Which reaction represents the process of neutralization?

1) mg + 2hcl > mgcl2 + h2
2) hcl + koh > kcl + h2o
3) pb(no3)2 + cacl2 > ca(no3)2 + pbcl2
4) 2kclo3 > 2kcl + 3o2

2)

Explanation:  When an acid reacts with the base then it undergoes neutralization to form a salt and water.

1) : is an example of single replacement reaction as Mg replaces hydrogen from its salt solution.

2) : is an example of neutralization where acid and base reacts to give salt and water.

3) :  is an example of double displacement reaction in which exchange of ions take place.

4) : is an example of decomposition where a single reactant decomposes to give two or more products.

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current