हिंदी

Which among the following change is exothermic or endothermic in nature? Dissolution of sodium hydroxide in water

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प्रश्न

Which among the following change is exothermic or endothermic in nature?

Dissolution of sodium hydroxide in water

एक शब्द/वाक्यांश उत्तर
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उत्तर

Exothermic

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अध्याय 1: Chemical Reactions and Equations - Exemplar [पृष्ठ ५]

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एनसीईआरटी एक्झांप्लर Science Exemplar Class 10
अध्याय 1 Chemical Reactions and Equations
Exemplar | Q 22. (c) | पृष्ठ ५

संबंधित प्रश्न

Balance the following equation:

`N_2+O_2    →    NO`


Balance the following equation. Also name the products formed. 

`Mg + O_2         → MgO`


Balance the following equation. Also name the products formed.

`KCIO_3          →    KCI +O_2`


Balance the following equation. Also name the products formed.

`CO _2 + C    →   CO`


Write a balanced molecular equation for the following word equation:

\[\ce{Lead sulphate + ammonium hydroxide->Ammonium sulphate + lead hydroxide}\]


Write a balanced molecular equation for the following word equation:

\[\ce{Lead nitrate + sodium chloride->Sodium nitrate + lead chloride}\]


Balance the following equation:

\[\ce{Al + O2->Al2O3}\]


Balance the following important equation:

NaOH + H2SO4 → Na2SO4 + H2


Balance the following important equation:

ZnS  + O2  → ZnO + SO2 


Balance the following important equation:

Pb(NO3)2 + HCl → PbCl2 + HNO3 


Balance the following important equation:

Mg3N2 + H2O → Mg(OH)2 + NH3


Balance the following important equation:

AIN + H2O `→` Al(OH)3 + NH3


Balance the following important equation:

Cu + HNO3 (conc.) → Cu(NO3)2 + H2O + NO2 


Balance the following important equation:

C + H2SO4 (conc.) → CO2 + H2O + SO2 


Balance the following important equation:

S + H2SO4 (conc.) → SO2 + H2


A chemical reaction does not involve:


Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form a solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed?

  1.  It is an endothermic reaction
  2.  It is an exothermic reaction
  3. The pH of the resulting solution will be more than seven
  4. The pH of the resulting solution will be less than seven

Complete the missing component/variable given as x and y in the following reactions

`"CaCO"_2(s)overset(x)(->) "CaO"("s") + "CO"_2("g")`


Identify the types of reaction mentioned above. Give one example for type in the form of a balanced chemical equation.


Complete the co-relation:

CuI2 : Brown : : AgCl : ______


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