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Distinguish between unpolarized light and linearly polarized light
Concept: Plane Polarised Light
Explain two features to distinguish between the interference pattern in Young's double slit experiment with the diffraction pattern obtained due to a single slit.
Concept: Interference of Light Waves and Young’s Experiment
A monochromatic light of wavelength 500 nm is incident normally on a single slit of width 0.2 mm to produce a diffraction pattern. Find the angular width of the central maximum obtained on the screen.
Estimate the number of fringes obtained in Young's double slit experiment with fringe width 0.5 mm, which can be accommodated within the region of total angular spread of the central maximum due to single slit.
Concept: Interference of Light Waves and Young’s Experiment
Define the distance of closest approach. An α-particle of kinetic energy 'K' is bombarded on a thin gold foil. The distance of the closest approach is 'r'. What will be the distance of closest approach for an α-particle of double the kinetic energy?
Concept: Alpha-particle Scattering and Rutherford’s Nuclear Model of Atom
A radioactive nucleus 'A' undergoes a series of decays as given below:
The mass number and atomic number of A2 are 176 and 71 respectively. Determine the mass and atomic numbers of A4 and A.
Concept: Law of Radioactive Decay
Define the term 'amplitude modulation'
Concept: Amplitude Modulation (AM)
Explain any two factors which justify the need for modulating a low frequency base-band signal.
Concept: Amplitude Modulation (AM)
Name the greenhouse gases that contribute to global warming.
Concept: Greenhouse Effect and Climate Change
Mention the evolutionary significance of the Homo erectus
Concept: Evolution of Life Forms - a Theory
Name and explain the technique used for separating DNA fragments and making them available for biotechnology experiments.
Concept: Principles of Processes of Biotechnology
Write the role of ‘restriction sites’ in the cloning vector pBR322.
Concept: Tools of Recombinant DNA Technology >> Cloning Vectors
How many atoms constitute one unit cell of a face-centered cubic crystal?
Concept: Number of Atoms in a Unit Cell
What is the formula of a compound in which the element Y forms hcp lattice and atoms of X occupy 2/3rd of tetrahedral voids?
Concept: Close Packed Structures - Formula of a Compound and Number of Voids Filled
Why does a solution containing non-volatile solute have higher boiling point than the pure solvent ?
Concept: Vapour Pressure of Liquid >> Vapour Pressure of Liquid- Liquid Solutions
Why is elevation of boiling point a colligative property?
Concept: Colligative Properties and Determination of Molar Mass >> Elevation of Boiling Point
Calculate the freezing point of the solution when 31 g of ethylene glycol (C2H6O2) is dissolved in 500 g of water.
(Kf for water = 1.86 K kg mol–1)
Concept: Colligative Properties and Determination of Molar Mass >> Depression of Freezing Point
Define the following term: Primitive unit cells
Concept: Crystal Lattices and Unit Cells
Define the following term:
Ferromagnetism
Concept: Properties of Solids: Magnetic Properties
Henry’s law constant for CO2 in water is 1.67 × 108 Pa at 298 K. Calculate the quantity of CO2 in 500 mL of soda water when packed under 2.5 atm CO2 pressure at 298 K.
Concept: Solubility >> Solubility of a Gas in a Liquid
What happens if external potential applied becomes greater than E°cell of electrochemical cell?
Concept: Electrochemical Cells
