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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Name the Terms for the Change of a Solid into Liquid.

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प्रश्न

Name the terms for the change of a solid into liquid.

एक शब्द/वाक्यांश उत्तर
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उत्तर

Melting.

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पाठ 1: Matter and Its Composition - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 1 Matter and Its Composition
Exercise | Q 12.1

संबंधित प्रश्‍न

The smallest unit of matter that exists freely in nature is called ...........


What do you mean by the inter-molecular spaces? How do they vary in different states of matter?


Gases have definite volume but no definite shape.


Which one is a kind of matter:


Name two processes which provide the best evidence for the motion of particles in matter.


Name a metal which forms amalgams.


Which one of the following is not a metalloid ?


Out of a colloid, solution and a suspension :

which one has the smallest particles ?


Define Sol and give one example.


Define Foam Give one example.


What will happen if a saturated solution is :

  1. heated
  2. cooled

The solubility of ammonium chloride in water at various temperatures is given below :

Temperature : 10°C 20°C 40°C 60°C 80°C
Solubility : 24 g 37 g 41 g 55 g 66 g

What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?


Name the process which can be used to recover salt from an aqueous salt solution.


Name the process by which common salt is obtained from sea-water.


Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?


Describe a method to separate a mixture of camphor and sand.


Which of the following mixture cannot be separated by using water as the solvent ?


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 ?

Asmita went to buy an earthen pot. There she saw many things kept for sale.
How did she identify what she needed?


Asmita went to buy an earthen pot. There she saw many things kept for sale.
From what substance has the potter made all the things?


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