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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Select the Correct Answer for the Following Options: the Basic Gas Obtained When Two Gases React in Presence of a Catalyst and the Reaction is Exothermic. - Chemistry

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प्रश्न

Select the correct answer for the following options:

The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.

पर्याय

  • Hydrogen 

  • Copper [II] oxide 

  • Oxygen 

  • Copper [II] hydroxide 

  • Ammonia

MCQ

उत्तर

Hydrogen

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पाठ 5: Language of Chemistry - Objective Type Questions

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विराफ जे. दलाल New Simplified Middle School Chemistry [English] Class 7
पाठ 5 Language of Chemistry
Objective Type Questions | Q 1.2

संबंधित प्रश्‍न

When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.


Name three biochemical catalysts found in the human body.


FILL IN THE BLANK

In a double decomposition precipitation reaction both the reactants must be ............ soluble.


TRUE \ FALSE

Temperature at which a liquid starts boiling is known as the boiling point of that liquid. True or false ?


Is kerosene an electrolyte or a non-electrolyte ?


State four conditions necessary for chemical reactions to take place.


Fill in the blank:
The substances which undergo chemical change are called _______


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Write balanced chemical equations for the reactions represented by word equations in the conditions for chemical reaction.


Name the type of chemical reaction shown by the following equation:

NaOH + HCl → NaCl + H2O


Name the type of chemical reaction shown by the following equation :

Fe2O3 + 2Al → Al2O3 + 2Fe


Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.

Sodium chloride


Give an example of a reaction where the following are involved:

Close contact


What is a chemical change? Give two examples of chemical change?


State the original colour of the following substance and colour of residue obtained after heating.

Ammonium dichromate


State the original colour of the following substance and colour of residue obtained after heating.

Lead nitrate


Give a chemical test to distinguish between the following gases. 

H2 and O2


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

Copper nitrate. 


Complete the table given below.

Heat on ammonium dichromate Name of neutral gas evolved  

Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.


Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].


What is the role of a catalyst in a chemical reaction?


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


Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.


The changes in which new substance with new chemical properties are formed are ______.


______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.


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


Write a note on the catalyst.


Acid rain is a result of ______.


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