English

Name the gases which Turn moist red litmus blue. - Chemistry

Advertisements
Advertisements

Question

Name the gases which Turn moist red litmus blue.

One Word/Term Answer

Solution

NH3

shaalaa.com
  Is there an error in this question or solution?
Chapter 9: Practical Work - Exercise 9 (A) [Page 142]

APPEARS IN

Selina Concise Chemistry [English] Class 9 ICSE
Chapter 9 Practical Work
Exercise 9 (A) | Q 4.2 | Page 142

RELATED QUESTIONS

TRUE \ FALSE

Ammonia is a good oxidizing agent.


What are biocatalysts ?


Differentiate between in Chemical reaction and chemical equation.


Multiple choice:

A reaction of a type: AB + CD → AD + CD, involves


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

Lead nitrate


Give a chemical test to distinguish between the following gases. 

H2 and CO2


Give a chemical test to distinguish between the following gases. 

SO2 and Cl2 


What do you observe when dilute sulphuric acid is added to the following:

Sodium Sulphide


A chemical reaction is often accompanied by external indications or characteristics which include – 

  1. Colour change
  2. Effervescence or gas evolved
  3. Evolution or absorption of heat
  4. Formation of a precipitate.

With reference to each of the above indications, state the external indication seen during – Addition of dilute hydrochloric acid to silver nitrate.


A chemical reaction is often accompanied by external indications or characteristics which include – 

  1. Colour change
  2. Effervescence or gas evolved
  3. Evolution or absorption of heat
  4. Formation of a precipitate.

With reference to each of the above indications, state the external indication seen during – Thermal decomposition of mercury [II] oxide.


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.


Complete the table given below.

Heat on iodine crystals Colour of vapours evolved  

Explain the term chemical reaction with special reference to reactants and products.


Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.


Silver articles turning black: ______:: Boiling of H2O: physical change ______.


Which of the following statement is incorrect for a chemical reaction?


If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

Can you change rust back into iron by some simple method?


Beating an egg to make a cake is a ______.


Galvanization is a process in which ______ is coated as a layer of iron.


Photosynthesis is a chemical charge. Justify your answer.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×