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प्रश्न
Fill in the blank :
The substances which can flow are called ________
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उत्तर
The substances which can flow are called fluids.
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संबंधित प्रश्न
The inter-molecular space is maximum in
Fill in the blank :
The state of matter with definite volume and definite shape is called______
Name one solid, one liquid and one gaseous non-metal.
Which of the following is not an element ?
The property/properties which enable copper metal to be used for making electric wires is/are :
State whether colloidal solutions are homogeneous or heterogeneous.
How much water should be added to 15 grams of salt to obtain 15 per cent salt solution ?
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.
What is meant by a solution?
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and C cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.
(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A. Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
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.
Name the process by which the various gases of the air are separated.
Name the process which can be used to purify an impure sample of copper sulphate.
How is scrap iron separated from a heap of waste materials in factories?
How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?
______ is not made of matter.
Gas-solid is ______.
Write a scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
