Science IV Quiz

This one'll test you.............

31 Which of the following burn with a flame ? - chalk, phosphorus, magnesium, oil of vitriol, helium, carbon, methane, hydrogen, nitrogen, oxygen.

32 In what parts of the body are the following to be found ? - a) femur; b) tibia; c) clavicle; d) humerus; e) ulna; f) trachea; g) left ventricle; h) cerebellum; i) bicuspids; j) occiput.

33 Arrange the following metals in the order of their density:- silver, lithium, beryllium, platinum, iridium, lead, iron, copper, mercury, magnesium. (3pts for 7 correct, 2pts for getting the last three)

34 of what are the following the chemical formulae :
a) CO2
b) C6H6
c) C10H16O
d)C6H5OH
e)Fe3O4
f)NH3
g)H3PO4
h)H2S
i)HNO3
j)H2SO4

35 Arrange the following in the order of their size: comet, microbe, atom, sun, earth, proton, electron, filterable virus, shooting star, moon. (3pts for 7 correct, 2pts for getting the last three)

36 Of what metals are these the ores ? a)bauxite, b)haematite, c)galena, d)dolomite, e)cinnabar, f)pentlandite, g)argentite, h)casiterite, i)calamine, j)magnesite.

37 Which of the following are explosives ? DNB, guncotton, cordite, cannonite, TNT, lyddite, amatol, gelignite, glycerine, DNT.

38 Which of the following are poisonous gases ? - thermite, phosphorite, lewisite, kernite, TNT, dynamite, BBC, phosgene, OED, chlorine, DA, KKK, arsine, DB, CAP.

39 Arrange the following temperatures in order (coldest first): 3)temperature at North Pole; temperature of flame of Bunsen burner; 1)absolute zero; 5)temperature of human body; temperature of flame of oxyacetylene burner; temperature at which a body becomes red hot; white heat; 4)melting point of ice; 6)boiling point of water; 2)freezing point of alcohol. (2.5pts for 6 correct, 2.5pts for getting the last four)

No restrictions apply.
In general, points will be doubled to reflect the difficulty.
Good Luck ! You'll need it !

[Chunky Monkey]

34
a- carbon dioxide
b- benzene
c- alcohol & ketone
d- phenol
e- magnetite (black iron oxide powder)
f- ammonia
g- phosphoric acid
h- hydrogen sulfide
i- nitric acid
j- sulphuric acid

The Reaper showed hidden depths in his knowledge of Art, now he demonstrates a good grounding in science...............

All correct except for c) which is half correct, as your answer Alcohol and Ketone can be produced from Camphor which is the correct answer.
(It may be prepared by heating camphor with alcoholic potash - or by reducing camphor in alcoholic solution with sodium).
Although Camphor can be regarded as a ketone, only in its natural state does it match the formula - in general the formula for ketones would be R1(CO)R2.

Your answer e- magnetite (black iron oxide powder) is near enough to the more precise answer Ferroso-Ferric Oxide (Magnetic Iron Ore)

1 point for c) and 2pts for all the rest.

Leader:
[glow=red,2,300]BB Reaper 19pts[/glow]

[Chunky Monkey]

33)

lithium 0.53g/cm3
magnesium 1.74g/cm3
beryllium 1.85g/cm3
iron 7.87g/cm3
copper 9g/cm3
silver 10.5g/cm3
lead 11.342g/cm3
mercury 13.54g/cm3
platinum 21.4g/cm3
iridium 22.42g/cm3

BB Reaper is fast becoming a star pupil.

5 points were on offer for the correct order - which you have - and you have given all the densities correctly, so points are doubled.

It is interesting that the measured density of iridium is only slightly lower than that of osmium, which is often listed as the most dense element known. However, calculations produced from the space lattice show that the figure for iridium may be even higher at 22.65g/cm³ - which would make iridium the densest.

Leader:
[glow=red,2,300]BB Reaper 29pts[/glow]

[H&J]

a) femur - thigh ;
b) tibia - shin;
c) clavicle - Shoulder Blade;
d) humerus - upper arm ;
e) ulna - lower arm;
f) trachea - Throat;
g) left ventricle - Heart;
h) cerebellum - Brain;
i) bicuspids - mouth;
j) occiput - skull.

32. Some of these need a slight bit of qualification......
b) I think there's actually a long bone behind the shin which is actually the tibia.
h) and j) are at the back of the brain and the back of the skull, H & J !
i) bicuspids are the technical name for the teeth.

However, all ten vicinities are correct - so 10pts - and points are double for a,c,d,e,f & g

1. BB Reaper 29pts
2. H & J 16pts

[barbelman]

Hi Tommo

Some I know and some I guessed.......

31 phosphorus, magnesium, methane, hydrogen

35 electron, proton, atom, filterable virus, microbe(but could be the other side of virus) , shooting star, comet, moon, earth, sun (I think perhaps comets could be anywhere in the last four!)

36 a)bauxite = aluminium
b)haematite = iron
c)galena= lead
d)dolomite = dunno
e)cinnabar = mercury
f)pentlandite = dunno
g)argentite = silver
h)casiterite = dunno
i)calamine = zinc
j)magnesite = magnesium

37 DNB (dinitrobenzene?), guncotton, cordite, TNT (trinitrotoluene), lyddite (is that an old name for picric acid or trinitrophenol? - I had a nasty accident with once - nearly..), amatol, gelignite, DNT (dinitrotoluene?).


39 absolute zero;
freezing point of alcohol.
temperature at North Pole;
melting point of ice;
temperature of human body;
boiling point of water;
temperature of flame of Bunsen burner;
temperature at which a body becomes red hot;
temperature of flame of oxyacetylene burner;
white heat;

thanks
Tony (who is supposed to be a scientist!)

Wow ! This is going to be a difficult one to score.

31. Agree 100% with Magnesium, Methane and Hydrogen. (Carbon does too, though with more smoke than flame). Phosphorus is an interesting one, when ignited in air, after an initial show it burns purely with white smoke. However, I have to mark you correct, as when it burns in oxygen there is a flame, in accordance with the following chemical equation : 4P + 502 = 2P205 (which incidentally produces Phosphorus pentoxide.)
4pts earned.

35. I have electron and proton the other way round, but apart from that your answer is an exact match. 5pts as no doubt your scientific knowledge far exceeds mine !

36. All those nominated are correct, three 'dunno's' so that's 7pts.

37. Well done, only cannonite and glycerine from the list aren't explosives, and you have given me eight, so that's 8pts plus a bonus point each for the full names of DNB, TNT and DNT. Lyddite is indeed the old name for Picric Acid, Lyddite was developed in Lydd, Kent as a high explosive for shells in the Boer War and First World War. Another bonus point, thats 12pts for that one.

39. This must be the only 'bit of guesswork' to which you refer. You have the coldest six in perfect order, but the hottest four slightly out of order. 2.5pts so far.

30.5pts in all, which means that you've gone to the top of the class ! ;D

1. Barbelman 30.5pts
2. BB Reaper 29pts
3. H & J 16pts

tommo said:

35. I have electron and proton the other way round, but apart from that your answer is an exact match. 5pts as no doubt your scientific knowledge far exceeds mine !

In passing, I have received the following comment from Sav on the subject :

BTW, both answers could be correct regarding electrons. The electron can be considered as a particle or a charged cloud. Opinions are divided as they are too small to be seen. The proton is a bigger particle, but smaller than the charged area occupied by an electron.

I think that's worth a bonus 1.5pts to our leader !

1. Barbelman 30.5pts
2. BB Reaper 29pts
3. H & J 16pts
4. Sav 1.5pts

[Chunky Monkey]

36
F- pentlandite = Nickel
H- CASSITERITE = Tin

2 points to Young Scientist Of The Year the BB Reaper, who returns to the top of the class. ;)

Revised leaderboard:
1. BB Reaper 31pts
2. Barbelman 30.5pts
3. H & J 16pts
4. Sav 1.5pts

[Chunky Monkey]

36
d) dolomite = magnesium

Yes, Reaper, its another one of magnesium. Although magnesium is found in many minerals, only dolomite, magnesite, brucite, carnallite, and olivine are of commercial importance. Magnesium and other magnesium compounds are also produced from seawater, well and lake brines and bitterns.

Revised leaderboard:
1. BB Reaper 32pts
2. Barbelman 30.5pts
3. H & J 16pts
4. Sav 1.5pts

[barbelman]

Hi Tommo

38 lewisite, BBC, phosgene, chlorine, DA, arsine and CAP???

39 last four are
temperature at which a body becomes red hot;
temperature of flame of Bunsen burner;
white heat;
temperature of flame of oxyacetylene burner;

cheers
Tony

[Chunky Monkey]

Bugger well played tony think you have just picked me off. NNooooooooooooooooooooo :'( :'(

Never a truer word, Reaper, as Tony has indeed gobbled up all of the last 16.5 points on offer.
38. All 7 poisonous gases correctly identified, and points doubled on that one makes 14.

And for 39 there were alternative answers, the bunsen burner being placed 2nd or 3rd depending on which way you look at it.

So, to recap, here is the correct order with the temperatures:
i absolute zero; -273 degrees C
ii freezing point of alcohol; -114 deg. C
iii temperature at North Pole; -41 deg. C
iv melting point of ice; 0 deg. C
v temperature of human body; 37 deg. C
vi boiling point of water; 100 deg. C
vii temperature at which a body becomes red hot; 526 deg. C
viii temperature of flame of Bunsen burner; 1000 deg. C
ix white heat; 1300 deg. C
x temperature of flame of oxyacetylene burner 3000 deg. C

Now, the temperature for the bunsen is given above as 1000 deg C - but that is only for a yellow flame (which makes it like a candle) But turned up to full power (by opening the throat holes) to a ROARING FLAME it can reach 1800 deg C which would put it up to second.



Nonetheless, 2.5pts and end of this rather magnificent quiz.

Final results:
1. Barbelman, B.Sc, phD. 47pts
2. BB Reaper (young scientist, 2007) 32pts
3. H & J 16pts
4. Sav 1.5pts