₦airaland Forum

Tizzie: Lol,Boss ke?? I'm a girl abeg,about the Log thing I dunno any manual method,except 4-figure table or calc. If you know You can help.

It doesnt matter...a gal cn also be boss

Tizzie: PH=-log10(H+)
-log10(0.25)
=-(-0.6)
PH=+0.6
PH+POH=14
POH=14-0.6
POH=13.40 (B)

Nice one boss.
But remember you wont be able to press log on your jamb calculator...xo aw do we solve manually..

How many moles of limestone will be required to produce 5.6g of CaO?
A. 0.56
B. 0.10
C. 0.20
D. 1.12

The POH of a solution of 0.25moldm^-3 of HCl is?.
A.12.40
B.13.40
C.14.40
D.14.60

What current in ampere will deposit 20g of aluminium in 2 hours?....
A.32
B.8
C.4
D.16

Al =27, F=96500mol

Isryl02: cellulose is a polysacharride, other 3 are mono

Not all is monosaccharride..maltose is a dissacharride...

buzyguy: Itz lewis base,i wonda o

What will happen if u dissolve SO2 in water....u will definitely get an acidic solution....or have u seein base of non metals before the organic ones...Boss it was predicted as lewis acid......

buzyguy: 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.

Not at all boss.....its wat I read in an advance anatomy test book....duodenum z also part of it boss.

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....

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: 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

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

joseboy199: C,metallic bonding

Nice one boss

HOpe you guys are preparing for your exam...checking on you

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

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

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

joseboy199: MM of K2Cr2O7=39*2+52*2+16*7=78+104+112=294
MM OF 02 IN K2CR2O7=112
%O2=112/294*100
ANS=38.095

Nice boss

Whats the percentage composition of oxygen in K2Cr2O7?
Cr =52
k = 39
0 = 16

A.14.20
B.26.53
C.38.09
D.35.37

Where are the past questions nah......

joseboy199: C is d correct answer...

Right but xplain further.....

joseboy199: u ryt... a kind of mistake..it actualy,cl2,argon,o2,n2

Yes boss

Which of the following alters equilibrium position in a reaction
A.catalyst,temperature,pressure
B.temperature,surface area,catalyst
C.temperature,concentration, pressure
d.catalyst,surface area,pressure...

[quote author=t.boy007]Which of the following has effect on equilibrium costant?
a)pressure
b)temperature
c)concentration
d)catalyst
e)all of the above except catalyst[/quote]Hmmm...Only temperature has effect on equilibrium constant.......

joseboy199: u are correct cuz argon has d highest rmm...increasin rate of diffusion is argon,chlorine,oxygen and nitrogen

Nope..Chlorine is diatomic

[quote author=t.boy007]but you did not state may be it's chlorine atom=cl ore chlorine molecule=cl2 in the question[/quote]At a free or uncombined state, Chlorine, Oxygen, Nitrogen etc exist as diatomic...

[quote author=t.boy007]but argon has the highest RMM from the given option A-D.....well,may be you explain[/quote]Remember Chlorine is diatomic....Cl2
35.5 + 35.5 = 71

[quote author=t.boy007]but argon has the highest RMM from the given option A-D.....well,may be you explain[/quote]Remember Chlorine is diatomic....Cl2

[quote author=t.boy007]C
REASON: (COOH) from vegetable oil and (KOH) from plant ash extract,the reaction of there two compounds is known as saponification[/quote]nice...its the process used in production of soap...

joseboy199: Since u knw ur Q=it,ist get d Q 1st and den substitute it into d 4mular 2 get ur I...lemme solve it in anoda way
m=mrQ/nf,whr
m=mass
mr=molar mass
q=quantity of electricity
n=numba of mole
f=farday constant
0.16=63.5*Q/2*96500
makin q d subj of d 4mularQ=0.16*2*96500/63.5,,,Q=486.299...,i=486.299/900,,i=0.5A
note,copper ion wil lose 2 electron 2 bcome copper metal

Boss abeg no vex...used molar mass of cuso4 instead of jes cu.....E DON TEY NAH...tanx

[quote author=t.boy007]A
REASON:Rate of diffusion is inversely proportional to the relative molecular mass....i.e the more the relative molecula mass,the less its rate of diffusion...therefore from the question,argon has the highest RMM,it will definately have lesser rate of diffusion[/quote]hmmm your reasons are actually right but the answer is wrong...RANJU MO D OPTIONS WELLA....

Which of the following reactions take place between vegetable oil and plant ash extract

A..esterification
B..Neutralization
C..Saponification
D..Fermentation