How many moles of [H+] are there in 1dm3 of 0.5 solution of H2SO4
A. 2.0mole
B. 1.0mole
C. 0.5mole
D. 0.2mole
Which of the following substances is not a homogeneous mixture?
A. Filtered sea water
B. Soft drink
C. Flood water
D. Writing ink

According to the kinetic theory an absence in temperature causes the kinetic energy of particles to
A. decrease
B. increase
C. remain constant
D. be zero

Question 1

If 6logx 2 – 3logx 3 = 3log5 0.2, find x {UTME 2004}

A. 3/8 B. 3/4 C. 4/3 D. 8/3

Question 2

Assuming loge (4.4) = 1.4816 and loge (7.7) = 2.0142, the the value of loge (7/4) is {UTME 1978}

A. 0.5326 B. 3.4958 C. 0.4816 D. 0.0142 E. 1.3594

You can check for the hint to the answer on http://servantboy.com/2017/04/10/short-notes-and-solutions-on-indices-and-logarithm-for-utme/

Optimist1998:
How many moles of [H+] are there in 1dm3 of 0.5 solution of H2SO4
A. 2.0mole
B. 1.0mole
C. 0.5mole
D. 0.2mole

C

Which of the following substances is not a homogeneous mixture?
A. Filtered sea water
B. Soft drink
C. Flood water
D. Writing ink

C

According to the kinetic theory an absence in temperature causes the kinetic energy of particles to
A. decrease
B. increase
C. remain constant
D. be zero

C

Optimist1998:
Some chemistry questions........
The label on a reagent bottle containing a clear organic liquid dropped off.The liquid was neutral to litmus and gave a colourless gas with metallic sodium. The liquid must be an?
A. alkanoate
B. alkaene
C. alkanol
D. alkane

C sodium ethoxide

xH2SO4 + yAl(OH)3------>yH2O + zAl2(SO4)3.
The respective values of w, x, y and z in the equation above are
A. 2,2,5 and 1
B. 3,2,5and 2
C. 3,2,6 and 1
D. 2,2,6 and 2
B

How many lone pairs of electron are there on the central atom of the H2O molecules?
A. 1
B. 2
C. 3
D. 4

D

Optimist1998:
How many moles of [H+] are there in 1dm3 of 0.5 solution of H2SO4
A. 2.0mole
B. 1.0mole
C. 0.5mole
D. 0.2mole
Which of the following substances is not a homogeneous mixture?
A. Filtered sea water
B. Soft drink
C. Flood water
D. Writing ink

According to the kinetic theory an absence in temperature causes the kinetic energy of particles to
A. decrease
B. increase
C. remain constant
D. be zero

.
Sol=mass/molar mass x 1000/vol
2H+= 0.5x2=1
1=n x 1dm3/1dm3= 1 ans should be B
Second one C.... Third one should be D

Optimist1998:
Some chemistry questions........
The label on a reagent bottle containing a clear organic liquid dropped off.The liquid was neutral to litmus and gave a colourless gas with metallic sodium. The liquid must be an?
A. alkanoate
B. alkaene
C. alkanol
D. alkane

xH2SO4 + yAl(OH)3------>yH2O + zAl2(SO4)3.
The respective values of w, x, y and z in the equation above are
A. 2,2,5 and 1
B. 3,2,5and 2
C. 3,2,6 and 1
D. 2,2,6 and 2

How many lone pairs of electron are there on the central atom of the H2O molecules?
A. 1
B. 2
C. 3
D. 4

dunno the first,recheck the second n d third is D

pabostt:
Question 1

If 6logx 2 – 3logx 3 = 3log5 0.2, find x {UTME 2004}

A. 3/8 B. 3/4 C. 4/3 D. 8/3

Question 2

Assuming loge (4.4) = 1.4816 and loge (7.7) = 2.0142, the the value of loge (7/4) is {UTME 1978}

A. 0.5326 B. 3.4958 C. 0.4816 D. 0.0142 E. 1.3594

You can check for the hint to the answer on http://servantboy.com/2017/04/10/short-notes-and-solutions-on-indices-and-logarithm-for-utme/

question 2 z A

IemFava:
dunno the first,recheck the second n d third is D

The first one is C
2C2H5OH + 2Na >>>> 2C2H5ONA + H2.
H2 is d colourless gas

IemFava:
dunno the first,recheck the second n d third is D

.
I think d last is B 2 pairs

felix00:
.
I think d last is B 2 pairs

you are actually ryt,2 pairs (amounts to 4 electron)

Optimist1998:
Some chemistry questions........
The label on a reagent bottle containing a clear organic liquid dropped off.The liquid was neutral to litmus and gave a colourless gas with metallic sodium. The liquid must be an?
A. alkanoate
B. alkaene
C. alkanol
D. alkane

How many lone pairs of electron are there on the central atom of the H2O molecules?
A. 1
B. 2
C. 3
D. 4

The first I think it is D
the last one is B.

Please who have been able to do correction of name successfully in this year jamb. Pls urgent reply needed

itzeminent:
Please who have been able to do correction of name successfully in this year jamb. Pls urgent reply needed

How come they got ur name wrong,or didn't u check before submitting...abi u got married recently??

Nuel25846:

How come they got ur name wrong,or didn't u check before submitting...abi u got married recently??

d guy that did my jamb profile make d mistake... I wrote data for him and went to tutorial, I didn't login to cross check and I went to do my jamb registration, after gotten d slip I realized d error

itzeminent:
d guy that did my jamb profile make d mistake... I wrote data for him and went to tutorial, I didn't login to cross check and I went to do my jamb registration, after gotten d slip I realized d error

relax!... read and pass your exams. Jamb allows change of name/DOB/Course/institution. Only subject combo can't be changed!

felix00:
.
Sol=mass/molar mass x 1000/vol
2H+= 0.5x2=1
1=n x 1dm3/1dm3= 1 ans should be B
Second one C.... Third one should be D

Don't get it twisted; 1dm3 of 0.5 is thesame thing as 0.5Molar solution.
Formula for molar solution M= n/V
0.5=n/1
n=0.5

---

0.5M is simply 0.5 moles in 1000cm3 or 1dm3 solution.

xH2SO4 + yAl(OH)3------>yH2O + zAl2(SO4)3.
The respective values of w, x, y and z in the equation above are
A. 2,2,5 and 1
B. 3,2,5and 2
C. 3,2,6 and 1
D. 2,2,6 and 2

The answer to this C

According to the kinetic theory an absence in temperature causes the kinetic energy of particles to
A. decrease
B. increase
C. remain constant
D. be zero

No temperature; no energy
D looks more appropriate
Cc: Isaolamide

Physics
An aircraft travelled from calabar to kano as follows: it flew first to illorin converging a distance of 300km, 30° west of North, and then flew 400km, 60°East of North to kano. What is the resultant displacement?

I dug this up since it's still unanswered.
PS: The ans is 500km tho

Phyiscs:
The time rate of change of momentum is
A. impulse
B. force
C. power
D. pressure

A force of 100N was used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked
A. 32ms¹
B. 10ms²
C. 64ms¹
D. 100ms¹

trek07:


A

B

Chemistry:
««When sulphur (IV) oxide is passed into a solution of sodium hydroxide for a long time, it eventually produces a solution of
A. NaHSO4
B. Na2SO3
C. NaHSO3
D. Na2SO4
««What will happen if an aluminium spoon is used to stir a solution of iron (II) trioxonitrates (V)?
A. The spoon will be oxidized while the iron (II) ions will be reduced to the metal
B. The spoon will increase in size
C. The spoon will be reduced while the iron (II) ions will be oxidized
D. The spoon will be reduced
««In the purification of impure samples of ethyl ethanoate synthesized by esterification, concentrated sodium trioxocarbonate (IV) solution is used to remove
A. water
B. basic impurities
C. acidic impurities
D. ethoxyethane

Optimist1998:
Phyiscs:
The time rate of change of momentum is
A. impulse
B. force
C. power
D. pressure

A force of 100N was used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked
A. 32ms¹
B. 10ms²
C. 64ms¹
D. 100ms¹

B and D

Hello fellas. Please can a 15 year old candidate apply for unilag? ??

Hello, who can send me jamb past questions and answer PDF, sohmbernie@gmail.com

Optimist1998:
Don't get it twisted; 1dm3 of 0.5 is thesame thing as 0.5Molar solution. Formula for molar solution M= n/V 0.5=n/1 n=0.5

---

0.5M is simply 0.5 moles in 1000cm3 or 1dm3 solution.

. Am not convinced yet but I will let it slide

Optimist1998:
Chemistry:
««When sulphur (IV) oxide is passed into a solution of sodium hydroxide for a long time, it eventually produces a solution of
A. NaHSO4
B. Na2SO3
C. NaHSO3
D. Na2SO4
««What will happen if an aluminium spoon is used to stir a solution of iron (II) trioxonitrates (V)?
A. The spoon will be oxidized while the iron (II) ions will be reduced to the metal
B. The spoon will increase in size
C. The spoon will be reduced while the iron (II) ions will be oxidized
D. The spoon will be reduced
««In the purification of impure samples of ethyl ethanoate synthesized by esterification, concentrated sodium trioxocarbonate (IV) solution is used to remove
A. water
B. basic impurities
C. acidic impurities
D. ethoxyethane

.
First one is a bit tricky but should be B.....
second one is should be A and d last one is certainly C.
So2+2NaOH>>>>>>Na2so3 + H2O

This barca I support eh... Hmm

Optimist1998:
Don't get it twisted; 1dm3 of 0.5 is thesame thing as 0.5Molar solution. Formula for molar solution M= n/V 0.5=n/1 n=0.5

---

0.5M is simply 0.5 moles in 1000cm3 or 1dm3 solution.

. Maybe I shld modify this U said no of moles of H+. I.E H2S04>>>> 2H+ + SO4^2. n=0.5x2(2 mole of H+)= 1

Optimist1998:
Phyiscs:
The time rate of change of momentum is
A. impulse
B. force
C. power
D. pressure

A force of 100N was used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked
A. 32ms¹
B. 10ms²
C. 64ms¹
D. 100ms¹

.
First should be B I think...... F=mv-mu/t.
Time rate of change of momentum

felix00:
.
Am not convinced yet but I will let it slide

.
Maybe I shld modify this
U said no of moles of H+.
I.E H2S04>>>> 2H+ + SO4^2.
n=0.5x2(2 mole of H+)= 1

See my life! I didn't consider the mole ratio of Hydrogen
Sorry about the misinformation
You're correct don't mind me

felix00:
.
First one is a bit tricky but should be B.....
second one is should be A and d last one is certainly C.
So2+2NaOH>>>>>>Na2so3 + H2O

Lol
I thought of B at first but then ===>SO2 "for a long time" (that's in excess) it should give an acidic salt.

---

Past question chose B but I'm rooting for C

Optimist1998:

Lol
I thought of B at first but then ===>SO2 "for a long time" (that's in excess) it should give an acidic salt.

---

Past question chose B but I'm rooting for C

. I don't get.... Does for a 'long period of time' means so2 is in excess.... I think it means d final product.
Let me give u an example.... Like uhmm ethanol is passed into k2cr2o7 for a long period of time... Does dat means ethanol is in excess.. I don't think so