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Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance. Calcium hydroxide. - Chemistry

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प्रश्न

Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.

Calcium hydroxide.

एक शब्द/वाक्यांश उत्तर

उत्तर

Solid residual product of thermal decomposition of:

Calcium hydroxide \[\ce{\underset{\text{calcium oxide (quick lime)}}{CaO}}\] White
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अध्याय 2: Chemical Changes & Reactions - Chemical Changes & Reactions

APPEARS IN

विराफ जे दलाल Simplified ICSE Chemistry [English] Class 9
अध्याय 2 Chemical Changes & Reactions
Chemical Changes & Reactions | Q 6.5

संबंधित प्रश्न

State whether the following statement is true or false. In case a statement is false, write the corrected statement.

Condensation of steam is not a chemical change.


Changes in which new substances are formed are called ______ changes.


TRUE \ FALSE

Evaporation of water is a physical change. True or false ?


TRUE \ FALSE

The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?


TRUE \ FALSE

Positively charged electrode is called the anode. True or false ?


What are chemical reactions?


Write true or false .
A black residue is formed when sugar is heated .


Write true or false.

A chemical equation gives only qualitative information of a chemical reaction.


Give reason for the following:

Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.


State the main characteristics of chemical reactions. Give at least one example in each case.


Name the following:

The products obtained during ‘photosynthesis’ – which is a chemical change.


Match the chemical reactions in List I with the appropriate answer in List II.

  List I   List II
1. \[\ce{XY⇌[heat]X + Y}\] A: Displacement reaction
2. \[\ce{XY->X + Y}\] B: Double decomposition
3. \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] C: Endothermic reaction
4. \[\ce{X + YZ->XZ + Y}\] D: Thermal dissociation
5. \[\ce{X + Y->[heat]XY -\Delta}\] E: Decomposition reaction

State the following reaction represent oxidation or reduction.

\[\ce{Ag->Ag+}\]


State the following reaction represent oxidation or reduction.

\[\ce{H->H+}\]


Photosynthesis is a chemical reaction that takes place in the presence of ______.


Arrange the following statements in correct sequence:

  1. One side is water-loving and other water-hating molecules.
  2. When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
  3. The dirt surrounded by the detergent molecules floats in the water making it dirty.
  4. Finally, the cloth is clean.
  5. The detergent molecules have two sides.
  6. Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.

Rusting of iron is  ______.


Beating an egg to make a cake is a ______.


When magnesium is burnt in the air, a new substance is formed which is ______.


Write the effects of chemical reactions.


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