Chemistry
Assertion (A): Triatomic molecules consist of four atoms.
Reason (R): Monoatomic molecules contain only one atom.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Answer
A is false but R is true.
Explanation — Triatomic molecule is composed of three similar atoms.
Example: Ozone gas (O3). Hence the assertion (A) is false.
Monoatomic molecule is composed of only one atom.
Examples: Inert gases like Helium, Neon, Argon, etc.
Hence the reason (R) is true.
Related Questions
Assertion (A): The absolute scale of temperature is the Kelvin scale.
Reason (R): Kelvin scale starts from 0°C.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): One litre of hydrogen weighs the same as one litre of oxygen.
Reason (R): One litre of hydrogen contains the same number of molecules as one litre of oxygen.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.