 |
Topics |
Created On |
Clicks |
Correct |
Forum |
|
An ideal gas needs to follow which laws perfectly?
|
21 December 2005 |
2790 |
1739 |
 |
|
Tindak balas hidrolisis ialah...
|
03 January 2006 |
1700 |
536 |
 |
|
Plumbum(II) klorida larut dengan mudahnya dalam...
|
03 January 2006 |
1274 |
395 |
 |
|
Yang manakah antara berikut ialah pH larutan yang terhasil?
|
03 January 2006 |
878 |
338 |
 |
|
Larutan kalium tiosianat ditambah kepada larutan ferum(III) klorida...
|
03 January 2006 |
730 |
268 |
 |
|
Asid sulfurik cair dapat dibezakan daripada asid nitrik cair dengan...
|
03 January 2006 |
720 |
205 |
 |
|
Elektrolit yang digunakan dalam sel kering ialah...
|
03 January 2006 |
703 |
229 |
 |
|
Larutan natrium iodida pekat dielektrolisiskan dengan elektrod karbon
|
03 January 2006 |
580 |
219 |
 |
|
Antara berikut, yang manakah merupakan elektrolit?
|
03 January 2006 |
570 |
345 |
 |
|
Kekurangan nitrogen dalam tanah...
|
25 December 2005 |
469 |
250 |
 |
|
Gas etena dialirkan ke atas satu mangkin pada tekanan tinggi
|
25 December 2005 |
473 |
166 |
 |
|
Hablur natrium klorida terlarut dalam air kerana...
|
25 December 2005 |
404 |
116 |
 |
|
Memerlukan kuantiti gas klorin yang paling banyak
|
25 December 2005 |
367 |
153 |
 |
|
Peratus jisim oksigen dalam sebatian natrium karbonat kontang
|
23 December 2005 |
293 |
86 |
 |
|
Seketul pepejal kuprum(II) sulfat diletakkan dalam...
|
23 December 2005 |
270 |
180 |
 |
|
Sebatian ionik tidak mengkonduksi elektrik dalam keadaan pepejal
|
23 December 2005 |
284 |
165 |
 |
|
Menentukan formula empirik bagi magnesium oksida
|
23 December 2005 |
303 |
152 |
 |
|
Emulsions are...
|
21 December 2005 |
1105 |
540 |
 |
|
If you were to take a lump of coal...
|
21 December 2005 |
664 |
200 |
 |
|
Oxidation number of chromium in chromyl chloride
|
05 December 2005 |
493 |
179 |
 |
|
In a sodium chloride lattice...
|
05 December 2005 |
415 |
85 |
 |
|
Chemical bond in a carbon monoxide molecule
|
05 December 2005 |
431 |
104 |
 |
|
The rate-determining step in a chemical reaction
|
05 December 2005 |
312 |
60 |
 |
|
A gas sample contains 5g of neon and 16g of oxygen...
|
05 December 2005 |
200 |
76 |
 |
|
Kira kemolaran larutan baru yang terhasil.
|
02 December 2005 |
239 |
57 |
 |
|
Pepejal pada suhu bilik tetapi memejalwap apabila dipanaskan.
|
28 November 2005 |
288 |
133 |
 |
|
Mengapa naftalena harus dipanaskan dalam kukus air?
|
28 November 2005 |
356 |
186 |
 |
|
To prepare a solution of Pb2+ ions, we should use...
|
25 November 2005 |
5919 |
2034 |
 |
|
Synthetic polymers & Environmental pollution
|
25 November 2005 |
4199 |
2000 |
 |
|
Chemistry
|
25 November 2005 |
6957 |
5223 |
 |
|
Element X
|
25 November 2005 |
6270 |
3541 |
 |
|
Compound of sulphur & oxygen
|
25 November 2005 |
5030 |
2941 |
 |
|
Amphoteric oxide.
|
25 November 2005 |
4993 |
2382 |
 |
|
Does not form a chemical bond.
|
25 November 2005 |
4903 |
2358 |
 |
|
Electrochemical Series & Displacement Reaction
|
25 November 2005 |
4226 |
1376 |
 |
|
Hydrogen bromide
|
25 November 2005 |
3609 |
1431 |
 |
|
Copper(II) sulphate
|
25 November 2005 |
3915 |
819 |
 |
|
Fertiliser
|
25 November 2005 |
3107 |
635 |
 |
|
Water is added to methanol
|
26 November 2005 |
2472 |
1233 |
 |
|
Sodium carbonate is reacted with dilute sulphuric acid
|
26 November 2005 |
1977 |
944 |
 |
|
An element that can react violently with cold water.
|
26 November 2005 |
2183 |
1067 |
 |
|
Which pair of ions has the same electronic configurations?
|
26 November 2005 |
2007 |
569 |
 |
|
Electrolysis of an aqueous potassium bromide solution
|
26 November 2005 |
1948 |
691 |
 |
|
Mass of sodium hydroxide
|
26 November 2005 |
1425 |
843 |
 |
|
Determine the concentration of the lead(II) nitrate solution.
|
26 November 2005 |
1059 |
325 |
 |
|
Effects of pollution caused by sulphur dioxide gas
|
26 November 2005 |
1294 |
519 |
 |
|
Which metal is soft enough to be cut using a kitchen knife?
|
26 November 2005 |
1404 |
761 |
 |
|
Chemical X is an acid. Which of the following about X is FALSE?
|
25 November 2005 |
1367 |
838 |
 |
|
Which of the following is an electrolyte?
|
25 November 2005 |
1341 |
773 |
 |
|
Stability of noble gases
|
25 November 2005 |
1620 |
621 |
 |
|
Most unlikely to form a bromide
|
25 November 2005 |
1357 |
630 |
 |
|
Relative atomic mass
|
25 November 2005 |
1847 |
1248 |
 |
|
Potassium permanganate
|
25 November 2005 |
1427 |
839 |
 |
|
The following chemicals are natural products EXCEPT...
|
25 November 2005 |
1504 |
401 |
 |
|
Fluorescence
|
24 November 2005 |
157 |
60 |
 |
|
Characteristics of water
|
24 November 2005 |
256 |
122 |
 |
|
Same oxidation state in all of its compounds
|
24 November 2005 |
223 |
88 |
 |
|
Complex ions
|
24 November 2005 |
214 |
68 |
 |
|
Enthalpy change determined directly from experiment
|
24 November 2005 |
141 |
64 |
 |
|
NOT one of the possible stages in a chain reaction?
|
24 November 2005 |
145 |
45 |
 |
|
Which of the following enthalpy changes is always negative?
|
24 November 2005 |
138 |
45 |
 |
|
NOT a property of a catalyst?
|
24 November 2005 |
146 |
42 |
 |
|
The chemical equation represents a class of combustion
|
24 November 2005 |
163 |
95 |
 |
|
What is the rate when half of A had reacted?
|
24 November 2005 |
106 |
30 |
 |
|
Silver nitrate solution reacting with barium chloride solution.
|
24 November 2005 |
111 |
19 |
 |
|
Chemical compound that contains Zinc, Carbon & Oxygen
|
24 November 2005 |
134 |
101 |
 |
|
The relative molecular mass of the acid is...
|
24 November 2005 |
90 |
26 |
 |
|
The Gas Constant, R is in units of...
|
24 November 2005 |
88 |
22 |
 |
|
Simple molecules held together by weak Van der Waals forces
|
24 November 2005 |
121 |
50 |
 |
|
Method to separate dyes in a mixture
|
24 November 2005 |
104 |
40 |
 |
|
Graphite can be used as a lubricant
|
24 November 2005 |
98 |
35 |
 |
|
Which of the following gases has the most energy?
|
24 November 2005 |
111 |
33 |
 |
|
The first 6 ionisation energies of an element...
|
24 November 2005 |
77 |
25 |
 |
|
Which of the following compounds is the most ionic in character?
|
24 November 2005 |
100 |
26 |
 |
|
Reversible chemical reaction that is in dynamic equilibrium
|
24 November 2005 |
80 |
36 |
 |
|
Magnesium hydroxide is insoluble in sodium chloride because...
|
24 November 2005 |
73 |
27 |
 |
|
In chemistry, what is meant by an ideal solution?
|
24 November 2005 |
105 |
27 |
 |
|
The oxidation state of iron in K2FeO4 is...
|
24 November 2005 |
113 |
63 |
 |
|
The shape of a NH3 molecule?
|
08 September 2005 |
120 |
41 |
 |
|
The same type of bonding and shape?
|
08 September 2005 |
102 |
26 |
 |
|
Berikut adalah suatu persamaan ion:
|
31 July 2005 |
238 |
88 |
 |
|
Kira bilangan atom yang wujud dalam 1.7g ammonia
|
06 November 2005 |
202 |
43 |
 |
|
What is the chemical formula for the ore mineral of Galena?
|
30 August 2005 |
103 |
44 |
 |
|
Kumpulan berfungsi bagi cuka ialah...
|
13 September 2005 |
254 |
132 |
 |
|
Proses Haber menghasilkan ammona...
|
13 September 2005 |
257 |
151 |
 |
|
All aromatic hydrocarbons have at least one...
|
13 September 2005 |
91 |
48 |
 |
|
The saturated molecule is...
|
13 September 2005 |
95 |
60 |
 |
|
What is the correct IUPAC name for this organic molecule?
|
13 September 2005 |
101 |
57 |
 |
|
Choose the correct pairing...
|
13 September 2005 |
107 |
64 |
 |
|
Modern periodic table shows the following EXCEPT...
|
13 September 2005 |
1579 |
614 |
 |
|
Namakan sebatian alkana dengan formula kimia C7H16
|
12 September 2005 |
290 |
158 |
 |
|
Unsur-unsur berikut adalah halogen KECUALI...
|
12 September 2005 |
288 |
213 |
 |
|
Kumpulan berfungsi bagi alkohol ialah...
|
12 September 2005 |
290 |
173 |
 |
|
Jika 80cm3 NaOH diperlukan untuk meneutralkan 50cm3 H2SO4...
|
16 September 2005 |
183 |
70 |
 |
|
Alkohol berikut merupakan isomer kepada pentanol KECUALI...
|
16 September 2005 |
211 |
83 |
 |
|
Pilih kenyataan-kenyataan yang betul
|
16 September 2005 |
158 |
39 |
 |
|
Antara berikut yang manakah polimer semula jadi?
|
18 September 2005 |
179 |
100 |
 |
|
Pembuatan marjerin daripada minyak tumbuhan...
|
18 September 2005 |
253 |
128 |
 |
|
Yang manakah meneutralkan 20 cm3 natrium hidroksida 2.0 M ?
|
18 September 2005 |
123 |
48 |
 |
|
Pembakaran etena dalam oksigen berlebihan...
|
18 September 2005 |
119 |
31 |
 |
|
Yang manakah merupakan tindak balas redoks?
|
18 September 2005 |
148 |
79 |
 |
|
Asid pentanoik + Metanol --> Metil pentanoat + Air
|
18 September 2005 |
138 |
84 |
 |
|
Antara berikut, yang manakah ialah elektrolit?
|
18 September 2005 |
160 |
101 |
 |
|
Tindak balas yang boleh membezakan butana dengan butena
|
18 September 2005 |
133 |
51 |
 |
|
Bilangan atom yang sama dengan 1 mol karbon dioksida?
|
17 September 2005 |
101 |
26 |
 |
|
Asid lemak yang mempunyai takat lebur yang paling tinggi?
|
18 September 2005 |
145 |
39 |
 |
|
Sebatian terdiri daripada...
|
18 September 2005 |
135 |
107 |
 |
|
Pada takat akhir pentitratan...
|
18 September 2005 |
110 |
25 |
 |
|
Apakah kegunaan ester dalam kehidupan harian kita?
|
18 September 2005 |
438 |
93 |
 |
|
Apakah itu biodiesel?
|
18 September 2005 |
259 |
102 |
 |
|
Ammonia disediakan secara besar-besaran dengan proses haber...
|
23 September 2005 |
142 |
36 |
 |
|
Electrolysis of Copper(II) Chloride solution using copper electrodes
|
01 November 2005 |
1444 |
454 |
 |
|
When sodium carbonate was added to X, a gas was liberated...
|
01 November 2005 |
1251 |
320 |
 |
|
Which metal from the following is the most reactive?
|
01 October 2005 |
214 |
58 |
 |
|
To prepare barium sulphate, we can react...
|
01 November 2005 |
1185 |
424 |
 |
|
..... is a catalyst used in the Contact Process.
|
01 November 2005 |
1156 |
575 |
 |
|
Which of the following cells are NOT rechargeable?
|
01 November 2005 |
1058 |
488 |
 |
|
A mercury thermometer was accidentally broken...
|
01 November 2005 |
1106 |
515 |
 |
|
An inflated ballon will explode when it is placed in an oven...
|
01 November 2005 |
999 |
778 |
 |
|
The relative molecular mass of a metal oxide X2O3 is 102...
|
01 November 2005 |
961 |
547 |
 |
|
The following are properties of a transition element EXCEPT...
|
01 November 2005 |
980 |
368 |
 |
|
A metal phosphide compound has the formula X3P2...
|
01 November 2005 |
817 |
220 |
 |
|
The following statements about particles in a gas are TRUE EXCEPT...
|
30 October 2005 |
896 |
674 |
 |
|
Which of the following contains the most number of molecules?
|
30 October 2005 |
759 |
281 |
 |
|
The position of an element in the Periodic Table is determined by...
|
30 October 2005 |
950 |
399 |
 |
|
L is an element in Group 13 and M is an element in Group 17...
|
30 October 2005 |
864 |
484 |
 |
|
..... is NOT an electrolyte.
|
30 October 2005 |
905 |
454 |
 |
|
Hydrogen bromide gas is passed through trichloromethane...
|
30 October 2005 |
749 |
192 |
 |
|
..... can be prepared by double decomposition reaction
|
30 October 2005 |
710 |
257 |
 |
|
..... is made in industry using sulphuric acid.
|
30 October 2005 |
774 |
454 |
 |
|
..... is the chemical formula of marble.
|
30 October 2005 |
796 |
529 |
 |
|
All elements from Group 17 of the Periodic Table...
|
30 October 2005 |
952 |
221 |
 |
|
An atom of silicon heavier than an atom of nitrogen?
|
29 October 2005 |
762 |
584 |
 |
|
Isotopes of the same element have the same number of...
|
29 October 2005 |
942 |
701 |
 |
|
The following processes involve a chemical reaction EXCEPT...
|
29 October 2005 |
868 |
391 |
 |
|
Elements of Group 18 are chemically inert because...
|
29 October 2005 |
1005 |
532 |
 |
|
Which of the following substances is an ionic compound?
|
29 October 2005 |
929 |
525 |
 |
|
When electrolysis is used to purify a metal...
|
29 October 2005 |
804 |
469 |
 |
|
When extra water is added to aqueous ammonia...
|
29 October 2005 |
804 |
269 |
 |
|
The following salts are soluble in water EXCEPT...
|
29 October 2005 |
807 |
343 |
 |
|
..... is a polymer formed by using propene as the monomer.
|
29 October 2005 |
726 |
355 |
 |
|
The following statements are FALSE EXCEPT...
|
29 October 2005 |
715 |
352 |
 |
|
The following substances DO NOT contain atoms EXCEPT...
|
28 October 2005 |
756 |
233 |
 |
|
Metal E combines with oxygen to form a compound
|
28 October 2005 |
584 |
288 |
 |
|
This chemist arranged the elements in the Periodic Table...
|
28 October 2005 |
718 |
289 |
 |
|
The following compounds are NOT covalently bonded EXCEPT...
|
28 October 2005 |
726 |
359 |
 |
|
Electrolysis of a molten salt produces a brown vapour at the anode.
|
28 October 2005 |
773 |
357 |
 |
|
Dissociates completely in water to produce hydroxide ions
|
28 October 2005 |
717 |
399 |
 |
|
To differentiate aluminium chloride from zinc chloride
|
28 October 2005 |
755 |
236 |
 |
|
The following is FALSE about ammonia gas EXCEPT...
|
28 October 2005 |
777 |
285 |
 |
|
Handling corrosive chemicals in laboratory...
|
28 October 2005 |
831 |
497 |
 |
|
Usage of radioisotopes
|
28 October 2005 |
1743 |
972 |
 |
|
Kira bilangan mol ion sulfat yang dihasilkan
|
15 October 2005 |
101 |
35 |
 |
|
Apakah yang dimaksudkan dengan formula empirik?
|
20 October 2005 |
166 |
122 |
 |
|
Kadar penghasilan gas hidrogen
|
31 July 2005 |
252 |
129 |
 |
|
Elektrolit: molekul, ion & atom
|
31 July 2005 |
431 |
266 |
 |
|
Ion sulfida & Ion klorida
|
31 July 2005 |
400 |
172 |
 |
|
Implikasi jisim atom relatif sama
|
06 September 2005 |
329 |
129 |
 |
|
Ion hidroksida dalam larutan
|
26 August 2005 |
419 |
121 |
 |
|
Sel boleh dicas semula
|
26 August 2005 |
421 |
251 |
 |
|
Bahan yang mempercepatkan sesuatu tindak balas
|
24 August 2005 |
365 |
276 |
 |
|
Gas neutral
|
24 August 2005 |
347 |
214 |
 |
|
Sebatian ion dan kovalen
|
08 August 2005 |
656 |
436 |
 |
|
Tindak balas endotermik
|
31 July 2005 |
348 |
162 |
 |
|
Elektrokimia & Pengoksidaan
|
31 July 2005 |
389 |
170 |
 |
|
Persamaan metanol dan etanol
|
31 July 2005 |
354 |
219 |
 |
|
Asid lemah
|
31 July 2005 |
650 |
418 |
 |
|
Elektrolit
|
31 July 2005 |
410 |
262 |
 |
|
Gas butana & karbon dioksida
|
31 July 2005 |
396 |
193 |
 |
|
Formula am Alkana
|
28 July 2005 |
404 |
293 |
 |
|
Tindak balas logam dengan stim
|
27 July 2005 |
405 |
121 |
 |
|
Baja Kimia
|
27 July 2005 |
572 |
447 |
 |
|
Kelas makanan paling banyak nitrogen
|
27 July 2005 |
505 |
242 |
 |
|
Paraquat
|
27 July 2005 |
413 |
156 |
 |
|
Hormon insulin
|
27 July 2005 |
426 |
147 |
 |
|
Keperluan nitrogen oleh tumbuhan
|
27 July 2005 |
401 |
242 |
 |
|
Proses Haber
|
27 July 2005 |
593 |
378 |
 |
|
Pemanasan nitrat logam
|
27 July 2005 |
364 |
150 |
 |
|
Pemanasan protein dengan kapur soda
|
27 July 2005 |
324 |
110 |
 |
|
Karbon sebagai agen penurunan
|
27 July 2005 |
312 |
172 |
 |
|
Karat
|
27 July 2005 |
436 |
278 |
 |
|
Ion dinyahcas di anod ialah proses ...
|
27 July 2005 |
385 |
208 |
 |
|
Tindak balas redoks
|
27 July 2005 |
455 |
252 |
 |
|
Agen penurunan
|
27 July 2005 |
442 |
216 |
 |
|
Natrium bikarbonat
|
27 July 2005 |
458 |
192 |
 |
|
Aloi gangsa
|
27 July 2005 |
947 |
500 |
 |
|
Polimer dan monomer
|
27 July 2005 |
865 |
347 |
 |
|
Unsur utama dalam kaca ...
|
27 July 2005 |
785 |
584 |
 |
|
Peratus kandungan unsur dalam sebatian
|
27 July 2005 |
647 |
383 |
 |
|
Elektrolit sel kering
|
27 July 2005 |
1016 |
360 |
 |
|
Asid organik & Asid mineral
|
27 July 2005 |
749 |
415 |
 |
|
Asid dan Nilai pH
|
27 July 2005 |
792 |
319 |
 |
|
Nama lain unsur Kumpulan II
|
27 July 2005 |
716 |
374 |
 |
|
Nombor atom dan sifat kimia
|
27 July 2005 |
677 |
472 |
 |
|
Nombor atom
|
27 July 2005 |
657 |
414 |
 |
|
Valensi
|
27 July 2005 |
631 |
502 |
 |
|
Formula kimia
|
27 July 2005 |
789 |
516 |
 |
|
Elektrolit dan Logam pepejal
|
25 July 2005 |
718 |
427 |
 |
|
Persamaan Kimia
|
23 July 2005 |
510 |
200 |
 |
|
Tentukan nilai kuartil pertama
|
12 July 2005 |
759 |
604 |
 |
|
Hasil elektrolisis larutan Natrium Klorida pekat
|
11 July 2005 |
775 |
245 |
 |
|
Bagaimana atom natrium membentuk natrium klorida?
|
11 July 2005 |
609 |
305 |
 |
|
Memahami konsep pengoksidaan
|
11 July 2005 |
360 |
124 |
 |
|
Pembakaran lengkap pentena menghasilkan ...
|
11 July 2005 |
327 |
187 |
 |
|
Apa itu sebatian hidrokarbon?
|
11 July 2005 |
379 |
314 |
 |
|
Kesamaan ion klorin dengan ion kalsium
|
07 July 2005 |
557 |
210 |
 |
|
Hubungan sifat kimia unsur dengan nombor atomnya
|
07 July 2005 |
560 |
375 |
 |
|
Daya elektrostatik yang kuat di antara zarah-zarah
|
07 July 2005 |
530 |
286 |
 |
|
Hasil tindak balas peneutralan
|
06 July 2005 |
620 |
469 |
 |
|
Yang mana bukan asid kuat?
|
05 July 2005 |
619 |
281 |
 |
|
Hasil di katod apabila asid sulfurik cair dielektrolisiskan
|
05 July 2005 |
575 |
354 |
 |
|
Hasil elektrolisis (di anod) bagi larutan Kalium Iodida pekat
|
05 July 2005 |
655 |
340 |
 |
|
Perbezaan pengkonduksian elektrik sebatian ionik dan kovalen
|
05 July 2005 |
571 |
293 |
 |
|
Menulis konfigurasi elektron stabil bila nombor proton diketahui
|
05 July 2005 |
571 |
206 |
 |
|
Menulis konfigurasi elektron dari maklumat nombor proton
|
05 July 2005 |
551 |
414 |
 |
|
Ciri-ciri sebatian kovalen
|
04 July 2005 |
533 |
310 |
 |
|
Ciri-ciri sebatian ion
|
04 July 2005 |
489 |
299 |
 |
|
Nombor proton unsur dalam kala 3 Jadual Berkala
|
04 July 2005 |
502 |
359 |
 |
|
Ciri fizikal logam peralihan
|
04 July 2005 |
521 |
252 |
 |
|
Kenalpasti Kumpulan Jadual Berkala daripada cas ion unsur
|
04 July 2005 |
618 |
356 |
 |
|
Maklumat daripada Persamaan Kimia
|
04 July 2005 |
524 |
376 |
 |
|
Mengapa atom unsur Kumpulan 18 stabil?
|
04 July 2005 |
527 |
437 |
 |
|
Apakah cas suatu ion jika nombor proton atomnya diketahui?
|
04 July 2005 |
523 |
357 |
 |
|
Asal sebatian kovalen
|
04 July 2005 |
492 |
258 |
 |
|
Kesamaan di antara atom dan ionnya
|
04 July 2005 |
454 |
161 |
 |
|
Ciri atom bagi isotop suatu unsur
|
04 July 2005 |
475 |
281 |
 |
|
Faktor penentu sifat kimia unsur
|
04 July 2005 |
463 |
267 |
 |
|
Formula kimia Asid Sulfurik
|
01 July 2005 |
767 |
573 |
 |
|
Asid di dalam cuka
|
01 July 2005 |
604 |
224 |
 |
|
Unsur kimia terbanyak dalam alam semesta
|
01 July 2005 |
566 |
296 |
 |
|
Struktur molekul buckminsterfullerene
|
01 July 2005 |
448 |
271 |
 |
|
Struktur molekul grafit
|
01 July 2005 |
466 |
203 |
 |
|
Struktur molekul berlian
|
01 July 2005 |
429 |
342 |
 |
|
Nama ion yang bercas negatif
|
30 June 2005 |
470 |
277 |
 |
|
Nama ion yang bercas positif
|
30 June 2005 |
485 |
381 |
 |
|
Apakah nama kimia air?
|
30 June 2005 |
602 |
206 |
 |
|
Membezakan sebatian daripada unsur
|
29 June 2005 |
470 |
302 |
 |
|
Bilangan proton, neutron dan elektron Klorin daripada simbol kimia
|
29 June 2005 |
518 |
300 |
 |
|
Mengenalpasti Unsur Peralihan
|
29 June 2005 |
643 |
335 |
 |
|
Satu ciri sepunya sebatian organik
|
29 June 2005 |
356 |
148 |
 |
|
Mengenalpasti sebatian tak organik
|
29 June 2005 |
395 |
153 |
 |
|
Kesan pembakaran etena ke atas karbon
|
29 June 2005 |
413 |
242 |
 |
|
Mengenalpasti proses pengoksidaan
|
29 June 2005 |
850 |
424 |
 |