Which of the following statements are incorrect?
I. Vinegar and lemon juice form a separate layer on water.
II. Freshly cut surfaces of metals are lustrous.
III. Oxygen gas is transparent while milk is opaque.
IV. Wax when mixed with water forms a solution.

I and II only

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I and IV only

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III and IV only

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None of these

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Solution

The correct option is B I and IV only
I: Vinegar and lemon juice dissolve in water,
II: Freshly cut surfaces of metals are lustrous.
III. Oxygen gas is colourless thus, it is transparent and milk is opaque.
IV: Wax does not dissolve in water, it forms a separate layer with water.

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(i) Lemon juice
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Question 3

Which of the following are not the liquid forms of water?
(i) Snow
(ii) Lake water
(iii) River water
(iv) Water vapour
(v) Ice

Choose the correct combination from the options given below.
(a) (i), (iv) and (v)
(b) (i) and (ii)
(c) (ii) and (iii)
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(iii) Chalk dissolves in water.

(iv) A piece of wood floats on water.

(v) Sugar does not dissolve in water.

(vi) Oil mixes with water.

(vii) Sand settles down in water.

(viii) Vinegar dissolves in water.

Question 6
What happens when calcium is treated with water?

(i) It does not react with water.
(ii) It reacts violently with water.
(iii) It reacts less violently with water.
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a) (i) and (iv) (b) (ii) and (iii)

Q. Question 27.
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(iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule.

(a) (i) only
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Which of the following statements are incorrect?I. Vinegar and lemon juice form a separate layer on water.II. Freshly cut surfaces of metals are lustrous.III. Oxygen gas is transparent while milk is opaque.IV. Wax when mixed with water forms a solution.

The correct option is B I and IV onlyI: Vinegar and lemon juice dissolve in water,II: Freshly cut surfaces of metals are lustrous.III. Oxygen gas is colourless thus, it is transparent and milk is opaque.IV: Wax does not dissolve in water, it forms a separate layer with water.

Which of the following statements are incorrect?
I. Vinegar and lemon juice form a separate layer on water.
II. Freshly cut surfaces of metals are lustrous.
III. Oxygen gas is transparent while milk is opaque.
IV. Wax when mixed with water forms a solution.

The correct option is B I and IV only
I: Vinegar and lemon juice dissolve in water,
II: Freshly cut surfaces of metals are lustrous.
III. Oxygen gas is colourless thus, it is transparent and milk is opaque.
IV: Wax does not dissolve in water, it forms a separate layer with water.