₦airaland Forum

oldfoolnigger:
the former....



congregation there is a collective noun(Notional Concord)

normally, collective noun goes with singular verb but in this case it performs action and for that, it attracts plural noun...

let break it down...

the congregation (that's the members) are dancing not is...



let me come and be going..

chufor:
Take a look

chufor:
But the book is saying the former is correct oh

ennydammy11:
yet no date yet no date

DRZAY:
CHEMISTRY 1. All the following will liberate a gas when reacted with dilute hydrochloric acid except a) Sodium tetraoxosulphate(VI) salt b) Sodium trioxocarbonate(IV) salt c) Sodium suiphide d) Sodium trioxonitrate(V) 2. The isomer of a compound C5H10 which does NOT decolorize bromine water is a) 2-methylbutane b) 2,2- dimethyipropane c) 2-methylbut- l-ene d) Methylcyclobutane 3. A mixture of nitrogen, oxygen and helium contains 0.25, 0.15 and 0.4 mole of these gases respectively. If the pressure contribution due to oxygen was 2.5 atm. The partial pressure of helium is a)4.0 atm b)0.8 atm c)3.33 atm d) 6.67 atm 175 4. Elements P has atomic number of 12 while element Q has an atomic number 15. Combination of P and Q gave a compound PmQn. the respective values of m and n are a) 2and2 c) 3and2 c 5. CHx9O2—6CO2+ 6H20 The hydrocarbon, CH in the reaction above is most likely a) Analkane b)abenzene c) analkene d)analkyne 6. A 5 12cm3 sample of a gas weighed 1.236g of 20°C and a pressure of one atmosphere. The reactive molecular mass of the gas is [R = 8.314kJk-1, I atm = 101,325Jm-3] a) 58.07 b) 588.367 c) 5.88 d) 197.9 7. The amount of methane molecules, Cl4 in 8.Ograms of methane is a) 8mol b) l28mol b) 2 and 3 ) 2 and 1 c) 0.Smol d) 3.01 x lO23mol 8. The concentration of a solution obtained by dissolving 0.53g of pure anhydrous Na2CO3 in water to make 250cm3 of solution. a) 2.0 x 10-5 mol dm-3 b) 2.lgdm-3 c) 2.0 x 10-2 mol dm-3 d) 5.0 x 10-3 mol dm-3 9. What is the maximum volume of CO2 at s.t.p. that can be obtained when dilute hydrochloric acid is added to 10grams of CaCO3? [Ca=40, C=12, 0 = 16] a) 2.24 dm3 b) 22.4 dm3 176 c) 0.224 dm3 d) 22.4dm3 10. Sulphur (IV) oxide travels a given distance in l0sec. How long will it take equal 1. All the following will liberate a gas when reacted with dilute hydrochloric acid except a) Sodium tetraoxosulphate(VI) salt b) Sodium trioxocarbonate(IV) salt c) Sodium suiphide d) Sodium trioxonitrate(V) 2. The isomer of a compound C5H10 which does NOT decolorize bromine water is a) 2-methylbutane b) 2,2- dimethyipropane c) 2-methylbut- l-ene d) Methylcyclobutane 3. A mixture of nitrogen, oxygen and helium contains 0.25, 0.15 and 0.4 mole of these gases respectively. If the pressure contribution due to oxygen was 2.5 atm. The partial pressure of helium is a)4.0 atm b)0.8 atm c)3.33 atm d) 6.67 atm 175 4. Elements P has atomic number of 12 while element Q has an atomic number 15. Combination of P and Q gave a compound PmQn. the respective values of m and n are a) 2and2 c) 3and2 c 5. CHx9O2—6CO2+ 6H20 The hydrocarbon, CH in the reaction above is most likely a) Analkane b)abenzene c) analkene d)analkyne 6. A 5 12cm3 sample of a gas weighed 1.236g of 20°C and a pressure of one atmosphere. The reactive molecular mass of the gas is [R = 8.314kJk-1, I atm = 101,325Jm-3] a) 58.07 b) 588.367 c) 5.88 d) 197.9 7. The amount of methane molecules, Cl4 in 8.Ograms of methane is a) 8mol b) l28mol b) 2 and 3 ) 2 and 1 c) 0.Smol d) 3.01 x lO23mol 8. The concentration of a solution obtained by dissolving 0.53g of pure anhydrous Na2CO3 in water to make 250cm3 of solution. a) 2.0 x 10-5 mol dm-3 b) 2.lgdm-3 c) 2.0 x 10-2 mol dm-3 d) 5.0 x 10-3 mol dm-3 9. What is the maximum volume of CO2 at s.t.p. that can be obtained when dilute hydrochloric acid is added to 10grams of CaCO3? [Ca=40, C=12, 0 = 16] a) 2.24 dm3 b) 22.4 dm3 176 c) 0.224 dm3 d) 22.4dm3 10. Sulphur (IV) oxide travels a given distance in l0sec. How long will it take equal volume of helium to travel the same distance under the same conditions? [S=32, O=16, He=4} a) 1.6sec b)40sec c) 5.Osec d) 2.Ssec 11. The volume of hydrogen gas produced at s.t.p. when 100cm of 2M hydrochloric acid reacts with excess zinc is a) 2.24dm3 b) 4.482.24dm3 c) 1.12dm3 d)4.8dm3 12. During electrolysis, two cells each containing molten A1203 and fuse CaCI2 were connected in series. A current of l5Amp was passed through the cells for a given period of time. At the end of the electrolysis 9g of calcium was found to have been deposited at the cathode what mass of aluminium would be deposited in the second cell [Al=27, Ca=40] a) 8.82g b) 4.44g c) 17.60g d) 4.05g 13. The balanced equation for the reaction of tin(ii) salt with potassium ptaoxodichromate(VI) in a acidic medium can be represented as eSn2 + fCr2O7 + gH+ → hSq+ iCr3+ + jH2 O e,f,g.h,i and j are respectively a) 3,5.6.3,land4 b) 3. 1. 14.3,2and7 c) 3,2,6,1,5and6 d) 5.2,1,5,3and2 177 14. The pH of a solution containing 0.5 x 10-6 M H2S04 is a) 6.3 b) 6.5 c) 6.0 d) 5.0 15. Which of the following oxides will NOT dissolve in both dilute hydrochloric acid and 2M sodium hydroxide solution? a) Lead (II) oxide b) Aluminium oxide c) Zinc(II) oxide d) Calcium oxide 16. The I.U.P.A.C. name for the compound is a) Pent-3-enoic acid b) Pent-4-enoic acid c) Pent-2-enoic acid d) Pent-3-ene-l-oic acid 17. Metal salts of long chain fatty acids are known as a) Detergents b) double salts c) soaps d) grease a) CHCOOH and CH3CH2CH2OH b) CH3COOH and CH3CH7CH3 c) CH3COOH and CH3CH2OHof oxidation of a) butan-3-ol b) butan-I-ol c) 3-methylpropan-2-ol d) Butan-2-ol 20. Which of the following structural formulas is NOT isomeric with the others? a) CH3CH2CH2CH2-OH b) CH3-O-CH2CH2CH3 The curve above represents the solubility curve of KCIO3. The number of moles of KCIO3 crystals produced by cooling 200cm3 of a saturated solution of the salt from 65°C to 25°C is 17 a) 6.30mole b) 3.26mole c) 0.63mole d) 7.3Omole 22. During a compression process involving an ideal gas at pressure P1, when the volume, V of the gas was halved, the temperature in Kelvin increases by half its initial value. The final pressure P2 is given by a) 3P1 b) 12P1 c) 6P1 d) 1.5P1 23. Cellulose and starch can be classified as one of the following: a) Hydrocarbons b) sugars e) carbohydrates d) alkaloids ANSWER KEY I. D 6. A 11. A 16. C 21. B 2. D 7. D 12. D 17. C 22. A 3. D 8. C 13. B 18. A 23. C 4. C 9. A 14. C 19. D 5. C 10.D 15.D 20.C

EngrBello:
No o...the metal ball discharged heats through air which is convection...
But the Sun reaches us through the 3 system.
°It reaches us through radiation by emitting some nuclear materials.e.g(infrared rays)
°It reaches us by conduction e.g through our house roofs
° It reaches us by convection too.....e.g before or during the rain.

Aybalance:
A guru correctly answers questions without reading them...consult maharaji for full definitions...

Jacktheripper:
Define a guru biko

Rursh:
Ohh Bros, you just know?

luvbro:
I purposely said that cus of the*iffa hear* u said it shows you don't want to learn

luvbro:
you can google it if you can't find it in your textbook

luvbro:
lol ignorance go and read your textbook very well.can someone pls help him out

luvbro:
lol ignorance go and read your textbook very well.can someone pls help him out

luvbro:
check the question again he said oxygen.oxygen is different from oxygen gas

Pes13:
21?

donblazer10:
#onecornerdance...I feel you bro

samuelizz:
Ma'am bawo
I no be female oh

samuelizz:
Resolving the tension vertically = Tcos30

since the body can't move vertically, the vertical component is at equilibrium.

Tcos30 = 20

T = 20/cos30

T = 20/(√3/2)

T = 40(√3/3)N.

oldfoolnigger:


expect ur exam dates on ur various mails any moment from now...

samuelizz:
Don't mind me jae

∆V is the increase in volume, V2 is the final volume

samuelizz:
cubic expansivity = 3 × Linear expansivity.

= 3 × 1.2 × 10-⁴ = 3.6 × 10-⁴k-¹

∆V = cubic expansivity × ∆T × V1

∆V => 3.6 × 10-⁴ × (80 - 30) × 8 × 10-³

∆V = 1.44 × 10-⁴m³

∆V = 0.000144m³

∆V = V2 - V1

V2 = 0.008 + 0.000144

V2 = 0.008144m³