Download App

Water — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYWater2 Marks
Question
State any three methods of crystallisation.
✓

Answer

In the laboratory, crystals may be obtained by the following methods:
By cooling a hot saturated solution gently
By cooling a fused mass
By sublimation
By slowly evaporating a saturated solution

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

What is the importance of dissolved impurities in water?
→
(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.
→
State the origin and health impact of smog.
→
Write the electronic configuration of element$_{17}T^{35}.$
  1. What is the group number of $T?$
  2. What is the period number of $T?$
  3. How many valence electrons are there in an atom of $T?$
  4. What is thevalencyof $T?$
  5. Is it a metal or non-metal?
  6. State number of protons and neutrons in$ T.$
→
What is a synthesis? To which kind of chemical reactions belongs synthesis? Support your answer by an example.
→
${ }^{20} \mathrm{Ne}_{10}{ }^{21} \mathrm{Ne}_{10}$ and ${ }^{22} \mathrm{Ne}_{10}$ are the isotopes of neon.
(a) What do the subscripts and superscripts represent
(b) What is the cause of change in superscripts?
(C) Give the geometric diagram of 22Ne10
→
Mendeleev's contributions to the concept of a periodic table laid the foundation for the Modern Periodic Table. Give reasons.
→
Name the fundamental law that is involved in every equation.
→
Give the orbital diagram of the following:
Magnesium chloride
→
How does water gets polluted by the household waste?
→