📚NCERT Questions

What is the role of villi in the small intestine?

How many radial nodes does a 3s orbital have?

For an element to undergo disproportionation, what must be true about its oxidation states?

Why is chemical communication (hormones) advantageous over electrical impulses for widespread, persistent effects in multicellular organisms?

Which of the following represents an oxidation half-reaction?

What is the standard state of a substance at a specified temperature?

The work function for caesium atom is 1.9 eV. Calculate the threshold frequency (ν₀). (1 eV = 1.602 x 10⁻¹⁹ J, h = 6.626 x 10⁻³⁴ J s)

Einstein's equation for the photoelectric effect relates the energy of the incident photon (hν) to the work function (hν₀) and the kinetic energy of the ejected electron (½m_ev²). Which option correct

During the electrolysis of water, if the volume of hydrogen gas collected is 10 mL, what would be the approximate volume of oxygen gas collected?

The growth of plant shoots towards light is known as: