Geofavor:

i didn't see this on time cos i didn't get the mention.

OluchiDelly:
Icecalm oya come assess!

OluchiDelly:


Good attempt but Check d ffl. No

3.valeric acid is pentanoic acid, so it's organic. Ans c.

11.washing soda is efflorescent - loses water of molecules to d atm. Ans A

12.B

14. Calcium hydroxide can be used for soap but on a small scale, cos KOH, NaOH are far better. But finds larger application in cement. I think it should be A.

16.D

17.B

19.A

These are the few ones I feel most contributors did not do justice to.

Afolabi6046:
17) 13.7 B 19) 2.7 A

DebbyChris:
1.true 2.No idea, pls which textbook are u using? i can't find that in my new school chemistry.
3.A 4.No idea 5.C 6.B 7.A 8.A 9.D 10.B 11.A 12.B 13.B 14.A 15.C 16.D 17.No idea 18.B 19.No idea 20.A

IamLukas:
1True2A3C4C5C6B7A8A9D10C
11A12B13B14A15C16A17B18B19C20D

Geofavor:

icecalm:
you can tender your questions tomorrow, i will respond to them.

DebbyChris:
Pls explain number 17 and 19.

Geofavor:
Cc
adebayour26
icecalm
kudderich
mathfero

dejt4u:

Dalton was wrong.. Matter can indeed be created and destroyed..

*discussion for another day

DrLazDevitan:


So I wasn't added?

*tears*

icecalm:

---

(1) Acidity is not an inherent property of a substance but rather a more behavior of a substance under certain conditions.
True/False

---

(2) Acid is defined as a substance which donates a proton by_______
(A) Bronsted-Lowry
(B) Arrhenius
(C) Lewis
(D) Non of above

---

(3) ________ is not an organic acid
(A) Propanoic acid
(B) Valeric acid
(C) Nitrous acid
(D) Lactic acid

---

(4) Acid in solution will dissociate to produce hydrogen ions or protons as the only positive ion, is of who?
(A) Lewis
(B) Alexander
(C) Arrhenius
(D) Millikan

---

(5) Strong acid is _____
(A) slippery to touch
(B) Coarse when rubbed between fingers
(C) Corrosive
(D) Orange in colour

---

(6) A substance that neutralize an acid to yield salt and water only is_____
(A) Alcohol
(B) Base
(C) Phenol
(D) Amide

---

(7) ______has a bitter taste.
(A) Base
(B) Acid
(C) Alkanoate
(D) A and B

---

(8.) A compound that could be use to dry all gases is_______
(A) Silica gel
(B) Calcium oxide
(C) Calcium chloride
(D) Concentrated tetraoxosulphate(VI) acid

---

(9) Calcium chloride may dry all gases except_______
(A) Hydrogen sulphide
(B) Acetylene
(C) Hydrogen chloride
(D) Ammonia

---

(10) Substance that absorb large amount of water on exposure to the atmosphere and eventually turn into solution is said to be _______
(A) Hygroscopic
(B) Deliquescent
(C) Efflorescent
(D) Florescent

---

(11) Washing soda is an example of _______ compounds
(A) Efflorescent
(B) Hygroscopic
(C) Deliquescent
(D) Effervescent

---

(12) _______ is a complex salt.
(A) KAl(SO₄) ₂
(B) K₄Fe(CN) ₆
(C) NaHSO₄
(D) Zn(OH)Cl

---

(13) Weak acid ionize______
(A) Completely
(B) Incompletely
(C) Strongly
(D) Explosively

---

(14) Calcium hydroxide is used in the manufacture of ______
(A) Cement
(B) Iron
(C) Explosive
(D) Soap

---

(15) ______ is used in the manufacture of gun powder and matches
(A) Silver trioxonitrate(V)
(B) Calcium tetraoxosulphate(VI)
(C) Potassium trioxonitrate(V)
(D) Copper II tetraoxosulphate(VI)

---

(16) Which of the following salts is insoluble in water?
(A) Silver trioxonitrate(V)
(B) Barium trioxonitrate(V)
(C) Calcium chloride
(D) Silver chloride

---

(17) The Ph of a 0.5M NaOH is ______
(A) 1.3
(B) 13.7
(C) 5.3
(D) 11.7

---

(18) Insoluble salts are mostly prepared by _______
(A) Neutralization
(B) Double decomposition
(C) Dilution
(D) Condensation

---

(19) The Ph of a 1.8×10^-3M HCl is
(A) 2.7
(B) 2.3
(C) 4.3
(D) 10.5

---

(20) The basicity of phosphoric acid is________
(A) 3
(B) 5
(C) 6
(D) 2

---

geoflavor, debbychris, OluchiDelly and others

Geofavor:
Cc Icecalm. prof pls explain, 12, 17 and 20. Thnx

Geofavor:
ATOMIC STRUCTURE & BONDING.

A). I) The concept of atoms, molecules and ions, the works of Dalton, Millikan, Rutherford, Moseley, Thompson and bhor.

II) Atomic structure, electron configuration, atomic number, mass number and isotopes; specific examples should be drawn from elements of atomic number 1 to 20.

III) Shapes of S and P orbitals

B). The periodic table and periodicity of elements, presentation of the periodic table with a view to recognizing families of elements. E.g. alkali metals, halogens, the Nobel gases and transition metals.
The variation of the following properties: ionization energy, ionic radii, electron affinity and electronegativity.

C) chemical bonding.
Electrovalency and covalency, the electron configuration of elements and their tendency to attain the noble gas structure. Hydrogen bonding and metallic bonding as special types of electrovalency and covalency respectively, coordinate bond as a type of covalent bond as illustrated by complexes like [Fe(CN)₆]³^-, [Fe(Cn)₆]⁴^-, [Cu(NH₃)₄]²^- and [Ag(NH₃) ₂⁺; van daar Waals' forces should be mentioned as a special type of bonding force.

D). Shapes of simple molecules: linear ((H2, O2, Cl2, HCl and CO2.), non-linear (H2O) and tetrahedral; (CH4) and pyramidal (NH3)

E) nuclear chemistry
(I)Radioactivity - types and properties of radiations
(II) nuclear reactions; simple equations, uses and applications of natural and artificial radioactivity.









Cc. Icecalm. There you have it. How's your health now - I hope you good? . And thanks for the explanation. What about the other numbers? - I didn't really understand oluchdelly. But thanx oluchi.

icecalm:
it's getting better. Thanks

Geofavor:

You're welcome. I hope it's not the duty you perform here that's causing it? .

So when will you be dropping the questions? I suggest next week Friday because the subtopics are much.

ATOMIC STRUCTURE & BONDING.

A). I) The concept of atoms, molecules and ions, the works of Dalton, Millikan, Rutherford, Moseley, Thompson and bhor.

II) Atomic structure, electron configuration, atomic number, mass number and isotopes; specific examples should be drawn from elements of atomic number 1 to 20.

III) Shapes of S and P orbitals

B). The periodic table and periodicity of elements, presentation of the periodic table with a view to recognizing families of elements. E.g. alkali metals, halogens, the Nobel gases and transition metals.
The variation of the following properties: ionization energy, ionic radii, electron affinity and electronegativity.

C) chemical bonding.
Electrovalency and covalency, the electron configuration of elements and their tendency to attain the noble gas structure. Hydrogen bonding and metallic bonding as special types of electrovalency and covalency respectively, coordinate bond as a type of covalent bond as illustrated by complexes like [Fe(CN)₆]³^-, [Fe(Cn)₆]⁴^-, [Cu(NH₃)₄]²^- and [Ag(NH₃) ₂⁺; van daar Waals' forces should be mentioned as a special type of bonding force.

D). Shapes of simple molecules: linear ((H2, O2, Cl2, HCl and CO2.), non-linear (H2O) and tetrahedral; (CH4) and pyramidal (NH3)

E) nuclear chemistry
(I)Radioactivity - types and properties of radiations
(II) nuclear reactions; simple equations, uses and applications of natural and artificial radioactivity.









Cc. Icecalm. There you have it. How's your health now - I hope you good? . And thanks for the explanation. What about the other numbers? - I didn't really understand oluchdelly. But thanx oluchi.