Question

(3) Classify the following substance according to their properties
water, thermocol, soil, iron, coal,
paper, rubber, copper, coir, plastic​

Answer 1

Following are the properties of the substances.

Explanation:

(a) Water:

• Water is a polar molecule.
• It has adhesive, cohesive and evaporating properties.
• It had high specific heat and surface tension.

(b) Thermocol:

• It has low thermal conductivity and is used as thermal insulating material.

(c) Soil:

• Clay soil has water holding capacity. Soil is acidic and basic in nature.

(d) Iron:

• Iron is a soft, ductile malleable and strong metal and has shiny and bright surface.

(e) Coal:

• Coal has cake tendency, ash fusion and properties of resistance.

(f) Paper:

• Paper has tear resisting and moisture retention properties.

(g) Rubber:

• A rubber has tensile strength, tear resistance and specific gravity.

(h) Copper

• Copper is malleable and ductile and has high thermal and electrical conductance.

(i) Plastic:

• Plastics have weather and fire resistance properties.

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Answer 2

Answer:

water=water is polar molecule

thermocouple=it has low thermal conductivity