Sorting Materials into Groups - Class 6 - Science
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Extra Questions - Sorting Materials into Groups | NCERT | Science | Class 6
There is a mixture of three solid compounds, $A$, $B$, and $C$. Out of these compounds, $A$ and $C$ are soluble in water, and compound $C$ is sublimable also. In what sequence can the following techniques be used for their effective separation?
I Filtration
II Sublimation
III Crystallisation from water extract
IV Dissolution in water
A (II), (I), (IV), (III)
B (IV), (I), (II), (III)
C (I), (II), (III), (IV)
D (II), (IV), (I), (III)
The correct option is D: (II), (IV), (I), (III).
Here is the sequence of techniques for the effective separation of the mixture of compounds $A$, $B$, and $C$:
(II) Sublimation: First, we utilize sublimation to separate compound $C$ since it is sublimable. This process will directly convert $C$ from solid to gas, leaving $A$ and $B$ behind.
(IV) Dissolution in water: Next, dissolve the remaining mixture of $A$ and $B$ in water. Since $A$ is soluble and $B$ is insoluble in water, $A$ will dissolve while $B$ remains as a solid.
(I) Filtration: Filter the solution to separate the undissolved $B$ from the dissolved $A$. The filter retains solid $B$, and the filtrate contains $A$ in solution.
(III) Crystallisation: Finally, crystallize $A$ from the water solution. By evaporating the water or cooling the solution, $A$ crystallizes out, leaving purified $A$ crystals.
This methodical approach effectively isolates each compound in the sequential steps described.
Beautiful handcrafted articles like boxes and toys are made up of paper pulp in our country. Can you explain how paper pulp, which is made from paper, can be used to make hard boxes and other articles?
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Sign up nowArrange the following numbers in ascending order: 6452, 5426, 6542, 5624.
A) 5426, 5624, 6452, 6542 B) 5426, 5624, 6452, 6542 C) 6542, 6452, 5624, 5426 D) 6542, 6452, 5426, 5624
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Sign up nowQuestions & Answers - Sorting Materials into Groups | NCERT | Science | Class 6
Name five objects that can be made from wood.
Five objects which can be made from wood include:
Furniture (e.g., tables and chairs)
Doors and windows
Musical instruments (e.g., guitars, violins)
Toys (e.g., wooden blocks, puzzles)
Sculptures and decorative items
Select those objects from the following which shine: Glass bowl, plastic toy, steel spoon, cotton shirt
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