EASY
Earn 100

Write the chemical equation for burning of coal.

Important Questions on Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.

MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
Write the equation necessary for the process of photosynthesis. 
EASY
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
Define photosynthesis. Write the overall reaction of photosynthesis.
EASY
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
What are the two basic raw materials for photosynthesis other than light?
EASY
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.

What type of chemical reaction is respiration? 

MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.

What does one mean by exothermic and endothermic reactions? Give examples. 

MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.

A solution of a substance "X" is used for whitewashing.

(a) Name the substance "X"

(b) Write the formula of substance "X"

(c) Write the reaction of substance "X" with water

EASY
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
List two events which occur during photosynthesis.
MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.

From where do plants get each of the raw materials required for photosynthesis?

MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
What happens chemically, when quicklime is added to water? Give the chemical reaction. 
EASY
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
Name the two stages of photosynthesis.
MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
What is the source of oxygen produced during photosynthesis?
MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
Define photosynthesis and write a chemical equation for the process.
MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.

What is photosynthesis? Write any three factors that affect photosynthesis.

MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
Why is respiration called an exothermic reaction?
MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
Define photosynthesis. Discuss any four factors affecting photosynthesis.
EASY
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
Write the definition of exothermic and endothermic reactions. Give an example of both.
HARD
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.

The reaction of water with CaO has been shown in the given diagram. 

Question Image

(a) Write the names of 1 and 2. 

(b) Write the name of the reaction taking place.

(c) Write the balanced equation for the reaction taking place.

MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
What is photosynthesis? What are the events that takes place during this process? Write how does the plant absorb carbon dioxide.
MEDIUM
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.
Define photosynthesis and write the chemical equation of this process.
EASY
Physical Sciences>Matter and Its Interactions>Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.>Chemical Reactions - The total number of each type of atom is conserved, and thus the mass does not change.

Differentiate between the following pairs on the basis of what is indicated in the brackets.

 Leaf and Liver [form in which glucose is stored].