The ratio for the speed of the electron in the 3rd orbit of \( \text{He}^+ \) to the speed of the electron in the 3rd orbit of the hydrogen atom will be

Monochromatic light of wavelength 600 nm is incident from air on to water surface. The frequency of refracted light is

A galvanometer shows full scale deflection for a current of 4 mA. It is converted into an ammeter of range from 0 to 8
A by using a shunt. The ratio of resistance of the galvanometer coil to the resistance of the shunt used is nearly:

Arrange the following electromagnetic waves in decreasing order of their frequencies.
(A) FM radio waves
(B) UV rays
(C) Gamma rays
(D) X-rays
Choose the correct answer from the options given below:

Match List-I with List-II

List-I	List-II
(A) Maximum kinetic energy of photoelectron	(I) No emission of electrons
(B) Photoelectric current	(II) slope of kinetic energy of electron-frequency graph
(C) Frequency of radiation < threshold frequency	(III) independent of intensity
(D) Plank's constant	(IV) independent of frequency

In a meter bridge, the null point is found at a distance of 60 cm from end A. If a \( 5 \text{ } \Omega \) resistor is now connected in series with S, the null point occurs at 50 cm. The values of R and S are, respectively

A solenoid has a core of a material with relative permeability 400. The windings of the solenoid are insulated from the core and carry a current of 1 A. If the number of turns is 800 per metre, the magnetic field inside solenoid will be

Read the paragraph given below and answer the question.
Sutton and Boveri argued that the pairing and separation of a pair of chromosomes would lead to the segregation of a pair of factors they carried. Sutton united the knowledge of chromosomal segregation with Mendelian principles and called it the chromosomal theory of inheritance. Following this synthesis of ideas, experimental verification of the chromosomal theory of inheritance by Thomas Hunt Morgan and his colleagues, led to discovering the basis for the variation that sexual reproduction produced. Morgan worked with the tiny fruit files, which were found very suitable for such studies. They could be grown on simple synthetic medium in the laboratory. They complete their life cycle in a short span of time and a single mating could produce a large number of progeny flies. Also, there was a clear differentiation of the sexes the male and female flies are easily distinguishable. Also, it has many types of hereditary variations that can be seen with low power microscopes.
Which statement is incorrect with respect to Drosophila.

Which of the statements are true, If a convex lens is placed in water:
a. Its focal length increases.
b. Its focal length decreases.
c. Rays bend less when they move through lens.
d. There is no change in radius of curvature.
Choose the correct answer from the options given below :

Answer the question on basis of passage given below :
The noble gases have closed shell electronic configuration and are monatomic gases under normal conditions. The low boiling points of lighter noble gases are due to the weak dispersion forces between the atoms and the absence of other inter atomic interaction. The direct reaction of xenon with fluorine leads to a series of compounds with oxidation numbers \(+2, +4\) and \(+6\).
\(\text{XeF}_4\) reacts violently with water to give \(\text{XeO}_3\). The compound of Xenon exhibit stereoisomerism and their geometries can be deduced considering the total number of electrons in the valence shell.
Structure of \(\text{XeO}_3\) is:

"In the electrochemical series written in the increasing order of reduction potential
(A) The elements which are placed above the hydrogen in the electrochemical series are stronger oxidizing agents.
(B) The elements which are placed above the hydrogen in the electrochemical series are stronger reducing agents.
(C) The elements with the positive electrode potential values lie below the hydrogen in the electrochemical series.
(D) The activity of both the metals and non-metals in the electrochemical series decreases from top to bottom.
Choose the correct answer from the options given below:"

Read the passage carefully and answer the given questions. DNA Fingerprinting
Polymorphism in DNA sequence is the basis of genetic mapping of the human genome as well as of DNA fingerprinting. DNA fingerprinting involves identification of differences in some specific regions in the DNA sequence called repetitive DNA. It works on the principle of polymorphisms in DNA sequences. The repetitive DNA are separated from bulk genomic DNA. The bulk DNA forms a major peak and the other small peaks are referred to as satellite DNA. These repetitive/satellite DNA sequences show a high degree of polymorphisms and form the basis of DNA fingerprinting.
Variable Number of Tandem Repeats are -

Identify the correct combination of statements for sacred groves.
(A) These are in-situ conservation strategies.
(B) These are ex-situ conservation strategies.
(C) These are found in the Khasi and Jaintia hills in Meghalaya.
(D) These hold religious values.
Choose the correct answer from the options given below: