Download App

Water — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYWater2 Marks
Question
Why is water considered a compound?
✓

Answer

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 $H_2O$
$H : O, 2 \times 1 : 16 \times 1 = 1 : 8$
(Atomic mass of $H = 1, O = 16)$
Components of water cannot be separated by physical methods but can be separated by electrolysis of water.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[2 Mark Question Answer]" from Water→Water — all question types→CHEMISTRY STD 9 question papers→ICSE Board STD 9 question papers→ICSE Board question paper generator→

Similar questions

State the origin and health impact of smog.
→
How does ozone layer protect living beings on the surface of the earth?
→
(a) Name an alkali metal other than lithium, sodium and potassium.
(b) Name an alkaline earth metal other than calcium, strontium and barium
(c) Name one halogen other than chlorine, bromine and iodine
(d) Name a non metal having properties similar to carbon.
(e) Name a rare gas other than neon, krypton and xenon.
→
What is soap? For what is it used?
→
Covalent bonds can be single, double or triple covalent bonds. How many electrons are shared in each? Give an example of each type.
→
State the importance of the solubility of $CO_2$ and $O_2$ in water.
→
Write the basic radicals and acidic radicals of the following and then write the chemical formulae of these compounds.
Calcium bromide
→
What is a symbol? What information does it convey?
→
How the temporary and permanent hardness is removed?
→
Element $X$ has electronic configurations $2, 8, 18, 8, 1$. Without identifying $X,$
  1. Predict the sign and charge on a simple ion of $X.$
  2. Write if $X$ will be an oxidizing agent or a reducing agent. Why?
→