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electrovalent compounds are1 good conductor of electricity2 polar in nature3 low mp and low bp4 easily availableans polar in
ionic bonds are usually formed by combination of elements with which type of ionisation potential or electron
a girl throws a 01 kilogram ball at a wall the ball hits the wall perpendicularly with a velocity of 5 meters per second and then bounces
the main reaction during electrovalent bond formation is1 redox reaction2 substitution reaction 3 addition reaction4 elimination reactionans redox
a car is moving along a straight horizontal road at a speed of 20 meters per second the brakes are applied and a constant force of 5000 newtons
a ball falling vertically from rest for 3 seconds travels very nearlya 147 metersb 294 metersc 441 metersd 882 metersansa ball falling vertically
out of the following which compound will have electrovalent bonding 1
alpha particles are nuclei ofa hydrogenb heliumc oxygend nitrogenansalpha particles are nuclei of
the high melting point and insolubility in organic solvents of sulphanilic acid are due to its structure1 simple
which of the following halides has maximum melting point1 nacl 2
the idea that electrons revolved in orbits around the nucleus of an atom without radiating energy away from the atom was postulated bya thompsonb
which of the following is least soluble1 bef2
among the bonds formed by a chlorine atom with atoms of hydrogen chlorine sodium and carbon the strongest bond is formed between 1 h- cl
the half-life of an isotope of an element is 5 days the mass of a 10 gram sample of this isotope remaining after 20 days isa 0312 gramsb 0625 gramsc
normal 0 false false false en-in x-none x-none
an x-ray photon collides with a free electron and the photon is scattered during this collision there is conservation of a momentum but not energyb
when a metal becomes a superconductor there is a tremendous decrease in itsa total volumeb electrical resistancec lengthd densityanswhile a metal
the millikan experiment showed that electric charge wasa negativeb quantizedc positived immeasurableans the millikan experiment showed that electric
chemical formula for calcium pyrophosphate is ca2 p2o1 the formula for ferric pyrophosphate will be1
what metals combine with non-metals the metal atom tends to1 lose electrons 2 gain electrons 3 remain electrically neutral 4 none of
indicate the process of heat exchange that does not depend on temperature difference between human skin and enviroment a convection b
an ionic compound is generally a 1 good electrolyte2weak electrolyte3 non-electrolyte4 neutralans good
which of the following compound has electrovalent linkage1
which one of the following compound is ionic1 kcl
what is the nature of chemical bonding between cs and f1 covalent2 ionic3 coordinate4 metallicans