Q1 AMPLITUDE OF A WAVE REPRESENTED BY A=a/(a+b-c).the resonance ll occur wen
a)b=-c/2
b)b=0 n a=c
c)b=-a/2
d)none
Q2 radiations of intensity 0.5w/m2 are striking the metal surface .the pressure on metal plate is
a)0.166*10power(-8)n/m2
b)0.332 *10power(-8)
c)o.111*10 power(-8)
d)o.o83*10power(-8)
more cuming d way
1Q8 2,4 dichloro phenoxyacetic acid is used as
a)fungicide
b)insecticide
c)herbicide
d)moth repellent
Q9 which glass contains the highest %age of lead
A)na2so3
b)na2s2o3.5h2o
c)na2so4
d)na2s
1Q3 if n represents the order of a half period zone.area of ha;f period zone is approximately nm where m is equal to
a)zero
b)half
c)one
d)two
Q4which one of the following is the fastest drying agent for neutral gases?
a)phosphorus pentaoxide
b)active charcoal
c)anhydrous calcium chloride
d)na3po4
1it is part of radio and communication..google it
btw, do we have communication in bitsat?
1Q10 which acts as a photographer s fixer?
a)na2so3
b)na2s2o3.5h20
c)na2so4
d)na2s
Q11when radioactive materials like clevette,monozite,n pitchblende r heated to 1273 k in vacou the noble gas obtained is
a)rn b)kr
c)he
d)ne
1hypo ko explain kya kare .. this thing i learnt when i was in class 9
