मराठी

Write the Chemical Reaction Where the Following Changes Are Observed. Colour Change is Noticed - Chemistry

Advertisements
Advertisements

प्रश्न

Write the chemical reaction where the following changes are observed.

Colour change is noticed

एका वाक्यात उत्तर

उत्तर

\[\ce{Fe + \underset{\text{Blue solution}}{CuSO4_(_a_q_)} ->\underset{\text{Green solution}}{FeSO4 + Cu}}\]    

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Chemical Changes and Reactions - Exercise 2 (A) [पृष्ठ २४]

APPEARS IN

सेलिना Concise Chemistry [English] Class 9 ICSE
पाठ 2 Chemical Changes and Reactions
Exercise 2 (A) | Q 6.2 | पृष्ठ २४

संबंधित प्रश्‍न

TRUE \ FALSE

Weak electrolytes dissociate partially in their aqueous or fused state.


Define electrolysis.


Define chemical reaction.


State four conditions necessary for chemical reactions to take place.


Give an example of a reaction where the following are involved:

Close contact


Write the chemical reaction where the following changes are observed.

Physical state is changed


What do you observe? When

Water is added to the quick lime.


State the original colour of the following substance and colour of residue obtained after heating.

Lead nitrate


Distinguish by heating the following in dry test tubs.

Zinc nitrate and copper nitrate.


Give examples of exothermic reactions i.e. heat evolved in each of the following:

(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.


Complete the table given below.

Addition of dil. H2SO4 to FeS  Odour of gas evolved  

Complete the table given below.

Addition of dil. H2SO4 to zinc  Test for gas evolved  

A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?


What is the use of indicator?


Melting of wax is a change where a solid changes to a liquid state. Give one more such change which you observe in your surroundings


Write the equation for the process of formation of rust.


Write a note on the following:

Curdling of milk


Assertion (A): Cutting paper into very small pieces is an irreversible change.
Reason (R): Physical changes are always reversible.


Define the following term:

Chemical change


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×