When two elements are brought together, they

(a) always form a mixture
(b) always form a compound
(c) may form a mixture of a compound depending on the conditions
(d) may form a mixture or a compound depending on what they like.

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Solution

(c) may form a mixture or a compound depending on the conditions
Not all elements react with each other, and in case they react, they will need a condition favouring such reaction. If the conditions are favourable for the elements to undergo a chemical reaction, they will form compounds. And, mixtures are formed when the conditions are not suitable for the reactions to take place.

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When two elements are brought together, they (a) always form a mixture (b) always form a compound (c) may form a mixture of a compound depending on the conditions (d) may form a mixture or a compound depending on what they like.

When two elements are brought together, they

(a) always form a mixture
(b) always form a compound
(c) may form a mixture of a compound depending on the conditions
(d) may form a mixture or a compound depending on what they like.