Nature, Properties of Matter and their Measurement (NCERT) - NEET Chemistry

To determine the incorrectly matched units, let's analyse each quantity and its unit:

• Density: The unit is kg m^-3. This is correct because density is mass per unit volume.
• Velocity of light: The unit is m s^-1. This is correct as velocity is distance per unit time.
• Planck's constant: The unit is incorrectly given as J^-1 s^-1. The correct unit is J s (joule-seconds).
• Acceleration: The unit is m s^-2. This is correct because acceleration is velocity change per unit time.
• Force: The unit is incorrectly given as kg m. The correct unit is kg m s^-2 (newtons).

Therefore, the units for Planck's constant and Force are not matched correctly.

pico = 10^-12, femto = 10^-15, milli = 10^-3, giga = 10⁹

Properties of three sates of matter:
(i) Solids and liquids have definite volume whereas gases don't possess definite volume.
(ii) Three states of matter solid, liquid and gas are interconvertible by changing the temperature and pressure conditions.
(iii) Solids are rigid and have definite shape thus don't possess a large degree of freedom.

The incorrect conversion factor is in option D because 1 inch equals exactly 2.54 centimetres, not 3.33 centimetres.

Relation between F^∘ and celcius scale:
^∘F = 9/5^∘ C + 32