According to the Arrhenius theory, a base reacts with an acid to produce...

According to the Arrhenius an acid and base react they form water and salt.

Explanation:

Neutralization reaction:

When an acid and base react they form water and salt.The reaction is called neutralization reaction.

According to the Arrhenius an acid is the substance which increase the H⁺ concentration, while base is the substance which increase the OH⁻ concentration.

General equation:

HX + BOH    →    BX   +  H₂O

From given reaction equations only option C is correct because only this reaction gives salt and water.

For example,

Chemical equation:

Ca(OH)₂ + H₂SO₄    →  CaSO₄ + 2H₂O

Calcium hydroxide is acting as a base. Sulfuric acid is an acid. Both these reactants react to form salt which is calcium sulfate and water.

Calcium hydroxide dissociate to gives Ca²⁺ ion and OH⁻ while H₂SO₄ dissociate to gives H⁺ and SO₄²⁻.  Ca²⁺  and SO₄²⁻ react to form salt CaSO₄  while OH⁻ and H⁺ form water.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.