Daily NEET MCQ- April 14, 2022 - NEET MCQ

Alloys like constantan or manganin are used for making standard resistance coils due to their high resistivity values and very small temperature coefficient.

Temperature coefficient of resistance is per degree celsius resistance change factor. hence unit is of inverse temperature i.e. °C^–1.

Given, [A] = 0.5 M, [B] = 0.1 M and k= 0.03
From the rate law it is evident that the order of the reaction is 1+ 0.5 = 1.5 = 3/2
Therefore the unit of k= (mol L^-1)^1-1.5 s^-1 = (L/mol)^1/2 s^-1
R= k[A]¹[B]^1/2 = 0.03 × 0.5 × 0.1^1/2 = 4.74 × 10^-2(L/mol)^1/2 s^-1.

Given,
[A] = 0.75 M, k= 0.02
The reaction belongs to pseudo first order reaction so, the unit is s^-1
R= k [A]= 0.02 × 0.75= 0.015 s^-1.

The sequence of successional stages occurring on bare rocks is known as xerarch succession. The pioneering species lichens are replaced by mosses in a xerosere. Some examples of mosses are Tortula, Grimmima, Polyerichum, etc.

The sequence of successional stages occurring on bare rocks is known as xerarch succession. In a xerarch succession, the pioneering species lichens release acids to dissolve rocks. This helps in weathering and soil formation.

The sequence of successional stages occurring on bare rocks is known as xerarch succession. In a xerarch succession, the pioneering species lichens release acids to dissolve rocks. This helps in weathering and soil formation.

The sequence of successional stages occurring on bare rocks is known as xerarch succession. The mosses are replaced by the herbaceous plants in a xerarch succession. Some examples of xeric grasses are Aristida, Solidage, Poa, etc.

The sequence of successional stages occurring on bare rocks is known as xerarch succession. The herbaceous plants are replaced by the shrubs in a xerarch succession. Some examples of shrubs are Phytocarpus, Rhus, etc.

Since it is an elementary reaction, its rate law r₁= k [A] ³[B]
When the concentrations are changed the new rate will be r₂= k (2[A])³([B]/2) = 4k[A]³[B]
So, r₂=4r₁.