The plane 2x -2y + z + 12 = 0 touches the sphere x² + y² + z² – 2x – 4y + 2z – 3 = 0 at the point

The IUPAC name 'of is:

The IUPAC name of the compound
is:

The correct name of
is:

Which one of the following is the heterocyclic compound?

(A) If two compounds have the same empirical formula but different molecular formula, they have same vapour density.
(R) g/mL is the unit of vapour density.

The desiccants used for absorbing water during Liebig's method for estimation of carbon and hydrogen are:

Formula which represents a simple ratio of atoms of different elements present in a molecule of the substance is called:

If a sphere of constant radius k passes through the origin and meets the axis in A, B, C then the centroid of the triangle ABC lies on

Hence option 2 is correct

The equation of the sphere circumscribing the tetrahedron whose faces are x = 0, y = 0, z = 0 and is equal to

The lines and are coplanar if l is