Class 12th

In Young's double slit arrangement, slits are separated by a gap of 0.5 mm, and the screen is placed at a distance of 0.5 m from them. The distance between the first and the third bright fringe formed when the slits are illuminated by a monochromatic light of 5890 Å is:

Given below are two statements:
Statement I: Retardation factor (R f) can be measured in meter / centimeter.
Statement II: R f value of a compound remains constant in all solvents.
Chose the most appropriate answer from the options given below:

The above reaction requires which of the following reaction conditions?

An oil drop of radius 2 mm with a density 3gcm?³ is held stationary under a constant electric field 3.55 * 10? Vm?¹ in the Millikan's oil drop experiment. What is the number of excess electrons that the oil drop will possess? Consider g = 9.81 m/s².

Given below are two statements:
Statement I: Potassium permanganate on heating at 573 K forms potassium manganate.
Statement II: Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature.
In the light of the above statements, choose the most appropriate answer from the options given below:

Reducing smog is a mixture of :

A soft drink was bottled with a partial pressure of CO? of 3 bar over the liquid at room temperature. The partial pressure of CO? over the solution approaches a value of 30bar when 44 g of CO? is dissolved in 1 kg of water at room temperature. The approximate pH of the soft drink is * 10?¹ /
(First dissociation constant of H?CO? = 4.0 * 10?; log 2 = 0.3; density of the soft drink = 1 g mL?¹)

The number of chiral carbon(s) present in peptide, lie-Arg-Pro, is

An oxidation - reduction in which 3 electrons are transferred has a ∆Gº of 17.37 kJ mol⁻¹ at 25°C. The value of E°cell (in V is _ * 10⁻²)(1 F = 96,500Cmol⁻¹)

The total number of coordination sites in ethylenediaminetetraacetate ( EDTA ?) is
(Coordination)