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7th ICSE
IMPORTANT
Earn 100

If fractional distillation is carried out using a liquid-liquid mixture, one liquid will remain in the flask & the other will be collected in the receiver. Give the reason for this statement.

Important Questions on Elements, Compounds & Mixtures

MEDIUM
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 3 - Elements, Compounds & Mixtures>OBJECTIVE TYPE QUESTIONS>Q 4
Evaporation of a common salt solution or sea water, leaves behind common salt inside the evaporating dish after heating. Give the reason for this statement.
MEDIUM
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 3 - Elements, Compounds & Mixtures>OBJECTIVE TYPE QUESTIONS>Q 4
Components in a mixture are present in varying proportions and not in a fixed proportion. Give reason for this statement.
MEDIUM
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 3 - Elements, Compounds & Mixtures>OBJECTIVE TYPE QUESTIONS>Q 4
Gunpowder is an example of a heterogeneous mixture. Give the reason for this statement.
HARD
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 3 - Elements, Compounds & Mixtures>OBJECTIVE TYPE QUESTIONS>Q 4

In chromatography, the absorbent medium e.g. Whatman filter paper is known as the - stationary phase. Give reason for this statement.

HARD
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 3 - Elements, Compounds & Mixtures>OBJECTIVE TYPE QUESTIONS>Q 5
The non-sublimable solid from a mixture of iodine & potassium nitrate.
HARD
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 3 - Elements, Compounds & Mixtures>OBJECTIVE TYPE QUESTIONS>Q 5
The heavier liquid component from - mercury & water.
HARD
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 3 - Elements, Compounds & Mixtures>OBJECTIVE TYPE QUESTIONS>Q 5
Which one has the lower boiling point component among methyl alcohol and water?
HARD
7th ICSE
IMPORTANT
Simplified Chemistry>Chapter 3 - Elements, Compounds & Mixtures>OBJECTIVE TYPE QUESTIONS>Q 5
The compound containing one atom of sulphur & two atoms of oxygen.