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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

A Solution of a Substance ‘X’ is Used for White Washing Write the Reaction of the Substance ‘X’ Named in (A) Above with Water. - Chemistry

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प्रश्न

A solution of a substance ‘X’ is used for white washing write the reaction of the substance ‘X’ named in (a) above with water.

एका वाक्यात उत्तर
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उत्तर

\[\ce{\underset{\text{quick lime}}{CaO} + H2O ->\underset{\text{slaked lime}}{Ca(OH)2}}\]

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पाठ 5: Language of Chemistry - Additional questions

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 5 Language of Chemistry
Additional questions | Q 10.2

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.


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


Complete and balance the following chemical equations

Na + H2 O →


TRUE \ FALSE

Electrolytic refining is a method in which a thin coating of a metal is done over another metal.


What are chemical reactions?


Define electrolysis.


Write a short note on the information derived from a balanced chemical equation.


Balance the following equation :

Fe + H2O → Fe3O4 + H2


Explain the following reaction with one suitable example of Displacement reaction.


Complete the statement by filling the gap using an  appropriate term from the terms given in the bracket.

(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)

An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.


Give an example of a reaction where the following are involved

Light


Give an example of a reaction where the following are involved

Electricity


Give reason for the following:

Molybdenum is used in the manufacture of ammonia.


Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.


Give a balanced equation for the conversion of an ammonium salt to a basic gas.


Select the correct answer from the options given below:

State the gaseous product formed, when

An active metal reacts with dilute sulphuric acid.


______ gas causes tears in our eyes while cutting onions.


Write word equations for two chemical reactions with the help of materials given in the box.

Air, copper sulphate, iron, vinegar, iron oxide, carbon dioxide, iron sulphate, copper, lime water, water

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