Question

2. State whether the statement is True (T) or False (F):
(a) Magnesium burns in air with a dazzling white light.
(b) Non-metals react with dilute acids.
(c) Sodium and potassium play an important role in conduction of messages to the
nervous system and in the contraction of muscles.
(d) Non-metals generally react with water.​

Answer 1

Answer:

True

False

True

False

Explanation:

Are you in Seedling Modern High school. 8th class

Answer 2

Answer:

a. True

b. False

c. True

d. False

Explanation:

a. Mg [Magnesium] burns with a white dazzling light as it forms Magnesium oxide by reacting with the oxygen present in air.

b. Non-metals do not react with acids. This is due to the fact that a substance undergoing reaction with acids, donates electrons to the H+ ions produced by the acids. But non-metals are acceptor of electrons and hence they do not donate electron to the hydrogen ion of the acid. As a result they do not react with dilute acids. But there are some exceptions.

c. Sodium and Potassium play an important role because ATP [ adenosine triphosphate ] is formed by an inorganic phosphate molecule held in high-energy linkage with a molecule of adenosine diphosphate (ADP). When an enzyme in the pump, called sodium-potassium-ATPase, splits the phosphate from the ADP, the energy released powers the transport action of the pump.

d. Usually non metals do not react with water. But their oxides do to give acidic solution.

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