Question

6.
7] Ba
12] Zn
17] CO
State the valency in each case and name the following eleille
[The first two have been done for you]
1] K (Ans: Kl+ - potassium]
3) C1
4] Ni
4] CIO3
8] HCO3
9) NO2
13] Mg
14] O
18] MnO4
19] Li
20] I
23] ZnO2
24) SiO3
25) NO3
28] PO4
29] N
30] C
33] Ca
34] H
35] PbO2
38] Cr
39] HSO4
40] NHA
21 Cr2O, [Ans: Cr20-2- - dichromate]
6] CO3
10] Na
11] Br
15] Co
16] Cro4
21] OH
26] SO3
31] PO3
36] HSO3
22] 02
27] SO4
32] Al
37] A102
e] Pb
[The first one have been done for you]
a) Cu (Ans: Cul+ - Copper [I] i.e. cuprous; Cu2+ - Copper [II] i.e. cupric]
b] Ag c] Hg d] Fe
f] Sn g] Mn h] Pt i] Au
8.
State which of the following elements or radicals are divalent -
a] Lithium b) Nickel c]
f] Nitride
el
Ammonium d] Bromide Sulphite
g] Carbide h] Chromium i] Bisulphite j] Dichromate k] Permanganate
Explain the meaning of the term 'compound' with a suitable example. State the main characteristics &
compound with special reference to the compound iron (II) sulphide.
10. Name the elements in the compound & give the formula - of the following compounds:
a] Nitric acid b] Carbonic acid c) Phosphoric acid
d] Acetic acid
e] Blue vitriol f] Green vitriol Glauber's salth] Ethane i] Ethanol
9.
7. State the variable valencies of the following elements and give their name​

Answer 1

Answer:

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