Answer:
c
Explanation:
to reduce pressure on the reactants
Ni solution could be used to remove lead from lead (II) nitrate.
Explanation:
The removal of lead from lead nitrate will take place by displacement reaction.
In displacement reaction less reactive element is displaced by more reactive element form it compound.
The reactivity is decided by the placement of metal in the activity series.
A metal which is at higher position in the activity series will be able to displace the metal or element having lower position.
From the options given we will check their position in the activity series in comparison to Pb
Cu is lower in series than Pb hence cannot displace.
Hg is placed lower in the series than Pb hence cannot displace Pb.
Ag is placed lower than Pb in the series hence cannot displace Pb.
Ni is placed above the Pb in activity series hence can displace lead.
Answer:
1.)
2.) 
3.) 2HCl
4.) MgO
5.) Mg and 
6.) 
and
7.)Na and 
8.) 3 aluminums and 3 chlorides
Explanation:
OD IS THE ANSWER
JDBDBDBDBDBSBSBSHSHSBBSBSBSB
<span>Water is known to be the
universal solvent because it can mostly dissolve most of the substances. The
reason behind its solvability is the bonding of intermolecular forces of attraction.
The answer is letter B. Out of the many bondings between molecules, the bond
that governs water is H bonding or hydrogen bonding. Water is composed mostly
of two atoms of hydrogen one atom of oxygen. Both the hydrogen and oxygen are
polar elements and hydrogen is bounded with a high electronegativity oxygen atom.</span>
