मराठी

What Are the Various Ways in Which a Chemical Equation Can Be Made More Informative? Give Examples to Illustrate Your Answer. - Science

Advertisements
Advertisements

प्रश्न

What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer.

Advertisements

उत्तर

A chemical equation can be made more informative by:

  • Indicating physical states of reactants and products.
  • Indicating heat change in the reaction.
  • Indicating the reaction condition.

Example:

where,
(s) and (g) signifies solid and gaseous state of compounds, respectively.
Heat written on reactants' side signifies that the reaction consumes heat.
MnO2 written above right-handed arrow signifies reaction takes place in the presence of MnO2.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ १९]

APPEARS IN

लखमीर सिंह Chemistry (Science) [English] Class 10
पाठ 1 Chemical Reactions and Equations
Exercise 1 | Q 20.1 | पृष्ठ १९

व्हिडिओ ट्यूटोरियलVIEW ALL [4]

संबंधित प्रश्‍न

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

Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.


Giving examples, state the difference between balanced and unbalanced chemical equations.


 Rewrite the following information in the form of a balanced chemical equation:
Magnesium burns in carbon dioxide to form magnesium oxide and carbon.


Which of the following does not involve a chemical reaction?


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


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.


Balance the following equation:

MnO2 + HCl → MnCl2 + H2O + Cl2


Balance the following simple equation:

N2   +   O2  ⇌  NO


Balance the following simple equation:

H2   +   Cl2  →  HCl


Balance the following simple equation:

Al  +   H2O   →   Al2O3   +   H2 


Balance the following simple equation:

Mg  +  CO2  →  MgO  +  C


CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]

State the information provided by the above chemical equation.


CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]

State the information not conveyed by the above chemical equation. 


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

2H2O + 2Cl2 → 2HCl + O2


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


Complete the given chemical reaction.

\[\ce{CuSO_{4(aq)} + Fe_{(s)} ->}\]______ + ______


What are products? Explain with the help of example.


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

Which of the following are exothermic processes?

  1. Reaction of water with quick lime
  2. Dilution of an acid
  3. Evaporation of water
  4.  Sublimation of camphor (crystals)

Why should a magnesium ribbon be cleaned before burning in air?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×