Download App

Is Matter Around Us Pure — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure3 Marks
Question
Which separation techniques will you apply for the separation of the following? 
  1. The different pigments from an extract of flower petals.
  2. Butter from curd.
  3. Oil from water.
  4. Tea leaves from tea.
  5. Iron pins from sand.
  6. Wheat grains from husk.
  7. Fine mud particles floating in water.
✓

Answer

  1. Different pigments from an extract of flower petals.
  2. Butter from curd Centrifugation.
  3. Oil from water Using separating funnel.
  4. Tea leaves from tea Filtration.
  5. Iron pins from sand Magnetic Separation.
  6. Wheat grains from husk Winnowing.
  7. Fine mud particles suspended in water Centrifugation.

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 "Answer the questions.[Che-3M]" from Is Matter Around Us Pure→Is Matter Around Us Pure — all question types→Science STD 9 question papers→CBSE Board STD 9 question papers→CBSE Board question paper generator→

Similar questions

Give an example in which physical and chemical changes take place together.
→
How are given mass, molar mass and number of moles related to each other?
→
Explain why, we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert.
→
Three different atoms of oxygen are represented as:

$^{16}_{\ 8}\text{O},\ ^{17}_{\ 8}\text{O}\text{ and }^{18}_{\ 8}\text{O}$

  1. What do the subscripts (lower figures) and superscripts (upper figures) represent?
  2. What factor is responsible for the change in the superscripts 16, 17 and 18, though the element is the same?
  3. What is the usual name for such atoms of an element?
  4. Give the nuclear composition of $​​^{18}_{\ 8}\text{O}$
→
Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.
→
How will you demonstrate that water vapour is present in air?
→
Define solubility. How does solubility of a solid in water change with temperature?
→
How will you separate a mixture of iron filings and sulphur powder without using carbon disulphide?
→
Complete the following table.
ElementsAtomic numberMass numberProtonsElectronsneutronsElectronic configurationValency
Chlorine17_________18______
Silicon___28___14_________
Fluorine______9___10______
→
Nucleus of an atom is positively charged and electrons around it are negatively charged. Then why do electrons not just fall to the nucleus out of attraction?
→