मराठी
सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Write Balanced Chemical Equations for the Reactions Represented by Word Equations in the Conditions for Chemical Reaction. - Chemistry

Advertisements
Advertisements

प्रश्न

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

टीपा लिहा
Advertisements

उत्तर

  1.  2Na + H2O → 2NaOH + H2
  2. AgNO3 + NaCl → AgCl + NaNO3
  3. 2KClO3  →  2KCl + 3O2
  4.  6CO2 + 6H2O → C6H12O6 + 6O2
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Language of Chemistry - Additional questions

APPEARS IN

सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 5 Language of Chemistry
Additional questions | Q 3

संबंधित प्रश्‍न

How do the following help in bringing about a chemical change?

heat. 


Write the missing reactants and products and balance the equations.

NaOH + ............... `→` NaCI + ...................


Write the missing reactants and products and balance the equations.

................+ HCI `→` NaCI + `"H"_2"O"` + .........................


Give reason.

Acidic soil is treated with quick lime.


What are biocatalysts ?


Fill in the blank

A new substance is always formed in a _______ change.


Balancing a chemical equation is based on


Balance the following equation :

Fe + H2O → Fe3O4 + H2


Complete the statement by filling the gaps using 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)

Electron ______ is complete in each hydrogen in a hydrogen molecule.


Explain by writing a word equation.

Limestone powder disappears on adding to dilute hydrochloric acids.


Define a photochemical reaction.


Explain,giving one example of the following chemical changes:

Reversible reaction


What do you understand by precipitation reaction? Explain with examples.


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

Ammonium dichromate


Give a chemical test to distinguish between the following gases. 

SO2 and Cl2 


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


Give examples of exothermic reactions i.e. heat evolved in each of the following:

(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.


State the following reaction represent oxidation or reduction.

\[\ce{Cl- ->Cl}\]


State the following reaction represent oxidation or reduction.

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


Define the following term:

Chemical change


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×