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प्रश्न
Complete the statement by filling the blank with the correct word from the option.
The ratio of hydrogen & oxygen in water is ____.
विकल्प
2 : 1
1 : 2
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उत्तर
The ratio of hydrogen & oxygen in water is 2 : 1.
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संबंधित प्रश्न
Give balanced chemical equation for the reaction of water with Carbon dioxide.
Give reason of Carbonated drinks are bottled under high pressure.
Explain why:
If distilled water is kept in a sealed bottle for a long time, it leaves etchings on the surface of the glass.
What is the composition of water? In what volume its elements combine?
Give reason for the following:
The percentage of oxygen, in air dissolved in water, is higher than the percentage of oxygen in ordinary air.
Define ‘eutrophication’.
Match the terms in List I with the correct answers in List II.
| List I | List II |
| 1. Solubility in a given solvent decreases with an increase in temperature. | A: Na2SO4.10H2O |
| 2. A white efflorescent crystal | B: NaOH |
| 3. A hygroscopic dehydrating agent | C: Ca(HCO3)2 |
| 4. A deliquescent alkali | D: conc. H2SO4 |
| 5. A substance present in temporary hard water | E: CaSO4 |
Around 97% of water available on earth is ______ water.
A jumbled word is given here. Write the correct form of the word.
QUIFERA
Match the items of Column I with the items of Column II with reference to sewage.
| Column I | Column II | ||
| (a) | Inorganic impurities | (i) | phosphorus and nitrogen |
| (b) | Organic impurities | (ii) | nitrates and phosphates |
| (c) | Nutrients | (iii) | cholera and typhoid |
| (d) | Bacteria | (iv) | pesticides and herbicides |
