The ratio of maximum frequency and minimum frequency of light emitted in Balmer series of hydrogen spectrum is

The ratio of total energy to the kinetic energy of an electron in a Bohr orbit of the hydrogen atom is

Light with an energy flux of \( 18 \text{ W/cm}^2 \) falls at normal incidence on a non-reflecting surface of area \( 20 \text{ cm}^2 \). If the light falls for 30 minutes on the surface, find the total momentum delivered to the surface.

In a Young double slit experiment, if one of the slit is covered with a black paper then:

Two galvanometers have identical characteristics. One of them is converted into a milliammeter and the other into a microammeter. The shunt resistance of microammeter as compared to milliammeter will be :

Six charges each +3q are placed at the corners of a regular hexagon of each side 'a'. The electric field at the center of the hexagon is:

Choose the correct statements :
(A) A nuclide is represented as \( ^A_Z X \)
(B) Nuclids with same number of protons are called isotopes
(C) \( \alpha \)-ray scattering experiments allow determination of the nuclear radius
(D) Nuclids with same number of neutrons are called isotones
(E) The nuclear force distinguishes between neutron and proton
Choose the correct answer from the options given below :

Which of the following is male sex hormone ?

A measure of an average yearly growth of an investment over a certain time period when returns are reinvested is

The chromosome number per cell is 46 in:

Select which step/s out of the following doesn't/don't belong to the process of decomposition.
(A) Fragmentation
(B) Humification
(C) Anabolism
(D) Mineralisation
(E) Leaching
Choose the correct answer from the options given below:

Read the passage carefully and answer the Questions
Alcohols and phenols are obtained when a hydrogen atom in aliphatic and aromatic hydrocarbons respectively, is replaced by \(OH\) group. These compounds find wide applications in industry as well as in our daily life. You may notice that ordinary spirit is used for polishing wooden furniture which is chiefly a compound containing hydroxyl group. An alcohol contains one or more hydroxyl \((OH)\) group(s) directly attached to carbon atom(s), of an aliphatic system \((CH_3OH)\) while a phenol contains \(OH\) group(s) directly attached to carbon atom(s) of an aromatic system \((C_6H_5OH)\). Alcohols are prepared by the hydration of alkenes, fermentation of glucose, and reduction of carbonyl compounds. Alcohols produce alkenes upon dehydration whereas alkenes on acid catalyzed hydration convert into alcohols.
An alkyl halide can be converted into alcohol through:

The function \(f(x)=\frac{x}{(x-2)(x-3)(x-5)}, x \in R\) is :