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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

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

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प्रश्न

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

टिप्पणी लिखिए
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उत्तर

  1.  2Na + H2O → 2NaOH + H2
  2. AgNO3 + NaCl → AgCl + NaNO3
  3. 2KClO3  →  2KCl + 3O2
  4.  6CO2 + 6H2O → C6H12O6 + 6O2
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अध्याय 5: Language of Chemistry - Additional questions

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

संबंधित प्रश्न

MULTIPLE CHOICE QUESTIONS

Tick the most appropriate answer.

Reduction is a chemical reaction in which there is

  1. removal of hydrogen
  2. removal of oxygen
  3. addition of oxygen
  4. none of these

TRUE \ FALSE

Weak electrolytes dissociate partially in their aqueous or fused state.


TRUE \ FALSE

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


A solution of a substance ‘X’ is used for white washing Name the substance ‘X’ and write its formula.


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


Explain by writing a word equation.

Respiration is a chemical change. 


What do you understand by 'chemical reaction'?


Give a chemical test to distinguish between the following gases. 

NH3 and HCl


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

Ammonium dichromate.


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

Zinc carbonate.


Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.


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.


Select the correct answer for the following options:

The pale blue precipitated obtained when copper [II] sulphate reacts with sodium hydroxide.


State the following reaction represent oxidation or reduction.

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


What kind of a change is associated with decaying of a plants?


Chemists identify gypsum as a natural indicator.


State whether the following statement is true or false:

When a candle burns, both physical and chemical changes take place.


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


______ is the chemical name of limestone.


What is thermochemical reactions?


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