Advertisements
Advertisements
Question
Which of the following is a mixture ?
Salt, Air, Water, Alum, Sugar
Solution
Among the given options, air is a mixture as it is composed of different gases.
APPEARS IN
RELATED QUESTIONS
Name two processes which provide the best evidence for the motion of particles in matter.
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
Fill in the following blanks with suitable words :
Brass is an alloy which is considered a ..............
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
The element which is not common between the compounds called baking soda and soda ash is
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 most common way of expressing the concentration of a solution ?
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
How will you test whether a given solution is a colloidal solution ?
Define Foam Give one example.
What is the difference between colloids and suspensions ?
Describe a method to separate a mixture of camphor and sand.
How will you separate water from mustard oil ?
Explain how, impure copper sulphate can be purified by crystallisation.
Which of the following mixture cannot be separated by using water as the solvent ?
The best way to recover sugar from an aqueous sugar solution is :
Asmita went to buy an earthen pot. There she saw many things kept for sale.
What is the difference between a substance and an object?
Rusting of an article made up of iron is called
The phenomenon of Evaporation takes place at the ______ of a liquid.
