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The ray which causes gas molecules to glow is
In which of the following material media would sound travel the fastest
The pitch of a sound note depends on
The electromagnetic wave that can produce a heating effect on the environment is
The thermometric substance of an absolute thermometer is
A cone in an unstable equilibrium has its potential energy
A wavelength of frequency of 2 Hz and a wavelengtg of 30cm. The velocity of the wave is
The principle of operation of an induction coil is based on
A certain radioactive source emits radiation that were found to be deflected by both magnetic and electric fields. The radiations are
The process of energy production in the sun is
Chemistry
Catalytic hdrogenation of oils results in the production of
The following alloys contain copper except
The metal extracted from cassiterite is
Compounds that have the same molecular formula but different structures are said to be
The component of air that can be removed by alkaline pyrogallol solution
Which of the following is used widely in the manufacture of flavors and perfumes
The use of diamond in abrasives is due to its
Which of the following metals is not extracted by electrolysis
Aluminium is extracted from
