List of top Environmental Sciences Questions on Instrumentation asked in CUET (PG)

Suppose that 0.50 mg of precipitate is lost as a result of being washed with 200 mL liquid. What would be the relative error due to solubility loss if precipitate weighs 50 mg?

In Capillary Electrophoresis, for a representative 50 cm capillary column operated at 30,000 V, typical net mobility for a 10 min migration time is about $2\times10^{-8}\ \text{m}^2\text{s}^{-1}\text{V}^{-1}$. Calculate the number of theoretical plates for an ion having diffusion coefficient $D = 1\times10^{-9}\ \text{m}^2\text{s}^{-1}$.

In mass spectrometry, Resolution power $R$ (the ability to differentiate between two masses) is best represented as: (where $m$ = nominal mass at which peak occurs and $\Delta m$ = mass difference between two resolved peaks)

Arrange the following waste/materials in increasing order of their energy content in terms of Higher Heating Value (HHV) in kJ/kg: A. Natural Gas B. Rubber C. Plastics (mixed) D. Mixed paper E. Mixed/Waste food

Find the limit of resolution of a microscope where the numerical aperture of the objective is 1.4 and the beam of light has a wavelength of 400 nm: