₦airaland Forum

topsonkay: 1. Which of the following noble gases is commonly found in the atmosphere? A.xenon B..neon C..helium D..argon
2.which of the allotrope of carbon is a constituent of a lead pencil? A. Graphite B. Diamond C. Lampblack D. Soot
3. The basicity of ethanoic acid is.. A. 1 B. 2 C.3 D. 4

D
A
A

Others should check their inbox, to know the veracity of this information.
I've checked mine, i didn't see anything.

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Study hard, that is all i have for you.
So far you follow the necessary guidelines while answering question, there is nothing big in CBT.
Wish you well.

buzyguy: Another attempt,Which of the follown is used to regenerate ethyne frm itz precipitate?a.CuSO4 B.NAOH c.AgNO3 D.H2SO4

D- H2So4

t.boy007:
nice clue but it's B argon.....

The answer should be Neon light.
They are used in aerodrome beacons as they have a high power of fog penetration.

Coelom is absent in the class of animal termed?
A.mollusca B.reptila C.arthropoda D.coelenterata

2. The most recently evolved structure in animals is the
A.hair B.cilium C.scale D.feather

buzyguy: As crozd with As cuz they are both carrierz,givz AA HEALTHY and NORMAL allele with 1/2 chanc,nd As healthy bt carrier allele with 1/2 chanc.so anza z A!

You have a point
cross between As and As should produce AA, As, As and Ss
AA- normal
As- carrier
ss-sickler
Hence the chance should be 1 out of 4= 1/4

buzyguy: oh! U made a mistak there,da object z upright or erect that mean virtual.so da image distnc shld b -3u

You are right, thanks for that
1/-3u + 1/u =1/15
-1+3/3u=1/15
3u=30
u=10cm

The homozygous condition Hbs Hbs results in sickle cell anaemia whereas HbA HbS has the sickling trait. What is the probability that a couple with the sickling trait will give birth to one normal child?
A. 1/2 b. 1/4 c.1/8 d. 0

ANDREW2EIC: Attempt this:

A certain far-sighted person cannot see objects that are closer to the eye than 50cm clearly. Determine the power of the converging lens which will enable him to see at 25cm.

v= -50cm
u= 25cm
1/-50 + 1/25 = 1/f
L.C.M= 50
-1+2/50 = 1/F
F= 50cm
since power= 1/F
power of the converging= 1/50cm
P= 0.02dioptre

ANDREW2EIC: Attempt this:

An image in a convex lens is upright and magnified 3 times. If the focal length of the lens is 15cm, what is the object distance?

v=3u
1/3u+ 1/u=1/15
1+3/3u=1/15
60=3u
u=20cm
object distance, u= 20cm

Johntosyne: no, dia wil stil b friction

aluminium nko?

Johntosyne: Which of d ff can b use to replace steel in a machine, nd also eliminaté friction in d machine? A. Iron B. Aluminium C. Carbon D. Nylon

A- since steel is an alloy of iron and carbon, with iron carring the largest percentage (99.5%)

t.boy007:
1)Which of there undergoes condensation reaction
a)alkanol
b)amine
c)alkanal
d)haloalkane
2)which of the following react with NaOH to give double salts?
a)S02
b)S03
c)P04
d)N02

1. A- In esterification reaction, acid and alkanols condenses to give a dimer with the elimination of water molecule.
2. D- Reaction between NO2 and NAOH will form NANO3 and NANO2

buzyguy: Do u bliev seriez sumtymz mak mistakez?dou am nt critisizing anywy!

Yes, as regard the question, i've checked four different series (series published by four different authors) they picked fish.

esunnex: Is ekiti state safe for riting jamb? AbÉg guyz reply

sure, but have zero tolerance for examination malpratice(s).
Do you know what i mean by that?

buzyguy: hmm,i thnk ovoviviparity z found amng reptilez

sure, check 1995 ume, question 50 (Biology)
positive criticism can not be ruled out.

Simplefemo: The F1 of a cross a tall and a dwarf plan was tall. The F1 was advanced to F2.
How many of 120F2 plant will be dwarf?
A. 30 B. 60 C. 90 D. 120

2. From which group of animals are mammals generally believed to have most recently evolved?
A. Reptile b. fishes c. amphibians d. birds

1. A (a cross between tall plant [TT] and dwarf plant [tt] will produce Tt, Tt, Tt, Tt in the 1st filial generation, if F1 is advanced to F2, Tt and Tt will result in plants with the following gene composition: TT,Tt, Tt, tt in the 2nd filial generation. 1 is dwarf out of 4, hence 30 will be dwarf in 120F2 generation.
2. B -oviparity- ovoviviparity- viviparity (as in bird to guppy (a fish) to mammal).

The F1 of a cross a tall and a dwarf plan was tall. The F1 was advanced to F2.
How many of 120F2 plant will be dwarf?
A. 30 B. 60 C. 90 D. 120

2. From which group of animals are mammals generally believed to have most recently evolved?
A. Reptile b. fishes c. amphibians d. birds

The major site of photosynthesis in the leaf is the
a. Palisade parenchyma
b. Mesophyll parenchyma
c. Upper epidermis
d. Lower epidermis

buzyguy: 1-D,2-A,3-C,4-C

2. why a, why not d
3. Work it for the benefit of others

Exponential increase in the population of an organism is a characteristic feature of
a. binary fission
b. sexual reproduction
c. budding
d. vegetative propagation

2. A fundamental similarity between nervous and hormonal system is that both
a. involve chemical transmission
b.have widespread effects
c.shed chemicals intothe blood stream
d.evoke rapid responses.

3. 5g of oven dried soil was heated in a furnace for 24 hours. After cooling, it weighed 4.8g. What is the amount of humus in the soil
a. 40.0g per 100g dry soil
b. 4.4g per 100g dry soil
c. 4.0g per 100g dry soil
d. 0.4g per 100g dry soil.

4. During cell division, the two strands of chromosomes are joined at a point called
a. Spindle
b. Chromatid
c. Centromere
d. Aster

t.boy007:
What is the composition of the alloy duraluminium.
a)al,cu,co,fe
b)al,mg,mn,fe
c)al,ni,c,di
d)al,Na,fe,zn

in a light spectrum,which colour has the highest speed?
a)green
b)red
c)blue
d)violet

1.B
2.B

Nemidav: Guy i'v a prob wiv diz question. . . . When taking a penalty kick,a footballer applies a force of 30.0N for a period of 0.05s.ifthe mass of the ball is 0.075kg,cal d speed with which the ball moves off.
A.4.50m/s b.11.25m/s c.20.00m/s d. 45.00 m/s

Newton 2nd law of motion, F=m(v-u)/t,
30=0.075*u/0.05
=20m/s (c)

edreesabiodun: Which of the following is insoluble in water a) ethanol b) HCl c) ether d) NH3. (2) which of the ffg will form a white precipitate with AgNO3 a) Butane b) ethene c) ethyne d) benzene 3)ethene will change the colour of KMnO4 from purple to what in an alkaline medium a)brown, b)yellow c)green d) reddish brown

1. C
2. C
3. C

buzyguy: Watz da funtn of da mixture of argon-nitrogen in filling lamp filament or bulb?a.prevents reductn by air b.prevents oxidatn by co2 c.prevents blackening d.prevents rustn of da filament

The answer is C- to prevent blackening

buzyguy: which of da follown experimnt makz use of alkaline pyrogalol? a.germinatn b.respiratn c.photosynthesis d.transpiratn

photosynthesis

Atesunate15: radiation can be detected by the ffling
i. Geiger muller tuber
ii.ratermater
iii.nuclear amalgamated ditector
iv.dekatron counter
v.crook's sprinthariscope
vi.galvanometer

all but iii and iv

All but iii and vi