List of practice Questions

What is the drug used to control depression and hypertension?
If the de Broglie wavelength of an electron is \( 2 \, \text{nm} \), then its kinetic energy is nearly (Planck's constant \( = 6.6 \times 10^{-34} \, \text{J s} \) and mass of electron \( = 9 \times 10^{-31} \, \text{kg} \))
Choose the incorrect statement from the following
The sum of two point positive charges separated by a distance of 1.5 m in air is \( 25 \, \mu\text{C} \). If the electrostatic force between the two charges is 0.6 N, then the difference between the two charges is
Two bodies A and B of masses 20 kg and 5 kg respectively are at rest. Due to the action of a force of 40 N separately, if the two bodies acquire equal kinetic energies in times \( t_A \) and \( t_B \) respectively, then \( t_A : t_B = \)
If the tension in the horizontal wire shown in the figure is 30 N, then the weight \( W \) and tension in the wire \( OA \) are respectively:
tension in the horizontal wire
A particle is executing simple harmonic motion with amplitude \( A \). At a distance \( x \) from the mean position, when the particle is moving towards the extreme position, it receives a blow in the direction of motion that instantaneously doubles its velocity. The new amplitude of the particle is:
The height of ceiling in an auditorium is 30 m. A ball is thrown with a speed of \( 30 \, \text{m s}^{-1} \) from the entrance such that it just moves very near to the ceiling without touching it and then it reaches the ground at the end of the auditorium. Then the length of auditorium is [Acceleration due to gravity \( = 10 \, \text{m s}^{-2} \)]
As shown in the figure, the work done to move the charge 'Q' from point C to point D along the semi-circle CRD is
work done to move the charge ’Q’ from point C to point D
The difference between the radii of \(3^{rd}\) and \(2^{nd}\) orbit of H-atom is x pm. The difference between the radii of \(4^{th}\) and \(3^{rd}\) orbit of \( \text{Li}^{2+} \) ion is y pm. \(y:x\) is equal to
If a proton and an alpha particle are accelerated through the same potential difference, then the ratio of their de Broglie wavelengths is:
The magnetic field at the center of a long solenoid having 400 turns per unit length and carrying a current $I = 6.24 \times 10^{-7$ A is}
The layer of the atmosphere that reflects low frequency (LF) electromagnetic waves during daytime only is
The metal purified by Mond process is X. The number of unpaired electrons in X is
Match the following:

List I
A) Mechanical support at young stem and leaf petiole
B) Cells in fruit walls of nuts
C) Cells absent in primary phloem
D) Endarch primary xylem

List II
I) Sclereids
II) Stem vascular bundles
III) Collenchyma tissue
IV) Bast fibers
Phenomenon that describe the first action spectra of photosynthesis:

I. Illumination of Cladophora
II. Detection of O$_2$ release using anaerobic bacteria
III. Accumulation of aerobic bacteria in red and blue light
IV. Cladophora in suspension of anaerobic bacteria
Find the mismatched pair:

Match the following molecules with their bond angles:

List-I (Molecule) List-II (Bond angle) 
A) \(\mathrm{NH}_3\) I) 102.2° 
B) \(\mathrm{O}_3\) II) 107.8° 
C) \(\mathrm{S}_6\) III) 93.6° 
D) \(\mathrm{PH}_3\) IV) 117° 
Identify the pair which is not correctly matched:
Choose the correct statements among the following
I. Exine exhibits an array of patterns and designs.
II. Tapetum layers of microsporangium will be useful for the dehiscence.
III. The intine wall of pollengrains is made up cellulose and pectin.
IV. By wall formation, 8 celled embryo sac is developed.
Choose the correct statements among the following
I. Epidermal cells have more cytoplasm and small vacuole.
II. Outer walls of guard cells are thick and inner walls are thin.
III. Presence of phloem on either side of xylem is seen in bicollateral vascular bundles.
IV. Trichomes of shoot system are multicellular.

Study the following regarding genetic disorders and identify the correct statements.
I) Cystic fibrosis follows an autosomal dominant inheritance pattern.
II) Thalassemia is caused by mutation affecting haemoglobin synthesis
III) Sickle cell anaemia results from a point mutation in the β-globin gene.
IV) Phenylketonuria (PKU) is an X-linked recessive disorder.
 

Identify the artificial sweetener which has highest sweetness value compared to cane sugar
A sophisticated instrument designed by J.C. Bose was so sensitive that is could record even the minute growth of a plant upto a millionth part of millimeter is
Analogous organs arise due to