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प्रश्न
A kind of matter which can sublime is
पर्याय
water
plastic
milk
iodine
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उत्तर
iodine
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संबंधित प्रश्न
The inter-molecular space is maximum in
Define the term matter. What is it composed of?
Name the terms for the change of vapour into a liquid.
Describe in your own words, what happens to the particles when salt dissolves in water.
Define matter. Give four examples of matter.
What are the characteristics of matter?
Name two solid, two liquid and two gaseous elements at the room temperature.
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.
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
Tincture of iodine has antiseptic properties. This solution is made by dissolving :
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
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 .......................
How will you separate a mixture of iron filings and powdered carbon ?
Explain how, impure copper sulphate can be purified by crystallisation.
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when, liquids B and C are mixed, they form two separate layers :
(a) Which process will you use to separate a mixture of A and B ?
(b) Which method will you use to separate a mixture of B and C ?
(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.
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.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
Liquids cannot be compressed and they have fixed volume.
