Atomic number of sodium is 11. Then the number of electrons in sodium ion is :
10
11
9
12
2 SO2 + O2 → :
2 SO4
2 SO3
SO4
2 SO
Match the following ?
a. Cl- - i. Poly atomic ion
b. Cr2+ - ii Mono atomic ion
c. NH4+ - iii. Mono atomic cation
d. PO43- - iv.Poly atomic cation
a.ii b.iii c.iv d.i
a.i b.ii c.iii d.iv
a.iii b.iv c.i d.ii
a.iv b.i c.ii d.iii
Valency of pottassium is 1. valency of chlorine is 1. Write the formula of pottassium chloride ?
KCl
K1Cl1
KCl-
2 KCl
Pick out the correct chemical formula of sodium nitrate ?
Na2CO3
NaNO3
2 NaCO3
Na2(CO3)2
In Au3+, 3 electrons are :
Gained
Lost
Stable
Exchanged
What are the charged particles formed by the transfer of electrons from one element to another element ?
Molecules
Atom
Ions
Metals
Among the following which is a monovalent poly atomic ion ?
HSO4-
ClO-
a and b
SO32-
Among the following identify the information which are not conveyed by chemical equations ?
Isotopes
Number of moles
Concentration
a and c
2 Fe + 3 Cl2 → 2 FeCl3 , Name the reactant ?
Fe and Cl2
FeCl3 and Cl
3 Cl and 2 Fe
None of the above
