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प्रश्न
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
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उत्तर
True Solutions: Salt solution and sugar solution.
Colloidal Solutions: Starch solution, ink, and blood
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संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Solids have definite shape and definite volume.
Give one difference between atoms and molecules.
Name a metal which is soft and a non-metal which is hard.
What name is given to those elements which are neither good conductors of electricity like copper nor insulators like sulphur ?
Which of the following are compounds ?
- CO
- No
- NO
- Co
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
What is the concentration of a solution which contains 16 g of urea in 120 g of solution ?
Which one of the following is not a chemical change ?
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
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...............
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
Explain how, nitrogen , oxygen and argon gases are separated from air.
The boiling point of liquid argon 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 ?
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
In Aerosol the dispersed phase is liquid and the dispersion medium is gas.
Higher the temperature, the higher the kinetic energy of particles.
