A uniform plank of Young’s modulus Y is moved over a smooth horizontal surface by a constant horizontal force F. The area of cross-section of the plank is A. The compressive strain on the plank […]
A liquid wets a solid completely. The meniscus of the liquid in a sufficiently long tube is
Options
(a) Flat (b) Concave (c) Convex (d) Cylindrical
Correct Answer:
Concave
Explanation:
Meniscus of liquid which […]
Use of hot air balloons in sports and for meteorological observations is an application of
Options
(a) Boyle’s law (b) Newton’s law (c) Kelvin’s law (d) Charle’s law
Correct Answer:
Charle’s law
Explanation: […]
The atmospheric pressure is sum of the
Options
(a) pressure of the biomolecules (b) vapour pressure of atmospheric constituents (c) vapour pressure of chemicals and vapour pressure of volatiles (d) pressure created on […]
Action of water or dilute mineral acids on metals can give
Options
(a) monohydrogen (b) tritium (c) dihydrogen (d) trihydrogen
Correct Answer:
dihydrogen
Explanation:
No explanation available. Be the first to write the […]
Time period of oscillation of a magnet is 2 sec. When it is remagnetised so that its pole strength is 4 times, its period will be
Options
(a) 4 sec (b) 2 sec […]
A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field. This observation established that bismuth is
ArH + N₂ + H₃PO₃ + HX are the products of the following reaction
Options
(a) ArNX + H₂ + H₂O (b) ArNX + H₃PO₄ + NaOH⁺ (c) ArN + H₃PO₂ + 2H₂ […]
As the alkaline earth metals (except Be) tend to lose their valence electrons readily they act as
Options
(a) weak oxidising agent (b) weak reducing agent (c) strong oxidising agent (d) strong reducing […]
The process used for the extraction of sodium is called
Options
(a) Serpeck’s process (b) Baeyer’s process (c) Down’s process (d) Thermite process
Correct Answer:
Down’s process
Explanation:
No explanation available. Be the […]
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