Two substances P and Q when brought together, form substance R with the evolution of heat. The properties of R are different from both P and Q. What is substance R?

A compound

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An element

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A metal

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A mixture

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Solution

The correct option is A A compound
Since the substance $R$ is a mixture of two substances, it may either be a mixture or a compound
In a mixture the constituents retain their properties while in a compound, they lose their properties.
Since the question mentions that $R$ has different property from both $P$ and $Q$ , hence it must be a compound

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Similar questions

Two substances A and substance B when brought together forms a substance C with liberation of heat .the properties of C are entirely different from those of A and B. What is substance C ?
a) metal
B) element
C) compound
D) mixture

Q. When two substances A and B are powdered together in a pestle and mortar, a large amount of heat is released and a new substance C is formed. What is the nature of the new substance?

Study the information given below:

1) Some substances are formed when two or more elements combined together chemically.
2) Properties of these substances are different from their respective constituents.
3) These substances cannot be broken down into their respective constituents by physical methods.

Which of the following substance has the properties listed above?

Which of these physical properties do not change when two different substances are used to form a mixture?

Q. Assertion :Elements and compounds are the examples of pure substances. Reason: The properties of a compound are different from those of its constituent elements.

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