Class 12th

If a person is suffering from the deficiency of nor - adrenaline, what kind of drug can be suggested?

A diatomic molecule X₂ has a body centered cubic (bcc). The density of the molecule is 6.17 g cm⁻³. The number of molecules present in 200 g² of X₂ is: (Avogadro constant (NA) = 6 * 10²³ mol⁻¹)

A parallel plate capacitor whose capacitance C is 14 pF is charged by a battery to a potential difference V = 12V between its plates. The charging battery is now disconnected and a porcelain plate with k = 7 is inserted between the plates, then the plate would oscillate back and forth between the plates with a constant mechanical energy of . pJ. (Assume no friction)

If an electron is moving in the nth orbit of the hydrogen atom, then its velocity (v_n) for the nth orbit is given as :

A flask contains a mixture of compounds A and B. Both compounds decompose by first - order kinetics. The half lives for A and B are 300 s and 180 s, respectively. If the concentrations of A and B are equal initially, the time required for the concentration of A to be four times that of B (in s) is: (Use ln 2 = 0.693 )

An AC current is given by I = I₁sinωt + I₂cosωt. A hot wire ammeter will give a reading:

Identify the correct molecular picture showing what happens at the critical micellar concentration (CMC) of an aqueous solution of a surfactant

A solenoid of 1000 turns per meter has a core with relative permeability 500. Insulated windings of the solenoid carry an electric current of 5 A. The magnetic flux density produced by the solenoid is: (permeability of free space = 4π*10^-7H/m)

The output of the given combination gates represents:

Which level of the single ionized carbon has the same energy as the ground state energy of hydrogen atom?