📚NCERT Questions — CBSE11

Which region of the electromagnetic spectrum is used for broadcasting and has frequencies around 10⁶ Hz?

Calculate the oxidation number of phosphorus in H4P2O7.

How many moles of methane (CH4) are required to produce 22 g of CO2 after combustion? (CH4 + 2O2 → CO2 + 2H2O; Atomic masses: C=12, O=16)

What is the magnetic property of Li2?

Which of the following species can act as a Lewis base?

When comparing elements in the same group of the periodic table, what is the primary factor determining acid strength (H-A bond)?

When balancing a chemical equation, what is one crucial rule that must always be followed?

Which of the following molecules would have a non-zero dipole moment?

A 25-watt bulb emits monochromatic yellow light of wavelength 0.57 μm. Calculate the rate of emission of quanta per second. (h = 6.626 x 10⁻³⁴ J s, c = 3.00 x 10⁸ m s⁻¹)

In a balanced thermochemical equation, what do the coefficients refer to?