📚NCERT Questions
1,675 solved questions with detailed explanations
At 60°C, dinitrogen tetroxide (N₂O₄) is 50% dissociated into NO₂. Calculate the standard free energy change (Δ_r G°) at this temperature and at one atmosphere. (R = 8.314 J K⁻¹ mol⁻¹)
When an alkyl aryl ether (e.g., anisole) reacts with HI, which bond is preferentially cleaved, and what are the products?
Which of the following is NOT a stated application of DNA fingerprinting?
Which of the following is NOT a typical anion (X-) found in diazonium salts (R-N2+X-)?
How many significant figures are in the number 285 cm?
An atom of an element contains 29 electrons and 35 neutrons. Deduce the atomic symbol of the element.
Calculate the wavelength of electromagnetic radiation emitted by a transmitter broadcasting at a frequency of 1368 kHz. (Speed of light c = 3.00 x 10⁸ m s⁻¹)
In a metal displacement reaction, the reducing metal is typically:
If a person's body is unable to maintain a balanced metabolism of carbohydrates, proteins, and fats, which hormone might be deficient?
For the reaction H2(g) + I2(g) <=> 2HI(g), Kc = 57.0 at 700 K. If at a certain time, the molar concentrations are [H2] = 0.10 M, [I2] = 0.20 M, and [HI] = 0.40 M, in which direction will the reaction