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प्रश्न
______ react with dil. HNO3 to evolve hydrogen gas.
पर्याय
Iron and copper
Manganese and magnesium
Zinc and manganese
Aluminium and magnesium
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उत्तर
Manganese and magnesium react with dil. HNO3 to evolve hydrogen gas.
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संबंधित प्रश्न
Fill in the blanks from the choices given within brackets:
The compound formed when ethanol reacts with sodium is____ (sodium ethanoate, sodium ethoxide, sodium propanoate).
What is the molecular formula and structure of the alcohol which can be thought to be derived from pentane?
Name the hydrocarbon formed when ethanol is heated with conc. H2SO4 at 170°C? What is this reaction known as?
Name one liquid carbon compound which is being used as an additive in petrol in some countries.
What is meant by denatured alcohol? What is the need to denature alcohol?
How is ethanol prepared by fermentation?
Write the name and molecular formula of an organic compound having its name suffixed with 'ol' and having two carbon atoms in its molecule. Write balanced chemical equation to indicate what happens when this compound is heated with excess conc. H2SO4 and the name of main product formed. Also state the role of conc. H2SO4 in the reaction.
From the given list, name the homologue of the homologous series with the general formula CnH2n.
Choose the correct alternative and rewrite the following:
To observe the hydro and clearly, Raju should see it first under the low power lens and then under the high power lens in order to see _____________
3 mL of ethanol is taken in a test tube and warmed gently in a water bath. A 5% solution of alkaline potassium permanganate is added to the first drop by drop to this solution, then in excess.
- How is a 5% solution of KMnO4 prepared?
- State the role of alkaline potassium permanganate in this reaction. What happens on adding it in excess?
- Write the chemical equation of this reaction.
Ethanol is soluble in water in all proportions.
Complete the following activity.
| Boiling point of ethanol | → | |
| General name of ethanol | → | |
| Use of ethanol | → | |
| Boiling point of ethanoic acid | → | |
| Melting point of pure ethanoic acid | → |
Rectified spirit is an aqueous solution that contains about ______ of ethanol.
How is ethanoic acid prepared from ethanol? Give the chemical equation.
An organic compound ‘A’ is widely used as a preservative and has the molecular formula C2H4O2. This compound reacts with ethanol to form a sweet-smelling compound ‘B’.
Write the chemical equation for its reaction with ethanol to form compound ‘B’.
Give the balanced chemical equation of the following reaction:
Combustion of ethanol.
Give the balance chemical equation of the following reaction:
Combustion of ethanol.
Give the balanced chemical equation of the reaction:
Combustion of ethanol.
Give the balanced chemical equation of the following reaction:
Oxidation of ethanol by acidified potassium dichromate.
