Skema PAT T4 2011

Skema PAT T4 2011

TIPS UTK AKHIR TAHUN

1) AMMONIA, GLASS AND CERAMICS
2) ELEMENT IN A PERIOD
3) VOLTAIC CELL
4) SALT
5) EMPIRICAL FORMULA OF MAGNESIUM OXIDE, COPPER OXIDE
6) REACTIVITY OF GROUP 1
7) NAPHTALEIN
8) CONSTRUCT AN ELECTROCHEMICAL SERIES

GOOD LUCK...CHEMISTRY IS FUN

Selamat bercuti semua

Kepada pelajar2 Tingkatan 5ST2 jangan lupa kelas tambahan 1.6.2011.

Kelas tersebut akan bermula jam 8.00 pagi hingga 10.00 pagi.

Sila bawa Answer To Score dan Teknik menjawab soalan akan diadakan.

TIPS EXAM PERTENGAHAN TAHUN 2011

OBJEKTIF : SEMUA TOPIK 2-5

STRUCTURE : CHAPTER 2 (DIFFUSION, ELECTRON ARRRANGEMENT)

CHAPTER 3 (EMPIRICAL FORMULA, MOLECULAR FORMULA, FLOWER OF MOL,CHEMICAL FORMULA)

CHAPTER 4 (GROUP 1, PERIOD 3,

CHAPTER 5 (TYPE OF BOND,MOLTEN, SOLID, AQUEOUS, DRAW AN ELECTRON ARRANGEMENT)

ESSAY : CHAPTER 4 GROUP 1 AND 17,

CHAPTER 2 AND 5 ISOTOPE AND BOND

SCIENTIFIC SKILL : CHAPTER 4 (REACTIVITY OF THE GROUP)

Chapter 2 Form 4 Science

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sumber dipetik dr scrib

JAWAPAN PENILAIAN KURIKULUM 2011

Kimia

Form 5
Objective
1 A 2 B 3 A 4 C 5 B 6 B 7 A 8 C 9 A 10 B
11 C 12 B 13 C 14 C 15 C 16 C 17 D 18 A 19 A 20 B

1	(a)			Complete set of apparatus and can be used and label	2
	(b)			Zn + H2SO4 → ZnSO4 + H2	1
	(c)			Experiment I =   0.167 cm3 s-1 Experiment II =  0.267 cm3 s-1	1 1
	(d)			Number of moles of H2SO4 =  = 0.002 mol 1 mol of H2SO4 produce 1 mol of H2 0.002 mol of H2SO4 produce 0.002 mol of H2 Maximum volume of H2 = 0.002 x 24 000 = 48 cm3	1   1
	(e)			·         The rate of reaction in experiment II is higher than that of experiment I. ·         Copper(II) sulphate solution lowers the activation energy of the reaction in experiment II. ·         The frequency of effective collisions between hydrogen ions and zinc atoms increases in experiment II.	1 1   1
	3 (a) 1.      Oxidation - increase in oxidation number 2.      Reduction – decrease in oxidation number 1 1 (b)(i) 1.      Fe+2  →  Fe+3  +  e 2.      Br2  +  2e  →  2Br – 3.      Iron(II) ions lose electrons to become iron(III) ions. Iron(II) ions are oxidised 4.      Bromine molecules gain electrons to form bromide ions. Bromine molecules are reduced (a: any suitable reducing agent) 1.      Fe+3  +  e  →  Fe+2  2.      Zn  →  Zn+2  +  2e 3.      Iron(III) ions gain electrons to become iron(II) ions. Iron(III) ions are reduced 4.      Zinc atoms lose electrons to form zinc ions. Zinc atoms are oxidised (a: any suitable reducing agent) 1 1 1 1 1 1 1 1

My Isotopes

What is isotopes????



Ramai pelajar yang selalu memberikan jawapan yang tidak tepat tentang isotope. contohnya seperti berikut :

i)     Isotope have same proton number but different nucleon number 
       ( mempunyai nombor proton yang sama tetapi nombor nukleon yang berbeza )
ii)    Isotope have same proton number but different number of neutron
       ( mempunyai nombor proton yang sama tetapi nombor neutron yang berbeza )

Kenapa jawapan di atas tidak tepat ???? Macam dah betul tapi kenapa tak dapat markah.....

Kata kunci paling penting adalah ATOM...Kerana satu perkataan markah hilang.  Tersangatlah rugi.
So be careful. Inilah jawapan yang tepat...

Isotopes are atoms that have the same number of protons but different number of neutrons

or
atoms that have the same proton number but different nucleon number.

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sumber dipetik dari www.scribd.com/doc/26300399/Chapter-2-Form-5-Science.