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प्रश्न
Name a non-metal which is a good conductor of electricity.
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उत्तर
Graphite is a non-metal that is a good conductor of electricity.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Name the property which allows metals to be hammered into thin sheets.
What are the two types of pure substances? Give one example of each type.
State whether colloidal solutions are homogeneous or heterogeneous.
9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.
Which of the following is not an emulsion ?
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
Name the process which is used in milk dairies to separate cream from milk.
Which of the following cannot be separated from air by the process of fractional distillation ?
The liquid air has three components X, Y and Z whose boiling points are : –186°C, –183°C and –196°C,
respectively. When liquid air is fed into a tall fractional distillation column from near its bottom and warmed
up slowly :
(a) Which component will be collected from near the bottom of the fraction distillation column ? Why ?
(b) Which component will be collected from the top part of the fractional distillation column ? Why ?
(c) Which component will be collected from the middle part of the fractional distillation column ? Why ?
(d) What could the component X, Y and Z be ?
Explain the meaning of the term matter with special reference to the term ‘substance’.
______ is not made of matter.
All the matter made of ______.
The movement of particles in liquids is ______.
Gases change to liquid by the process of ______.
The physical state of water at 373 K is ______.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
Define the term matter.
Write a scientific reason.
Lemon sherbat has a sweet, sour and salty taste and it can be poured in a glass.
