मराठी

The chemical reaction between quicklime and water is characterised by: (a) evolution of hydrogen gas (b) formation of slaked lime precipitate (c) change in temperature of mixture (d) change in colour of the product - Science

Advertisements
Advertisements

प्रश्न

The chemical reaction between quicklime and water is characterised by:
(a) evolution of hydrogen gas
(b) formation of slaked lime precipitate
(c) change in temperature of mixture
(d) change in colour of the product

Advertisements

उत्तर

(c) change in temperature of mixture
Reaction of quicklime and water is highly exothermic, i.e., it evolves heat energy and changes the temperature of mixture.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ २१]

APPEARS IN

लखमीर सिंह Chemistry (Science) [English] Class 10
पाठ 1 Chemical Reactions and Equations
Exercise 1 | Q 41 | पृष्ठ २१

व्हिडिओ ट्यूटोरियलVIEW ALL [4]

संबंधित प्रश्‍न

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

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


Fill in the following blank with suitable word:

 Chemical equations are balanced to satisfy the law of ............


Balance the following equation and add state symbols:

Zn  +  HCI →  ZnCI2  +  H2

 


 Potassium chlorate (KClO3) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction and indicate the evolution of gas.


Ammonia reacts with oxygen to form nitrogen and water. Write a balanced chemical equation for this reaction. Add the state symbols for all the reactants and products.


A metal X forms a salt XSO4. The salt XSO4 forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y. Metal X is used in making electric wire and alloys like brass.
(a) What do you think metal X could be?
(b) Write the name, formula and colour of salt XSO4.
(c) What is the blue precipitate Y?
(d) Write a chemical equation of the reaction which takes place when salt XSO4 reacts with sodium hydroxide solution. Give the state symbols of all the reactants and products which occur in the above equation.


The removal of oxygen from a substance is called:
(a) oxidation
(b) corrosion
(c) reduction
(d) rancidity


Balance the following chemical equation :

H2 + O2   →  H2O


Balance the following equation :

 Fe + O2 → Fe3 O4


Balance the following equation. Also name the product formed. 

`"KCIO"_3 →  "KCI" +"O"_2`


Balance the following equation. Also name the product formed. 

` "H"_2"O"_2    →  "H" _2 "O" + "O"_2` 


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

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of salt formed.


When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.

Write the balanced chemical equation for this 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.


Name the following:

A catalyst which increases the rate of a chemical reaction.


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

\[\ce{ZnCo3->[\triangle] ZnO + CO2}\]


Balance the following simple equation:

C   +   O2  →  CO


Balance the following simple equation:

Al  +   H2SO4  →   Al2(SO4)3   +   H2 


Balance the following simple equation:

Mg  +  CO2  →  MgO  +  C


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×