Ch 1 Flashcards
What is the new substance formed during reaction?
Product
A chemical equation having an equal number of atoms on both sides of the equation is called?
Balanced Chemical equation
What are the things that happen during a reaction which changes reactant to product?
Heat, sunlight, pressure
Gas liberation
Catalyst
Precipitate formed
What are the different types of reactions?
Combination
Decomposition
Displacement
Double displacement
What are the types of reactions for energy flow?
Endothermic
Exothermic
What is gas liberation?
When during a reaction, gas comes or is released in product.
CaCO3 —–> CaO + Co2
What is Catalyst?
Any substance that increases or decreases the rate of reaction without itself being consumed.
What is precipitate?
It is an insoluble solid that emerges from a liquid solution.
What is the colour of precipitate?
Chalky white
How do you know if a reaction has taken place?
Change in state
Change in colour
Change in temperature
Evolution of gas
What is combination reaction?
A reaction in which a single product is formed from two or more reactants
Equation of quick lime?
CaO
Equation of calcium hydroxide (slaked lime)?
Ca(OH) 2
What is used for White Washing?
Slaked lime
Chemical equation of marble?
CaCo3
Calcium carbonate formula
CaCO3
Burning of coal is which type of reaction?
Combination
Formula of Limestone
CaCO3
Formula of Quick lime
CaO
Three types of decomposition
Thermal
Electrolytic
Photochemical
Define Double Displacement
Reactions in which there is a mutual exchange of ions between the reactants.
All decomposition reactions are what
Endothermic
Or
Exothermic
Endothermic
All burning reactions are what
Endothermic
Exothermic
Exothermic
Define reduction
The process of removal of oxygen or addition of hydrogen or electron
Define Oxidation
The process of addition of oxygen or removal of hydrogen or electron
Define corrosion
Corrosion is the degradation of a metal due to it’s reaction with it’s environment.
Ways to prevent corrosion
Painting
Greasing
Oiling
Galvanization
Define Rancidity
When the taste and odour of food containing fat and oil changes when exposed to air for a long time
What causes Rancidity
Oxidation of fat and oil in food
How to prevent Rancidity
Additing anti oxidants
Storing in air tight containers
Flushing the bag with Nitrogen Gas
What is magnesium ribbon rubbed with? And why?
It’s rubbed with Sandpaper
And it’s done to remove the oxide because it reacted with oxygen in air.
What does magnesium ribbon burn with?
Dazzling white flame
What is the precipitate formed when lead nitrate reacts with potassium iodide? And what’s the colour?
Lead iodide
Yellow
Full reaction
Pb(NO3) 2 + KI —>PbI2 + KNO3
What is formed when zinc granules react with HCL Or H2SO4?
Salt and hydrogen gas
What will be the reaction between zinc and HCL?
Displacement and Exothermic
Reaction
Zn +HCL—> ZnCl2 + H2
