodium reacts with water to form sodium hydroxide and hydrogen


What information do the following chemical equations convey? Mg + 2HCl → MgCl2+ H2


Write the balanced chemical equation of the following reaction.

barium chloride + sulphuric acid → barium sulphate + hydrochloric acid


The chemical reactions in which heat is liberated are called endothermic reactions.


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.


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.?


Name the following:

The gas evolved when a dilute acid is added to chalk [limestone].


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

NaCl + AgNo3 → AgCU ↓ + NaN03


Balance the following simple equation:

Al   +   N2  →  AlN 


Balance the following simple equation:

Al  +   H2O   →   Al2O3   +   H2 


Balance the following simple equation:

\[\ce{N2 + H2 <=> NH3}\]


Balance the following simple equation:

Mg  +  CO2  →  MgO  +  C


With reference to a chemical equation state which of the statements 1 to 5 pertain to A or B.
A: Information provided by a chemical equation. 
B: Limitations of a chemical equation.

  1. The nature of the individual elements.
  2. The speed of the reaction.
  3. The state of matter in which the substance is present.
  4. The completion of the reaction.
  5. The direction of the reaction.

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