हिंदी

State Whether the Following Statements Are True Or False : Bread is an Example of Solid Foam. Sponge is an Example of Solid Sol.

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प्रश्न

State whether the following statement is true or false :

Bread is an example of solid foam.

विकल्प

  • True

  • False

MCQ
टिप्पणी लिखिए
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उत्तर

True. Solid foam allows the gas to get dispersed in solid medium.

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अध्याय 2: Is Matter Around Us Pure - Very Short Answers [पृष्ठ ७९]

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लखमीर सिंग Chemistry [English] Class 9
अध्याय 2 Is Matter Around Us Pure
Very Short Answers | Q 17.1 | पृष्ठ ७९

वीडियो ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्न

Give one difference between atoms and molecules.


A kind of matter which can sublime is


What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?


There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.

  1. What could the group of materials P be ?
  2. Name the substances Q. Give two examples of such substances.
  3. Name the substances R. Write two examples of such substances.
  4. Name the substances S. Give two examples of such substances.
  5. Out of Q, R and S, which substances are malleable and ductile ?

What is the name of the clear liquid formed when a solid dissolves in a liquid ?


What happens when the temperature of a saturated sugar solution is increased ?


In what respects does a true solution differ from a colloidal solution ?


What will happen if a saturated solution is :

  1. heated
  2. cooled

State whether the following statement are true or false :

Alcohol can be separated from a mixture of alcohol and water by a separating funnel.


State whether the following statement are true or false :

Salt and water can be recovered from an aqueous salt solution by the process of evaporation.


Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.


Explain how, nitrogen , oxygen and argon gases are separated from air.


The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :


A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.

  1. What could P, Q, R and S be ?
  2. How would you separate a mixture containing P, Q, R and S ?

Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.

  1. What could X be ?
  2. What could Y be ?
  3. Name the process Z.
  4. Which process would you use to recover both the components X and Y from tincture of iodine ?
  5. Which process can be used to recover only component Y from tincture of iodine ?

Why wires cannot be drawn from materials such as stone or wood?


Liquids have ______.


Intermolecular space is maximum in ______.


Gases change to liquid by the process of ______.


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