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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Name the Type of Chemical Reaction Shown by the Following Equation: Naoh + Hcl → Nacl + H2o - Chemistry

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प्रश्न

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

NaOH + HCl → NaCl + H2O

एका वाक्यात उत्तर

उत्तर

NaOH + HCl → NaCl + H2O  => Double decomposition reaction .

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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 8.4

संबंधित प्रश्‍न

The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A), then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.


Complete and balance the following chemical equations:

N2 + O2  →


Complete and balance the following chemical equations

NaCI + `AgNO_3`  `→`


Complete and balance the following chemical equations:

Fe `"SO"_4`  + NaOH  `→`

   (aq.)          (aq.)


Classify the following reaction as combination, decomposition, displacement, precipitation and neutralization. Also balance the equation.

\[\ce{NH3_{(g)} + HCl_{(g)} -> NH4Cl_{(s)}}\]


Fill in the blank:

During a chemical reaction transfer of ________ takes place.


Balance the following equation :

Fe + H2O → Fe3O4 + H2


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

Fe2O3 + 2Al → Al2O3 + 2Fe


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)

A colourless solution of calcium hydroxide in a test tube turns ______ on blowing in it through a blow tube for some time.


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

Water


What is a chemical reaction?


Multiple choice:

Which of the following is not a characteristic of a chemical change?


Give an example of the following chemical changes.

A reaction involving

     (i) Change of state

     (ii) formation of precipitate


Give an example of the following chemical changes.

A reaction where colour change is noticed.


Define:
Electrochemical reaction
Give one example


Select the correct answer for the following options:

The gas which reacts with oxygen to give a neutral liquid.


Give a word equation for the following reaction.

A salt which reacts with ammonium hydroxide to give a reddish brown precipitate.


Give reason for the following:

Even though rusting is an exothermic reaction, the heat evolved when an iron nail rusts is unnoticeable.


Complete the table given below.

Heat on  copper carbonate Test for gas evolved  

State the following reaction represent oxidation or reduction.

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


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].


________ is a chemical substance which alters the speed of a chemical reaction.


Water boiling into water vapour is an example of chemical change.


Classify each of the following, as a physical or a chemical change. Give reasons.

(a) Drying of a shirt in the sun.

(b) Rising of hot air over a radiator.

(c) Burning of kerosene in a lantern.

(d) Change the colour of black tea by adding lemon juice to it.

(e) Churning of milk cream to get butter.


Give an example of a chemical reaction for each of the following situations:

A change in colour is observed.


When magnesium is burnt in the air, a new substance is formed which is ______.


Write a note on the following:

Fermentation


Photosynthesis is a chemical charge. Justify your answer.


When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.


Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.


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