Advertisements
Advertisements
Question
Give one difference between atoms and molecules.
Advertisements
Solution
Atoms may or may not have independent existance. Molecules have independent existance.
APPEARS IN
RELATED QUESTIONS
Intermolecular space is maximum in .......... less in ............ and the least in .........
Liquids have definite volume but do not have definite shape.
Name a liquid which can be classified as a pure substance and conducts electricity.
Name the property which enables metals to be drawn into wires.
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 largest particles ?
How much water should be mixed with 12 mL of alcohol so as to obtain 12 % alcohol solution ?
State whether the following statement is true or false :
Bread is an example of solid foam.
Define solvent.
In what respects does a true solution differ from a colloidal solution ?
Which of the following is not an emulsion ?
Name the source from which nitrogen and oxygen are obtained on a large scale.
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 :
The separation of liquids by fractional distillation is based on the difference in their .....................
Which one of the following scrap metal cannot be separated by magnetic separation ?
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
Intermolecular space is maximum in ______.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
Define the term matter.
