During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in table below. Help them in filling the Table.

Name of the material

Appearance (Hard/soft)

Transparency

(Transparent/Translucent/

Opaque)

Floats/ Sinks in water

Soluble/ Insoluble in water

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Solution

Name of the material

Appearance (Hard/soft)

Transparency

(Transparent/Translucent/

Opaque)

Floats/ Sinks in water

Soluble/ Insoluble in water

Lump of salt

Hard

Opaque

Sinks

Soluble

Green grass Soft Opaque Floats Insoluble

Brokem glass Hard Opeque Sinks Insoluble

Thermocol box Soft Opeque Floats Insoluble

Pen Hard Opeque Floats Insoluble

Iron nail Hard Opeque Sinks Insoluble

Glass marbels Hard Transparent Sinks Insoluble

Hair Hard Opeque Floats Insoluble

Glass marbels Hard Transparent Sinks Insoluble

Naphthne ball Hard Opeque Floats Insoluble

A piece sugar candy Hard Opeque Sinks Soluble

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Question 18

During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in table. Help them in filling the table.

$\begin{matrix} Name of the & Appearance & Transparency & Floats/Sinks & Soluble / Material & (Hard/Soft) & (Transparent / & in water & insoluble in Translucent/Opaque) & Water . . . . . . . . . . & . . . . . . . . . . & . . . . . . . . . . & . . . . . . . . . . & . . . . . . . . . . . . . . . . . . . . & . . . . . . . . . . & . . . . . . . . . . & . . . . . . . . . . & . . . . . . . . . . \end{matrix}$

Q. State whether the statements given below are True or False.
(a) Stone is transparent, while glass is opaque.
(b) A notebook has lustre while eraser does not.
(c) Chalk dissolves in water.
(d) A piece of wood floats on water.
(e) Sugar does not dissolve in water.
(f) Oil mixes with water.
(g) Sand settles down in water.
(h) Vinegar dissolves in water.

Q. Classify the following as opaque, transparent or translucent, and luminous or non-luminous.

Air, Water, A piece of red hot iron, An Umbrella, Firefly, Moon

Give one example each of the following combinations of properties. [5 MARKS]

$\begin{matrix} 1. & Lustrous and Hard 2. & Soluble and Opaque 3. & Translucent and Soft 4. & Insoluble and Floating 5. & Sinking and Transparent \end{matrix}$

Q. Write True (T) or False (F) against the following statements in the given brackets:
1. Tree is an opaque substance. ( )
2. All gases are insoluble in water. ( )
3. All things are made up of materials. ( )
4. Kerosene is soluble in water. ( )
5. A piece of wood floats on water. ( )

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Transparency

Standard VI Chemistry

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Name of the material	Appearance (Hard/soft)	Transparency (Transparent/Translucent/ Opaque)	Floats/ Sinks in water	Soluble/ Insoluble in water
Lump of salt	Hard	Opaque	Sinks	Soluble
Green grass	Soft	Opaque	Floats	Insoluble
Brokem glass	Hard	Opeque	Sinks	Insoluble
Thermocol box	Soft	Opeque	Floats	Insoluble
Pen	Hard	Opeque	Floats	Insoluble
Iron nail	Hard	Opeque	Sinks	Insoluble
Glass marbels	Hard	Transparent	Sinks	Insoluble
Hair	Hard	Opeque	Floats	Insoluble
Glass marbels	Hard	Transparent	Sinks	Insoluble
Naphthne ball	Hard	Opeque	Floats	Insoluble
A piece sugar candy	Hard	Opeque	Sinks	Soluble