The function \(f(x)=\tan x-x\) for \(x \in\left(0, \frac{\pi}{2}\right)\) is :

The order and degree of the differential equation \(\frac{d^3 y}{d x^3}=\frac{y}{2}+\left(\frac{d y}{d x}\right)^3\), respectively are :

The area bounded by \(y^2=4 x\) and its latus rectum and \(x\)-axis in the first quadrant is:

With reference to square matrices, which one of the following statement is NOT correct ?

Corner points of the feasible region for an LPP are: \((0,2),(3,0),(6,0),(6,8)\) and \((0,5)\). Let \(z=4 x+6 y\) be the objective function. Then, Max \(z\) - Min \(z\) is equal to:

A small start-up started making wafers and distributing them to the retailers. After a week, average sales per week were found to be 150 packets. So, to increase the sales, a strategy was used to change the packaging and add a chocolate worth Rs. 5 as a free gift with the pack. After this, a sample of 17 shops was taken, which showed that sales went up with mean 165 and a standard deviation of 25. Check whether the strategy was effective \(5 \%\), level of significance? [Given \(\left.t_{16}(0.05)=2.12\right]\)

If \(y=\sqrt{2024 x+2025}\), then which of the following is correct?

If set A has 5 elements and set B has 7 elements then number of one-one and onto mapping from A to B is:

The integral \(\int e^x(\tan x+\log \sec x) d x\) is equal to :

When Tt x Tt are crossed, how many percent of the offsprings show a recessive phenotype?

An electric dipole of length 2 cm is placed at an angle of \(30^\circ\) with an electric field \(3 \times 10^5 \text{ N C}^{-1}\). If the dipole experiences a torque of \(9 \times 10^{-3} \text{ N m}\), the magnitude of either charge of the dipole is

A full wave rectifier circuit is operating from 50 Hz mains frequency. In the output, the fundamental frequency in the ripple would be:

Answer the question on the basis of passage given below :
Formaldehyde is the first member of the aldehydic series. It is present in green leaves of plants where its presence is supposed to be due to the reaction of \(CO_2\) with water in the presence of sunlight and chlorophyll. Commercially, formaldehyde is obtained by the controlled oxidation of methane in the presence of molybdenum oxide (\(MoO\)) acting as a catalyst. Formaldehyde is a constituent of a number of polymers also called resins. These are non volatile solids or semi solids which are obtained directly from certain plants and can be synthesized in the laboratory.
Question: How is formalin useful?