Advertisements
Advertisements
प्रश्न
Give reason for the following:
Electrolytic decomposition of water is a reaction involving change of state.
Advertisements
उत्तर
Electrolysis of water is the decomposition of water into hydrogen and oxygen due to the passage of electric current through it.
\[\ce{2H2O(l)->[Electric Current] 2H2 (g) + O2 (g)}\]
APPEARS IN
संबंधित प्रश्न
Define catalyst.
How is precipitate formation in a chemical reaction indicated?
Fill in the blank:
The basic conditions necessary for a chemical reaction is _______
Give an example of a reaction where the following are involved:
Solution
When hydrogen burns in oxygen, water is formed; when electricity is passed through water, hydrogen and oxygen are given out. Name the type of chemical change involved in the two cases.
Explain,giving one example of the following chemical changes:
Reversible reaction
Complete and balance the following reaction:
NaCl(aq) + AgNO3(aq) →
Give a chemical test to distinguish between the following gases.
SO2 and Cl2
Complete the table given below.
| Heat on copper carbonate | Test for gas evolved |
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Explain the term chemical reaction with special reference to reactants and products.
Select the correct answer from the options given below:
State the gaseous product formed, when
An active metal reacts with dilute sulphuric acid.
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
Photosynthesis is a chemical reaction that takes place in the presence of ______.
_____ is the basic material to manufacture urea.
Two chemical species X and Y combine together to form a product P which contains both X and Y
\[\ce{X + Y -> P}\]
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition
How would you show that the settling of curd is a chemical change?
