English

How will you indicate the following effect in a chemical equation? Endothermic reaction

Advertisements
Advertisements

Question

How will you indicate the following effect in a chemical equation?

Endothermic reaction

Short Answer
Advertisements

Solution

An endothermic reaction is indicated by writing “+Heat” or “+Heat energy” or “+Energy” on the side of the reactants of an equation. For example:

\[\ce{6CO2 + 6H2O + Heat -> C6H12O6 + 6O2}\]

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: Chemical Reactions and Equations - Exercise 1 [Page 28]

APPEARS IN

Lakhmir Singh Chemistry Part 2 [English] Class 10
Chapter 1 Chemical Reactions and Equations
Exercise 1 | Q 9. (c) | Page 28

RELATED QUESTIONS

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 .......................

Write any two observations in an activity which may suggest that a chemical reaction has taken place. Give an example in support of your answer.


State one characteristic of the chemical reaction which takes place when dilute sulphuric acid is added to barium chloride solution.


Give one example of an endothermic reaction.


When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.

  1. What do you think substance X is likely to be?
  2. Name the substance which the yellow solid consists of.
  3. Which characteristic of chemical reactions is illustrated by this example?
  4. Write a balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactants and products involved in the chemical equation.

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.

Balance the following chemical equation:

\[\ce{FeSO4 ->[Heat] Fe2O3 + SO2 + SO3}\]


Name the type of chemical reaction shown by the following equation:

2Mg+ O2 →  2MgO


Write your observations and name the product when

Iron nails are added to an aqueous solution of copper sulphate.


Write word equation for the following skeletal equation:

\[\ce{Ca + O2 → CaO}\]


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

 Carbon + Oxygen → Carbon dioxide.


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.


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


Identify the type of reaction taking place of the following case and write the balanced chemical equation of the reaction:
Zinc reacts with silver nitrate to produce zinc nitrate and silver.


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.


Name the following:

Two non-metal which react explosively when brought in close contact.


Explain the term ‘chemical equation’.


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

one product


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

two product


Write a balanced equation for the following word equation:

Nitrogen dioxide + Water + Oxygen → Nitric acid


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×