The solubility in mol/dm3 of 20g of cuso4 dissolvin in 100cm3 of water at 180 degree celsius is..
A.0.25
B.0.13
C.1.25
D.2.00

Which of the following bonding does not involve formation of new compound....
A.dative
B.co-ordinate covalent bonding.
C.metallic bonding
D.covalent bonding

A particle contains 9 protons, 10 neutrons and 10 electrons is?
A.Positive ion
B.negative ion
C.neutral atom of a non metal
D.neutral atom of a metal

mayorall: The solubility in mol/dm3 of 20g of cuso4 dissolvin in 100cm3 of water at 180 degree celsius is..
A.0.25
B.0.13
C.1.25
D.2.00

Sol in mol/dm3=mass*1000/molar mass*volume
whr,m in gramms,v in dm3,1000 got in2 d 4mula cuz d volume is in cm3 and has b convertd 2 dm3,
sol in mol/dm3=20*1000/159.5*100
ans=1.25mol/dm3

mayorall: A particle contains 9 protons, 10 neutrons and 10 electrons is?
A.Positive ion
B.negative ion
C.neutral atom of a non metal
D.neutral atom of a metal

B,negative ion cuz d particle has gaind an electron

mayorall: Which of the following bonding does not involve formation of new compound....
A.dative
B.co-ordinate covalent bonding.
C.metallic bonding
D.covalent bonding

C,metallic bonding

Good job Mayorall, T.boy Buzyguy and others. Coming with some killer questions...

joseboy199:
C,metallic bonding

Nice one boss

edreesabiodun: Good job Mayorall, T.boy Buzyguy and others. Coming with some killer questions...

God will kill the devil in the question tru us Ijn....
Waitin

mayorall: The solubility in mol/dm3 of 20g of cuso4 dissolvin in 100cm3 of water at 180 degree celsius is..
A.0.25
B.0.13
C.1.25
D.2.00

ansa not dere.....lolz,option C z surely correct.
Mass of salt/molar mass*1000cm^3/volume of H2O
20/160*1000/100=1.25mol/dm^3

Obinnau: 1: B
2: A
3: A
4: am not sure abo ut dis but I tink A

c
a
d
b

Thks in advnce 4 brnging killer questnz,wich r gonna get rid of failure nd xam imbalance

edreesabiodun: Good job Mayorall, T.boy Buzyguy and others. Coming with some killer questions...

Thks in advnce 4 brnging killer questnz,wich r gonna get rid of failure nd xam imbalance.we r waitn...

edreesabiodun: Good job Mayorall, T.boy Buzyguy and others. Coming with some killer questions...

Hmm,vry correct.u may xplain hw if u cn!thks

Obinnau: the ansa is C

Valence shell electron pair theory through hybridizatn predict that sulphur(iv)oxide is?(a)bronted-lowry acid (b)lewis base (c)arrhenius acid (d)lewis acid

The orbitals dat overlapp in chlorine molecule are?a)s & p (b)p & p (c)s & s (d)none

When 70cm3 of 3.0mol/dm3 Na2CO3 is added to 30cm3 of 1.0 mol/dm3 of NaHCO3,the concentration of Na+ ions in mol/dm3 in solutn is, (a)1.5 (b)4.5 (c)2.5 (d)3.5

Which of da following organs is located at the RUQ of da abdomen? (a)stomach (b)liver (c)duodenum (d)appendix

Sister chromatids are: (a)two identical copies of a single chromosome produced during s-phase (b)pairs of chromosomes (c)points of attachments of centromeres to the chromosomes (d)chromosomes foumd in cells of sisters

A body of weight 50N in air displaces 3.7kg of water when partially immersed in it.The upthrust on the body is, (a)8.7N (b)13.0N (C)37.0N (d)87.0N

A force of 100N is used to push a body up a plane inclined at an angle 15deg to the horizontal.if one-half of the work done by the force is used in overcoming friction,the weight of the body in newtons is, (a)50/sin15deg. (b)50 sin15deg. (c)100/sin15deg. (d)100 sin15deg.

A lagged steel bar of length 50cm has its ends immersed in melting had and boiling water.the temperature at a point 20cm from the hot end is, (a)40degcelsius (b)50deg.celsius (c)60deg.celsius (d)80deg.celsius

buzyguy: A body of weight 50N in air displaces 3.7kg of water when partially immersed in it.The upthrust on the body is, (a)8.7N (b)13.0N (C)37.0N (d)87.0N

ans is c...upthrust is equal 2 d weight of object displace.
there.upthrust=3.7*10=37N

buzyguy: A lagged steel bar of length 50cm has its ends immersed in melting had and boiling water.the temperature at a point 20cm from the hot end is, (a)40degcelsius (b)50deg.celsius (c)60deg.celsius (d)80deg.celsius

Ans is A

buzyguy: Which of da following organs is located at the RUQ of da abdomen? (a)stomach (b)liver (c)duodenum (d)appendix

RUQ is right upper quadrant of the abdomen....Both liver and duodenum are there....bring in jamb-wise questions...This place is not for show off

buzyguy: Sister chromatids are: (a)two identical copies of a single chromosome produced during s-phase (b)pairs of chromosomes (c)points of attachments of centromeres to the chromosomes (d)chromosomes foumd in cells of sisters

Two identical copies of a chromatid joined together at d centromere..
We are preparing for jamb here bring in what will benefit the jambites not undergraduates...and ef you are also preparing for jamb...deres a word of advice for you..

buzyguy: Valence shell electron pair theory through hybridizatn predict that sulphur(iv)oxide is?(a)bronted-lowry acid (b)lewis base (c)arrhenius acid (d)lewis acid

Lewis acid....but its just a prediction not yet accepted due to some certain reasons....

Itz A nau,ar u confused wif the s-phase?

mayorall:

Two identical copies of a chromatid joined together at d centromere..
We are preparing for jamb here bring in what will benefit the jambites not undergraduates...and ef you are also preparing for jamb...deres a word of advice for you..

It may nt b included in jmb syllabus bt am teln u ds z a simple questn evn ssce studnt cn xplain vry wel.itz jxt to knw da parts where our organs fall.do u mean duodenum z located at the upper area of our abdomen?i thk itz part of da bowel,we r all here to learn.

mayorall:

RUQ is right upper quadrant of the abdomen....Both liver and duodenum are there....bring in jamb-wise questions...This place is not for show off

Itz lewis base,i wonda o

mayorall:

Lewis acid....but its just a prediction not yet accepted due to some certain reasons....

mayorall: Which of the following bonding does not involve formation of new compound....
A.dative
B.co-ordinate covalent bonding.
C.metallic bonding
D.covalent bonding

metallic bonding

Jamb nw adays is gettn crazy abt setting questns.am telling as far as itz stil biology jamb can extract their questns frm anyangle,chck out 4 chem. 2009 i neva taut jamb cld brng out such a questn then,reagent 4 testn alkanol wich z lucarz pls tel me,evn undagraduatez dnt knw ds quest,tak a luk at last yr chem. Dehydrogenase itz an advanc term of an enzyme,i agree wif u dat one hz to finish up wif basics nd av full undstnding afta den u gain more knwlegde datz wot brngs confidnce in xam hall.cheerz!

mayorall:

RUQ is right upper quadrant of the abdomen....Both liver and duodenum are there....bring in jamb-wise questions...This place is not for show off