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प्रश्न
Considering the relationship in the first pair, complete the second paie :
AgCI : White :: CuI2 : ___________
उत्तर
AgCI : White :: CuI2 : Brown
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संबंधित प्रश्न
Write complete balanced equation for the following reaction:
Sulphur dioxide (gas) + Oxgyen (gas) 
Sulphur trioxide (gas)
Balance the given equation:
H2O2 
H2O + O2
Balance the given equation:
AI(OH)3 
AI2O3 +H2O
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are elements.
Give one example of a chemical reaction characterised by formation of a precipitate.
Give one example of an endothermic reaction.
The chemical equations are balanced to satisfy one of the following laws in chemical reactions. This law is know as:
(a) law of conservation of momentum
(b) law of conservation of mass
(c) law of conservation of motion
(d) law of conservation of magnetism
When water is added gradually to a white solid X, a hissing sound is heard and a lot of heat is produced forming a product Y. A suspension of Y in water is applied to the walls of a house during white washing. A clear solution of Y is also used for testing carbon dioxide gas in the laboratory.
(a) What could be solid X? Write its chemical formula.
(b) What could be product Y? Write its chemical formula.
(c) What is the common name of the solution of Y which is used for testing carbon dioxide gas?
(d) Write chemical equation of the reaction which takes place on adding water to slid X.
(e) Which characteristic of chemical reactions is illustrated by this example?
Write word equation for the following skeletal equation:
\[\ce{Ca + O2 → CaO}\]
Write word equation for the following skeletal equation:
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Balance the following chemical equation :
FeS + HCl → FeCl2 + H2S
What information do you get from the equation H2+ Cl2 → 2HCl ?
Balance the following equation :
Fe + O2 → Fe3 O4
Balance the following equation. Also name the products formed.
\[\ce{Ag + S -> Ag2S}\]
Balance the following equation. Also name the product formed.
`"Zn" + "HCI" → "ZnCI" _2 + "H"_2`
Complete the following equation:
CH2 + H5OH `("Hot Conc." H_2SO_4)/`>
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
Balance the following equation:
Pb3O4 → PbO + O2
Balance the following equation:
\[\ce{S + HNO3 -> H2SO4 + NO2 + H2O}\]
Write the balanced chemical equation of the following reaction. potassium bicarbonate + sulphuric acid → potassium sulphate + carbon dioxide + water
Write the balanced chemical equation of the following reaction.
copper + nitric acid → copper nitrate + nitric oxide + water
Write the balanced chemical equation of the following reaction.
iron pyrites(FeS2) + oxygen → ferric oxide + sulphur dioxide
The chemical reactions in which heat is liberated are called endothermic reactions.
Name the substances that are getting oxidised and reduced in the process.
Write word equation for the following molecular equation:
\[\ce{N2 + 3H2 ⇌[Fe - 450°C][200 atoms] 2NH3 + \triangle}\]
Word equation:
State why [+ Δ] indication is seen after NH3.
State what 200 atmospheres – indicates.
State the function of Fe in the above reaction.
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Copper [II] sulphate to sodium hydroxide.
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Pressure
Give reason for the following:
Silver salts are kept in dark coloured bottles.
Balance the following simple equation:
Al + O2 → Al2O3
Balance the following simple equation:
H2S + Cl2 → S + HCl
Balance the following simple equation:
K + H2O → KOH + H2
Balance the following simple equation:
\[\ce{N2 + H2 <=> NH3}\]
With reference to a chemical equation state which of the statements 1 to 5 pertain to A or B.
A: Information provided by a chemical equation.
B: Limitations of a chemical equation.
- The nature of the individual elements.
- The speed of the reaction.
- The state of matter in which the substance is present.
- The completion of the reaction.
- The direction of the reaction.
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.
Fe2O3 + 2H2 → 2Fe + 3H2O
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
2H2O + 2Cl2 → 2HCl + O2
In the chemical equation the _______ are written on the left-hand side.
Match the columns.
| Reactants | Products | Types of chemical reaction | ||
| 1. | MgH2 | → | Mg + H2 | Endothermic |
| 2. | 2H2S + SO2 | → | 3S + 2H2O | Oxidation |
| 3. | CaO + H2O | → | Ca(OH)2 + heat | Exothermic |
| Redox | ||||
What is a reactant in a chemical equation?
