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which state of triply ionized Be+++ has the same orbital radius as that of the ground state of hydrogen?
if H+ concentration is decreased frm 1M to 10 raise to the power -4 at 25 degree c..for the couple MnO4-/Mn2+,then the oxidising power of theMnO4-/Mn2+ decreases by=?
a resistor of 10kohm has a tolerance of 10% and another of 20kohm has a tolerance of 2o%..the tolerance of series combination is nearly=?
10grm of bleachi powdr on reaction wid KI required 100 ml of 1N hypo.thus % of pure bleaching powder is-?
to neutralize 20ml of M/10 NaOH.the volume of M/20 HCl needed is=?
a and b r vander waals constt for gases...then Cl is easily liquified than ethane....Y so?
RS- is less basic but more nucleophilic than RO- bcoz =?
wat is cupellation?
sinA lies in first quadrant,cosB lies in 2nd quadrant,then in which quadrant does sin( A+B) lie?
a plank of negligible mass oscillates wid a body of mass m as governed by y=sinwt+undrroot3 coswt...the time at which the mass just loses cntact is=?
is it true that ferrous oxide is more basic than ferric oxide..if yes,wat r the possible reasns behind it?
two organ pipes closd at 1 end ,wen blown simultaneosly produce 4beats/s.length of shorter pipe 0.75.....length of other pipe=?
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