Chemistry

Definitions(Frame Q)

100

This is the process in which atoms are rearranged to produce new substances.

What is a chemical reaction?

200

This is a reaction that releases energy.

What is exothermic?

300

When a single reactant gives to two or more products on heating

What is Thermal Decomposition?

400

This reaction absorbs energy.

What is endothermic?

500

When two or more reactants combine to form Insoluble salt solution by exchanging ions

What is Precipitation reaction?

Chemical Equations

100

This is an expression that uses symbols to show the relationship between the starting substances and the sbustance that are produced during a chemical reaction.

What is chemical equation?

200

This is the substance that participates in the chemical reaction.

What is reactants?

300

This is the substance that is formed in a reaction.

What is products?

400

when you write an Unbalanced equation 

what is Skeletal equation?

500

A gas burns with Pop Sound.

What happens when Hydrogen gas is burnt?

Chemical Reactions

100

What happens when metal reacts with Acid

salt and Hydrogen gas is formed

200

Name reaction where Acid reacts with Base

Neutralization Reaction

300

We get Marble finish on Walls

What happens when Calcium Hydroxide is exposed to atmosphere

400

Give an example of Photolytic reaction with Balanced chemical equation

Silver Chloride when exposed to sunlight 2AgCl---> 2Ag + Cl2 

500

Name reaction where Oxygen is added and Hydrogen is Removed

Oxidation reaction

Observation based

100

How do you determine Chemical reaction took place

Change in Colour, Temperature, State, gas evolved

200

green colour salt changes to reddish brown

what happens when ferrous sulphate is heated?

300

An iron nail gets brown coating

What happens when Iron nail is dipped in Copper Sulphate solution?

400

Formation of Yellow Precipitate

What colour of ppt is formed when Potassium Iodide reacts with Lead nitrate solution?

500

Salt on heating gives crackling noise

What happens when Lead Nitrate is heated?

Balancing Equations

100

__H₂ + __O₂ ---> __H₂O

2H₂ + O₂ ---> 2H₂O

200

__FeSO₄ ---> __ Fe₂O₃ + __ SO₂ +___SO₃

2FeSO₄ ---> Fe₂O₃ + SO₂ +SO₃

300

__Pb(NO3)2 --> ___ PbO + __ NO₂ + __O₂

2Pb(NO3)2 --> 2 PbO + 4NO₂ + O₂

400

__Fe + __ H₂O -->__ Fe₃O₄ + __H₂

3Fe + 4 H₂O --> Fe₃O₄ + 4H₂

500

__Pb(NO3)2 +__ KI --> ___ PbI₂ + __ KNO₃ 

Pb(NO3)2 + 2KI --> PbI₂ + 2KNO₃