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प्रश्न
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
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उत्तर
\[\ce{\underset{\text{Manganse dioxide}}{3MnO2}+\underset{\text{Aluminium}}{4Al}->\underset{\text{Mangenese metal}}{2Al2O3}+\underset{\text{Aluminium oxide}}{Heat}}\]
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संबंधित प्रश्न
Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows.
| Metal | Iron (II) sulphate | Cooper (II) sulphate | Zinc sulphate | Silver nitrate |
| A | No reaction | Displacement | ||
| B | Displacement | No reaction | ||
| C | No reaction | No reaction | No reaction | Displacement |
| D | No reaction | No reaction | No reaction | No reaction |
Use the Table above to answer the following questions about metals A, B, C and D.
- Which is the most reactive metal?
- What would you observe if B is added to a solution of copper (II) sulphate?
- Arrange the metals A, B, C and D in the order of decreasing reactivity.
Differentiate between metal and non-metal on the basis of their chemical properties.
Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
Write equation for the reaction of magnesium with oxygen.
Why does aluminium not react with water under ordinary conditions?
Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
A basic oxide will be formed by the element:
(a) K
(b) S
(c) P
(d) Kr
Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
(a) MgSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Pb
(d) CuSO4 + Fe
In a solution of lead acetate, a strip of metal M was dipped. After some time, lead from the solution was deposited on the metal strip. Which metal is more reactive, M or lead?
Find the odd one out:
