| 1 |
Exothermic reaction ae those reactions durng which heat is. |
Given out
Remain same
Absorbed
Used
|
| 2 |
The chemicla reaction during which a compound splits up into two or more simple substanes, is called. |
Additon reaction
Decomposition
Replacement reaction
Balanced reaction
|
| 3 |
During a chemical reaction, total mass of the product is equal to the total mass of reactants, this is a statements of. |
Law of conservation of momentum
Law of conservation of energy
Law of conseration of mass
Law of conseration of acceleration
|
| 4 |
Fire works is an example of ........... reactions. |
Addition
Exothermic
Endothermic
Decomposition
|
| 5 |
Law of conservation of mass put forward in. |
1783
1784
1785
1786
|
| 6 |
Law fo conservation of mass was put forward by |
Newton
Plank's
Lavoisier
Einstein
|
| 7 |
The equation in which the number of atoms of each element on both sides are not equal is called. |
Quadratic equation
Unbalanced equation
Balanced equation
Standard equation
|
| 8 |
Symbol and formulae of the reactants are written on....... side fo arrow. |
Left
Right
Upward
Both side
|
| 9 |
During photosynthesis in plants, carbon dioxide CO2 and water react to produce. |
Water
Energy
Glucoe
CO2
|
| 10 |
When methane is burnt in air, CO2 and.......... are formed. |
O2
H2O
Glucose
Energy
|
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