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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Give a Word Equation for the Following Reaction. Two Solids Which Combine on Heating, to Give a Liquid.

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प्रश्न

Give a word equation for the following reaction.

Two solids which combine on heating, to give a liquid.

एका वाक्यात उत्तर
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उत्तर

Carbon + Sulphur → Carbon disulphide

C + S → CS(l)

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पाठ 5: Language of Chemistry - Objective Type Questions

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विराफ जे. दलाल Simplified Middle School Chemistry [English] Class 7 ICSE
पाठ 5 Language of Chemistry
Objective Type Questions | Q 2.1

संबंधित प्रश्‍न

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.


Complete and balance the following chemical equations

NaCI + `AgNO_3`  `→`


Give reason.

Acidic soil is treated with quick lime.


TRUE \ FALSE

Copper can displace iron from iron sulphate.


Differentiate between in Chemical reaction and chemical equation.


Give an example of a reaction where the following are involved

Pressure


Give reason for the following:

Colourless concentrated sulphuric acid in a test tube changes to blue on adding a small piece of copper to it.


What do you observe? When

Water is added to the quick lime.


Give an example of the following chemical changes.

A reaction involving

     (i) Change of state

     (ii) formation of precipitate


What do you observe when Cl2 is passed through potassium iodide (KI) solution.


Write your observation and a balanced equation in the case of the following substances being heated.

Ammonium dichromate.


Select the correct answer for the following options:

The gas obtained when potassium chlorate is heated in the presence of a catalyst.


Give a word equation for the following reaction.

A compound which on heating shows – colour change from brown to yellow.


On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.

A coloured substance which leaves a black residue and evolves two gases one of which is acidic and coloured and the other neutral and colourless.


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

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

Lead nitrate.


Circle the odd one out. Give reason for your choice


Limestone contains ______ mainly.


Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.


How would you show that the settling of curd is a chemical change?


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