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प्रश्न
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
विकल्प
True
False
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उत्तर
False.
Matter can exist in different states.
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संबंधित प्रश्न
Define the term matter. What is it composed of?
Fill in the blank
Any matter which has a definite _______ but no definite shape is called a _______
Name two processes which provide the best evidence for the motion of particles in matter.
What is the scientific name of particles which make up mater?
State two characteristics of matter demonstrated by Brownian motion.
The three important metalloids are.............................. and ..........................
What is the other name for impure substances ? Give two examples of impure substances.
On the basis of composition of matter, milk is considered to be :
Choose the correct answer.
A 15% alcohol solution means :
Name the different types of solutions. Give one example of each.
What will happen if a saturated solution is :
- heated
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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.
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
The material which is added to water during purification process at the water works so as to disinfect it is :
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 ?
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?
______ is used for industrial refrigeration and transporting frozen food.
Define the term matter.
