English

Give an example of a chemical reaction for the following situation: Sound is produced

Advertisements
Advertisements

Question

Give an example of a chemical reaction for the following situation:

Sound is produced

One Line Answer
Advertisements

Solution

Burning of crackers produces a loud sound.

shaalaa.com
  Is there an error in this question or solution?
Chapter 6: Physical and Chemical Changes - LONG ANSWER QUESTIONS [Page 37]

APPEARS IN

NCERT Exemplar Science [English] Class 7
Chapter 6 Physical and Chemical Changes
LONG ANSWER QUESTIONS | Q 20. (c) | Page 37

RELATED QUESTIONS

Write a chemical equation to show the process of corrosion of iron.


Fill in the following blank with suitable word:

The corrosion of iron is called ................


Name an alloy of copper. State its chemical composition and any one use.


No chemical reaction takes place when granules of a rusty-brown solid A are mixed with the powder of another solid B. However, when the mixture is heated, a reaction takes place between its components. One of the products C is a metal and settles down in the molten state while the other product D floats over it. It was observed that the reaction is highly exothermic.
(a) What could the solids A and B be?
(b) What are the products C and D most likely to be?
(c) Write the chemical equation for the reaction between A and B leading to the formation of C and D. Mention the physical states of all the reactants and products in this equation and indicate the heat change which takes place.
(d) What is the special name of such a reaction? State one use of such a reaction.
(e) Name any two types of chemical reactions under which the above reaction can be classified.


Identify the process shown in the diagram and explain it in short


Give reason.

An iron article should be given a coat of paint


Observe the following picture and answer the following questions:

  1. What is rust?
  2. Write the chemical formula of rust.
  3. Write the reaction of oxidation of iron at the anode.
  4. Write the reaction of oxidation of iron at the cathode.
  5. What is corrosion?

Rusting of iron : Fe2O3 : : corrosion of copper : ______


Find the odd one out and give its explanation.


Which among the following alloys contain mercury as one of its constituents?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×