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प्रश्न
Give reasons for the following:
Naphthalene and camphor cannot be separated by sublimation.
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उत्तर
Because both of these are sublimable solids and they sublimes on heating.
संबंधित प्रश्न
Which of the following are homogeneous in nature ?
- ice
- wood
- soil
- air
Write “true” or “false” for the following statement
A pure substance consists of only one kind of atom or molecule.
Tick (√) the correct alternative from the choice given for the following statement:
A mixture of mustard oil and water forms
Give a reason why sublimable and non-sublimable substances can be separated easily, but two sublimable substance cannot.
State whether the following statement is true or false. If false write – the correct statement.
Components in a mixture are present in a definite proportion.
State whether the following statement is true or false. If false write – the correct statement.
Sodium chloride and water is an example of a mixture of elements and compounds.
State what information is provided by the formula of calcium hydroxide – Ca(OH)2
The ‘sea-water’ can be classified as a homogeneous as well as a heterogeneous mixture. Comment.
Mixtures are impure substances.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
