Advertisements
Advertisements
Question
Why is water considered a compound?
Advertisements
Solution
Water is considered a compound because it is made of two elements hydrogen and oxygen combined in the ratio 1:8 by mass.
Mass ratio of elements H2O
H : O, 2 × 1 : 16 × 1 = 1 : 8
(Atomic mass of H = 1, O = 16)
Components of water cannot be separated by physical methods but can be separated by electrolysis of water.
APPEARS IN
RELATED QUESTIONS
Give balanced chemical equation for the reaction of water with Carbon dioxide.
Give balanced chemical equation for the reaction of water with Sodium oxide.
Why is it said that water is life?
Answer in your own words.
Why is there a shortage of water even though it occupies about 71% of the earth’s surface?
Explain any two environmental impacts of an ‘oil spill’.
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 |
Match Column I with Column II
| Column I | Column II | ||
| (a) | Ground water | (i) | Solid form of water |
| (b) | Bawri | (ii) | Wastage of water |
| (c) | Snow | (iii) | Water management |
| (d) | Drip irrigation | (iv) | Small water |
| (e) | Leaking taps | (v) | Water table |
Pick from the following one chemical used to disinfect water.
In a filtration, plant water is filtered using layers of
Why is there a need for conserving water? Give two reasons.
