Advertisements
Advertisements
Question
Write the chemical reaction where the following changes are observed.
Colour change is noticed
Solution
\[\ce{Fe + \underset{\text{Blue solution}}{CuSO4_(_a_q_)} ->\underset{\text{Green solution}}{FeSO4 + Cu}}\]
APPEARS IN
RELATED QUESTIONS
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron and rust are the same substances.
Fill in the blanK
A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
Fill in the blank
A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.
Define precipitation.
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
How is a strong electrolyte different from a weak electrolyte?
What do you observe when :
an iron nail is kept in tap water for few days
Write true or false.
A chemical equation gives only qualitative information of a chemical reaction.
Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.
State what you would observe when the following substance is heated in a glass test tube red lead.
Explain the following reaction with one suitable example of Combination reactions .
Define Photochemical reaction
Give an example
What do you understand by precipitation reaction? Explain with examples.
Name: Two nitrates that do not produce nitrogen dioxide on heating.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper nitrate.
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
Arrange the following statements in correct sequence:
- One side is water-loving and other water-hating molecules.
- When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
- The dirt surrounded by the detergent molecules floats in the water making it dirty.
- Finally, the cloth is clean.
- The detergent molecules have two sides.
- Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.