Description : Pick out the wrong statement. (A) Angle of repose of coal increases with its increasing size (B) Specific gravity of coal increases with its increasing maturity (C) Refractive index and reflectance of ... of coal decreases with increases in the volatile matter and decrease in the C/H ratio of coal
Last Answer : (D) Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H ratio of coal
Description : The intensive properties are (A) Molar volume, density, viscosity and boiling point (B) Refractive index and surface tension (C) Both (A) and (B) (D) None of these
Last Answer : (C) Both (A) and (B)
Description : Pick out the wrong statement. (A) Surface tension of a substance vanishes at critical point, as there is no distinction between liquid and vapour phases at its critical point (B) Entropy of ... is negative for exothermic reactions (D) The eccentric factor for all materials is always more than one
Last Answer : (D) The eccentric factor for all materials is always more than one
Description : Pick out the wrong statement. (A) Surface tension of a liquid is because of the difference in magnitude of adhesive & cohesive forces (B) A hydrometer used for the determination of ... Turbulent fluid flow is characterised by the rapid fluctuation of instantaneous pressure & velocity at a poin
Last Answer : (C) In case of unsteady fluid flow, the velocity at any given point does not change with time
Description : Describe Refractive Index property of solution. Explain its dependence on composition and temperature.
Last Answer : Refractive index: Refractive index of a medium is defines as the ratio of speed of light in vacuum to the speed of light in the medium. Refractive index = (speed of light in vacuum/ speed of ... decreases as the solution is denser and as a result of this refractive index of the solution decreases.
Description : Which of the following is an example of bulk property or general detector in HPLC A. Fluorescence detector B. Refractive index detector C. Electrochemical detector D. UV-Visible detector
Last Answer : Refractive index detector
Description : Which of the following is not an intensive property? (A) Chemical potential (B) Surface tension (C) Heat capacity (D) None of these
Last Answer : (C) Heat capacity
Description : Which of the following is an extensive property of a system? (A) Heat capacity (B) Molal heat capacity (C) Pressure (D) Concentration
Last Answer : A) Heat capacity
Description : Pick up the correct statement from the following: (A) The refractive index of a medium varies according to the wavelength of the radiation, (B) The variation of the refractive index with wave length, ... of white light by passing through a prism is caused due to dispersion (D) All of these
Last Answer : Answer: Option D
Description : The radii of curvature of each surface of a convex lens is `20 cm` and the refractive index of the material of the lens is `3//2` (i) Calculate its fo
Last Answer : The radii of curvature of each surface of a convex lens is `20 cm` and the refractive index of the ... What happens if the lens is cut along `CD` ?
Description : The focal length of a plano-convex lens is 20 cm in air. Refractive index of glass is 1.5. Calculate (i) the radius of curvature of lens surface and (
Last Answer : The focal length of a plano-convex lens is 20 cm in air. Refractive index of glass is 1.5. ... length when immersed in liquid of refractive index 1.6
Description : The focal length of a double convex lens is equal to radius of curvature of either surface. The refractive index of its material is
Last Answer : The focal length of a double convex lens is equal to radius of curvature of either surface. The refractive index of its material is
Description : A spherical convex surface separates object and image space of refractive index `1.0 and 4/3.` If radius of curvature of the surface is `10cm,` find i
Last Answer : A spherical convex surface separates object and image space of refractive index `1.0 and 4/3.` If ... of the surface is `10cm,` find its power.
Description : One end of a cylindrical rod is grounded to a hemispherical surface of radius`R=20mm`.It is immersed in water`(mu=4//3)`.If the refractive index of th
Last Answer : One end of a cylindrical rod is grounded to a hemispherical surface of radius`R=20mm`.It is immersed in water`(mu ... is ................(determine)
Description : A convex surface of radiys of curvature 20 cm separates air from glass of refractive index 1.5. Find the position and the nature of the image of a sma
Last Answer : A convex surface of radiys of curvature 20 cm separates air from glass of refractive index 1.5. Find ... at 50 cm in front of the convex surface.
Description : What is the refractive index of an ionospheric layer with 100x105 free electrons per m3 ? Assume frequency to be at 20 MHz. A. 0.99 B. 0.15 C. 0.78 D. 0.85
Last Answer : A. 0.99
Description : Ratio of the velocity of propagation of a light ray in free space to the velocity of propagation of a light ray in free space in a given material. ∙ A. refractive index ∙ B. standing wave ratio ∙ C. velocity factor ∙ D. propagation velocity
Last Answer : ∙ A. refractive index
Description : Which one of the following statements is correct ? a) For water at 100o Celsius at sea level, the vapour pressure is equal to atmospheric pressure b) Surface energy (or tension) is caused by ... it both in static and in dynamic conditions d) Air is 50,000 times more compressible than water
Last Answer : c) Viscosity of a fluid is the property exhibited by it both in static and in dynamic conditions
Description : Which is NOT an extensive property of thermodynamics? A. Density B. Mass C. Volume D. Energy
Last Answer : Density
Description : Pick up the correct statement from the following: (A) Plain cement concrete is equally strong in compression as well as in tension (B) Slump test is performed to check concrete strength (C ... D) Fineness modulus is the index number expressing the relative sizes of both coarse and fine aggregates
Last Answer : Option D
Description : Out of the following the refractive index is the highest for (A) Glass (B) Diamond (C) Brine (D) Kerosene
Last Answer : (B) Diamond
Description : Which of the following is an undesirable property of a manometricliquid? (A) Non-sticky & non-corrosive nature (B) High vapour pressure (C) Low viscosity & surface tension (D) Low co-efficient of thermal expansion
Last Answer : (B) High vapour pressure
Description : The fluid property which matters for falling rain drops to acquire spherical shape is its (A) Pressure (B) Height of descend (C) Viscosity (D) Surface tension
Last Answer : (D) Surface tension
Description : The fluid property, due to which, mercury does not wet the glass is (A) Surface tension (B) Viscosity (C) Cohesion (D) Adhesion
Last Answer : (A) Surface tension
Description : Property responsible for the talcum powder to cling to the skin is the (A) Capillary action (B) Adhesion (C) Cohesion (D) Surface tension
Last Answer : Option B
Description : Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its (A) Molecular weight (B) Aromatics content (C) Both ‘a’ & ‘b’ (D) Neither ‘a’ nor ‘b’
Last Answer : (C) Both ‘a’ & ‘b
Description : The type of high refractive index glass used in optical instruments is __________ glass. (A) Pyrex (B) Flint (C) Crookes (D) None of these
Last Answer : (B) Flint
Description : Which of the following has the highest value of refractive index? (A) Brine (sea water) (B) Diamond (C) Distilled water (D) Glass
Description : Entropy is a/an (A) State function (B) Macroscopic property (C) Extensive property (D) None of these
Last Answer : (D) None of these
Description : Chemical potential is a/an (A) Extensive property (B) Intensive property (C) Force which drives the chemical system to equilibrium (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : During accommodation: a. the distance between the lens and the ciliary body is decreased b. the tension in the suspensory ligament is increased c. the tension of the lens capsule is increased d. the refractive power of the lens is increased
Last Answer : the refractive power of the lens is increased
Description : Pick out the wrong statement: (A) The vacuum pressure is always the negative gauge pressure (B) The pressure of the liquid measured by a piezometer tube is the gauge pressure (C) Manometric ... point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Last Answer : (D) The point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Description : Pick out the wrong statement. (A) The form drag is dependent upon the occurrence of a wake (B) The shear stress at any given cross-section of a pipe for steady flow (either laminar or turbulent ... of viscosity (D) Existence of the boundary layer in fluid flow is because of viscosity of the fluid
Last Answer : (C) An ideal fluid is the one, which has negligible surface tension and obeys the Newton's law of viscosity
Description : Pick out the wrong statement. (A) Mechanical agitation is required, if the system has low interfacial tension (B) Sieve tray towers are generally used for systems having low ... Prandtl analogy for heat and mass transfer considers the transfer through both laminar and turbulent layers
Last Answer : (A) Mechanical agitation is required, if the system has low interfacial tension
Description : Which of the following properties of a fluid is responsible for offering resistance to shear? (A) Surface tension (B) Viscosity (C) Specific gravity (D) All (A), (B), and (C)
Last Answer : (B) Viscosity
Description : Extensive properties of a thermodynamic system depend upon the __________ of the system. (A) Specific volume (B) Temperature (C) Mass (D) Pressure
Last Answer : (C) Mass
Description : The extensive properties are (A) Volume, mass and number of moles (B) Free energy, entropy and enthalpy (C) Both (A) and (B) (D) None of these
Description : The energy of molecular motion appears as (a) heat (b) potential energy (c) surface tension (d) friction (e) increase in pressure.
Last Answer : Answer : a
Description : A ray of light starting from air passes through medium A of refractive index 1.50, enters medium B of refractive index 1.33 and finally enters medium C of refractive index 2.42. If this ray emerges out in air from C, then ... of media the bending of light least? (a) air-A (b) A-B (c) B-C (d) C-air
Last Answer : Answer : (b)
Description : Optical cable testers are used for ∙ a. Checking refractive index ∙ b. Light power out of a fiber ∙ c. Non-calibrated light into a fiber
Last Answer : b. Light power out of a fiber
Last Answer : ∙ b. Light power out of a fiber
Description : surface tension is an atomic/molecular property of -Science
Last Answer : answer:
Description : Soldering of two metals is possible because of the property of – (1) Viscosity (2) Osmosis (3) Cohesion (4) Surface tension
Last Answer : (3) Cohesion Explanation: Soldering is the process of joining two metals by the use of a solder alloy, and it is one of the oldest known joining techniques. It is possible because of the ... through-out the interior of substance. Soldering leads to alloy formation at the layer between two metals.
Description : 19. In the manufacturing of lead shots, the property of surface tension is utilised. A) Agree B) Disagree
Last Answer : A
Description : 18. The property of a liquid which enables it to resist tensile stress is called its surface tension. A) Agree B) Disagree
Description : Falling drops of water become spheres due to the property of (A) Surface tension of water (B) Compressibility of water (C) Capillarity of water (D) Viscosity of water
Last Answer : Answer: Option A
Description : The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called (A) Surface tension (B) Compressibility (C) Capillarity (D) Viscosity
Description : The mercury does not wet the glass. This is due to the property of the liquid known as (A) Cohesion (B) Adhesion (C) Viscosity (D) Surface tension
Description : Mercury does not wet glass. This is due to property of liquid known as (A) Adhesion (B) Cohesion (C) Surface tension (D) Viscosity
Last Answer : Answer: Option C