मराठी

One of the Following is an Exothermic Reaction. this Is: (A) Electrolysis of Water (B) Conversion of Limestone into Quicklime (C) Process of Respiration (D) Process of Photosynthesis - Science

Advertisements
Advertisements

प्रश्न

One of the following is an exothermic reaction. This is:
(a) electrolysis of water
(b) conversion of limestone into quicklime
(c) process of respiration
(d) process of photosynthesis

Advertisements

उत्तर

(c) process of respiration
In the process of respiration, heat energy that maintains our body temperature is released. Therefore, this process is an exothermic reaction.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ २२]

APPEARS IN

लखमीर सिंह Chemistry (Science) [English] Class 10
पाठ 1 Chemical Reactions and Equations
Exercise 1 | Q 44 | पृष्ठ २२

व्हिडिओ ट्यूटोरियलVIEW ALL [4]

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.


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

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


Balance the given equation:

Fe + O2  Fe2O3

 


Balance the gievn equation:

NaOH + H2SO4  Na2SO4 + 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 reactants.


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.


Give one example  of an endothermic reaction.


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 your observation for the following chemical reaction and name the product formed :

When water is added to quick lime?


Write your observation and name the product when An aqueous solution of barium chloride is added to dilute sulphuric acid.


Name the fundamental law that is involved in every equation.


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

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the volume of chlorine gas formed at S.T.P.


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

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of acid required.


Write word equation for the following molecular equation:

CuCo3 → CuO + CO2 [g]

Word equation:

State the characteristics or indications occurring in the above reaction.


In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.

2H2 + O2 → 2H2O


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


Balance the following simple equation:

Fe   +   Cl2  →  FeCl3 


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

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


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×