Statement I: Atomic radius increases down a group
Statement II: The higher the atomic number within a group, the smaller the atom.

Both statement i and statement ii are correct and statement II is the correct explanation for statement I

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Both statement I and statement II are correct but statement II is not the correct explanation for statement I

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Statement I is correct but statement II is incorrect

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Statement I is incorrect but statement II is correct

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Both statement I and statement II are incorrect

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Solution

The correct option is C Statement I is correct but statement II is incorrect
Statement I is true whereas Statement II false.
The size of an atom increases down the group. Atomic Radius (half the distance between the centre of two atoms just touching each other) increases moving top to bottom along with an atomic number of elements since the number of electrons or protons increases with increasing atomic number as they are added in new shell farther away from the nucleus.

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Statement I : The formula connecting u, v and f for a spherical mirror is valid only for the mirrors whose sizes are very small as compared to their radii of curvature.

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Statement I: Atomic radius increases down a groupStatement II: The higher the atomic number within a group, the smaller the atom.

Statement I: Atomic radius increases down a group
Statement II: The higher the atomic number within a group, the smaller the atom.