Some materials are given below:
(i) Rubber
(ii) Sugar
(iii) Salt
(iv) Cotton
(v) Sponge
(vi) Brick
(vii) Talc powder
(viii) Wood
Identify the materials which are soft and insoluble in water.
A. (i), (ii), (iii), (iv) and (vi) only
B. (i), (iv), (v) and (vii) only
C. (ii), (iii) and (viii) only
D. (ii), (iii) and (vi) only
Answer (2)
The soft and insoluble materials from the list are rubber, sponge, and talc powder. Therefore, the correct answer is option B, which includes materials (i), (iv), (v), and (vii) only. This covers materials that do not dissolve in water and retain their soft properties.
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To solve this question, we need to identify materials that are both soft and insoluble in water from the given list. Let's evaluate each material:
Rubber (i): Rubber is soft and generally insoluble in water.
Sugar (ii): Sugar is soluble in water, so it doesn't fit the criteria.
Salt (iii): Salt is soluble in water, so it doesn't fit the criteria.
Cotton (iv): Cotton is soft and insoluble in water, though it can absorb water.
Sponge (v): Sponges are soft, but they are not entirely insoluble because they can absorb water.
Brick (vi): Bricks are hard and not soft, making them unsuitable.
Talc powder (vii): Talc powder is soft and doesn't dissolve in water.
Wood (viii): Wood is generally hard and not classified as soft.
Upon reviewing the options, the correct combination of soft and insoluble materials in water is Rubber (i), Cotton (iv), and Talc powder (vii).
Thus, the correct answer is (B) (i), (iv), (v), and (vii) only.
