1)A solution said to be super saturated if
a)It can dissolve more solute at that temperature
b) It cannot dissolve more salute at that temperature
c) It contains more solute dissolved than in saturated solution at that temperature d) It's solubility is zero
2) 27 gm of saturated solution of NaCl at 20°C when evaporated to dryness leaves a solid residue of 7 gm. Calculate the solubility of NaCl at 20°C.
a) 25.92 b)35 c)28.57 d)285.7
3) The process of transformation of nitrogen to nitrates of ammonia is
a) Nitrogen fixation
b) Nitrification.
c)Ammonification.
d) Denitrification
4)When TanA=1
a) sinA-cosA=tanA
b)sinA-cosA=0
c)tanA=sinA
d)tanA=cosA
5)What is the difference between the arithmetic mean and geometric mean between 3 and 27 is
a)15
b)6
c) 12
d)0
6) If a+ib =0 then
a) a =0, bGO
b)aGO, bGO
c)a=0, b=0
d) All
