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The electron density between 1s and 2s orbital is (A) High (B) Low (C) Zero (D) Abnormal

Zero We know the region between 1s and 2s orbital is a nodal plane. Nodal plane is the region in which the probability of finding an electron is... View Article

Mention some special features of tribal societies

Following are some special features of tribal societies 1. These societies did not follow the social rules and rituals prescribed by the... View Article

How many lines are there which are parallel to X axis and having a distance 5 units?

The equation of a line parallel to the X-axis is in the form y = b. Equations of the lines are y = 5 and y = -5. There can be two lines... View Article

Hairy leaves of many plants are associated with (A) resistance to insect pests (B) resistance to viruses (C) resistance to fungi (D) resistance to bacteria

Resistance to insect pests Hairy leaves of many plants are associated with resistance to insect pests. Example: resistance to cereal leaf beetle... View Article

Loading is a process in which (A) Impurities become heavy and sink to the bottom (B) Impurities float on the top (C) Impurities vaporize (D) None of these

Impurities become heavy and sink to the bottom Loading is a process in which heavy particles settle down at the bottom of the container and... View Article

In the resting muscle fibre, tropomyosin partially covers (A) calcium binding sites on troponin (B) actin binding sites on myosin (C) myosin binding sites on actin (D) calcium binding sites on actin

Myosin binding sites on actin Tropomyosin is a protein found in the actin filaments in muscles. When the muscle is at rest, the tropomyosin... View Article

Establish the formula for the capacity of spherical capacitor

A and B are two co-centric hollow sphere separated by a dielectric medium between them : B is connected to earth +q charge is given to A and... View Article

What is the angular speed of the minute hand of a clock? If the minute hand is 5 cm long. What is the linear speed of its tip?

Given R = 5 cm = 5 x 10-2m T = 1 hr = 3600 s We need to find angular velocity and linear velocity of the tip Formulae ω = 2π/T... View Article

Cholesterol is synthesised in (A) Brunner’s gland (B) Pancreas (C) Liver (D) Spleen

Liver Cholesterol is an organic compound, fat-like insoluble waxy substance which is found in all the cells of our body and is circulated... View Article

Father of angiology is (A) William Harvey (B) Batson (C) Marcello Malpighi (D) Landsteinar

William Harvey The father of Angiology is William Harvey. Angiology is a branch of medical science that deals with the study of the diseases of... View Article

On what factors does the value of gravitational force depend

Gravitational force depends on the following factors 1. The masses of the two bodies involved 2. The distance between the two bodies... View Article

Fill in the blank with a correct adjective or an adverb. He was shouting _________ at me (A) loud (B) to loud (C) louding (D) loudly

He was shouting loudly at me Loudly refers to an adverb that can be used to describe the way he was shouting. Hence, the correct word is loudly.... View Article

What numbers should be added to (-5/8) so as to get (-3/2)?

As per the problem, let us assume x be the number to be added So, (-5/8) + x = (-3/2) x = (-3/2) + (5/8) x = (-12 + 5)/8 We get, x = (-7/8)... View Article

A glass cylinder with diameter 20 cm has water to a height of 9 cm. A metal cube of 8 cm edge is immersed in it completely. Calculate the height by which water will rise in the cylinder

Given Diameter of the cylinder = 20 cm Height of the water in the cylinder = 9 cm So, the radius of the cylinder = 20/2 = 10 cm Suppose the... View Article

There are 11 pairs of ribs in man. (A) True (B) False

False There are 12 pairs of ribs in man. Hence, the given statement is false So, the correct option is (B)... View Article

Wavelength of light used in an optical instrument are λ1 = 4000 Å and λ2 = 5000 Å, then ratio of their respective resolving powers (corresponding to λ1 and λ2) is (A) 16:25 (B) 9:1 (C) 4:5 (D) 5:4

We know that, Resolving power of an optical instrument ∝ 1/λ Given λ1 = 4000 Å λ2 = 5000 Å Resolving... View Article

Photons with energy 5 eV are incident on a cathode C in a photoelectric cell. The maximum energy of emitted photoelectrons is 2 eV. When photons of energy 6 eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is: (A) -3V (B) +3V (C) +4V (D) -1V

Given Energy of photons is, E = 5 eV The kinetic energy of the photons is ϕ = 2 eV Hence, From the Einstein's photoelectric equation, we get,... View Article

Prove that the bisector of interior angles of a parallelogram form a rectangle

Assume that ABCD is a parallelogram. Let P, Q, R, S be the point of intersection of bisectors of ∠A and ∠B, ∠B and ∠C, ∠C and... View Article

A and B throw a die alternatively till one of them gets a 6 and wins the game. Find their respective probabilities of winning, if A starts first.

Let success (getting a 6) is denoted by S and the failure (not getting a 6) is denoted by F Hence, P(S) = 1/6 = p P(F) = 5/6 = q P(A wins in... View Article

In a hypertonic solution, a cell’s water pressure (A) Increases (B) First increases and then decreases (C) Decreases (D) Does not change

Decreases If a cell is placed in a hypertonic solution, the water will flow from inside the cell to outside. This will decrease the concentration... View Article

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