Advertisements
Advertisements
प्रश्न
Name the type of chemical reaction shown by the following equation:
2Mg + O2 → 2MgO
Advertisements
उत्तर
2Mg + O2 → 2MgO => Combination reaction.
APPEARS IN
संबंधित प्रश्न
The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
Write the missing reactants and products and balance the equations.
NaOH + ............... `→` NaCI + ...................
FILL IN THE BLANK
Negatively charged ions are called ..........
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
How is precipitate formation in a chemical reaction indicated?
Name three reducing agents ?
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Choose the correct option from the bracket and explain the statement giving a reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
Addition of an aqueous solution of ZnSO4 to an aqueous solution of BaCl2 is an example of ______ reaction.
Give an example of the following chemical change.
Two solids combine to form a liquid
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
Name: A greenish-yellow gas.
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Name the following:
The type of change physical or chemical involved – ‘during respiration in human beings’.
What is a chemical reaction?
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
A bag of cement lying in the open gets wet due to rain during the night. The next day the sun shines brightly. Do you think the changes, which have occurred in the cement, could be reversed?
Which of the following is/are true when milk changes into curd?
- Its state is changed from liquid to semi solid.
- It changes colour.
- It changes taste.
- The change cannot be reversed.
Choose the correct option from below:
Is the conversion of milk into ice cream a chemical change?
Chemical changes are important in our day-to-day life. Give examples.
Write a note on the following:
Curdling of milk
