che 12may
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Chapter 4
1. Sodium Na and Chloine Cl are both in Period 3 of Periodic Table. Explain which on eismore electronegatie and wh!.
". #luminium has an tomic radius of $.1"% nm and sulphur has an atomic radius of $.1$4
nm. &oth are in Period 3 of Periodic Table. Explain the difference in atomic radius.
3. Silicon boiling point' "3%% $C
Sulphur boiling point' 44% $C
Explain wh! both hae the mar(ed difference of boiling point.
4. )ie one example of amphoteric oxide.*h! is difference between amphoteric oxide compared to acidic+basic oxides,
%.
-on ormula Color
Permanganate-ron /--0
Copper /--0
Chromate
ichromate
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2. ill in the blan(
Name of process eaction Catal!st
aber process N"5 "667 "N3
"S8"5 8"667 "S83 9anadium oxide 9"8%
:anufacture of margarine !drogenation of margarine
8stwald process :anufacture of nitric acid
;. # student was gien an un(nown solution containing transition element. *hen he addsa
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Chapter %
1. )ie an example each for compound with ionic bond and coalent bond. raw the
structure.Explain wh! the boiling and melting points for the ionic compound is generall! higher.
".
Proton number Element
; >
1 ?
-. Predict the t!pe of compound formed between > and ?
--. )ie the formula.
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Chapter 2
1. # chemistr! student carries out an electrol!sis process using copper as electrode=
copper sulphate solution as electrol!te..-. Explain what would happen at anode and cathode= with explanation using half
e
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4. )ie the test for
#. 8x!gen gas&. Carbon dioxide gas
C. !drogen gas
%. )ie one adantage and one disaantage of lead6acid accumulator
2. Electrol!sis conerts AAAAAAAAAAAAAAA energ! to AAAAAAAAAAAAAAAA energ!.9oltaic cell conerts AAAAAAAAAAAAAAA energ! to AAAAAAAAAAAAAAAA energ!.
;. Consruct a oltaic cell using :g+Cu electrode. *rite the half e
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