Advertisements
Advertisements
प्रश्न
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Make a list of the elements in the chemical equation.
Advertisements
उत्तर
Elements in the chemical reaction are: Na, O, H and S.
APPEARS IN
संबंधित प्रश्न
How will you indicate the following effect in a chemical equation?
A solution made in water.
Correct and balance the following equation:
\[\ce{N + H -> NH3}\]
What are the various ways in which a chemical equation can be made more informative? Give examples to illustrate your answer.
Aluminium burns in chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reaction.
State one characteristic of the chemical reaction which takes place when lemon juice is added gradually to the potassium permanganate solution.
What happens when silver nitrate solution is added to sodium chloride solution?
- Write the equation for the reaction which takes place.
- Name the type of reaction involved.
Balance the following chemical equation :
Na20 + H20 → NaOH
Balance the following equation. Also name the product formed.
`"H"_2 +"CI"_2 → "HCI"`
Balance the following equation. Also name the product formed.
CO2 + C → CO
While performing the experiment with raisins to determine the percentage of water absorbed by them, a student made following measurements:
Mass of water in the beaker = 40 g
Mass of raisins before soaking = 5 g
Mass of raisins after soaking for 2 hours = 8 g
Mass of water left in the beaker after the experiment = 35 g
The percentage of water absorbed by raisins is:
In electrolysis of water, why is the volume of gas collected over one electrode double that of gas collected over the other electrode?
Balance the equation stepwise.
NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + H2O(l)
Write the answer to the following.
Explain the similarity in two events, namely adding NaOH to water and adding CaO to water.
State the information conveyed by the following equation:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2 ↑
Balance the following equation:
Fe + H2O → Fe3O4 + H2
Balance the following equation:
\[\ce{S + HNO3 -> H2SO4 + NO2 + H2O}\]
Balance the following equation:
C + H2SO4 → CO2 + H2O + SO2
Name the fundamental law that is involved in every equation.
Write the balanced chemical equation of the following reaction.
copper + nitric acid → copper nitrate + nitric oxide + water
Grills of doors and windows are always painted before they are used.
Write word equation for the following molecular equation:
\[\ce{NH3 [g] + HCl [g] ⇌ NH4Cl [s]}\]
Word equation:
State which characteristic is observed in the above reaction.
Give an-example of a similar above characteristic, seen between two other gaseous reactants.
Write word equation for the following molecular equation:
Na2SO3 + 2HCl [dil.] → 2NaCl + H2O + SO2 [g]
Write word equation for the following molecular equation:
\[\ce{H2 [g] + Cl2 [g] ->[sunlight] 2HCl}\]
Word equation:
State which form of energy is utilised in the above chemical reaction.
A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – lead [IV] oxide.
Name the following:
A catalyst which increases the rate of a chemical reaction.
Give an example of a chemical equation in which two reactants form:
two product
Balance the following simple equation:
FeCl2 + Cl2 → FeCl3
Balance the following simple equation:
Fe2O3 + H2 → Fe + H2O
Balance the following simple equation:
CaO + HCl → CaCl2 + H2O
Give a balanced equation by partial equation method, [steps are given below].
The reaction of excess ammonia with chlorine – Ammonia as a reducing agent
- Ammonia first reacts with chlorine to give hydrogen chloride and nitrogen.
- Hydrogen chloride then further reacts with excess ammonia to give ammonium chloride.
Give a balanced equation by the partial equation method, [steps are given below].
Oxidation of Lead [II] Sulphide by Ozone
- Ozone first decomposes to give molecular oxygen & nascent oxygen.
- Nascent oxygen then oxidises lead [II] sulphide to lead [II] sulphate.
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
3CuO + NH3 → 3Cu + 3H2O + N2
What is called thermolysis reactions?
Which among the following is(are) double displacement reaction(s)?
- `"Pb" + "CuCl"_2 -> "PbCl"_2 + "Cu"`
- `"Na"_2"SO"_4 + "BaCl"_2 -> "BaSO"_4 + 2"NaCl"`
- `"C" + "O"_2 -> "CO"_2`
- `"CH"_4 + 2"O"_2 -> "CO"_2 + 2"H"_2"O"`
Why should a magnesium ribbon be cleaned before burning in air?
