NCERT Lab Manual XV — task. Science CBSE, Class 10.

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Answer the following questions:

1. The reaction between

$HC$ l and

$NaOH$ in its simplified version is

$H^+$ (aq) +

$OH^–$ (aq) →

$H_2O$ (l) can you assign a plausible explanation as to why the reaction should be exothermic?

Because of electrostatic attraction between $HCl$ and $NaOH$ , try to balance each other.
Because of atomic attraction between $HCl$ and $NaOH$ , try to balance each other.
Because of non-metallic attraction between $HCl$ and $NaOH$ , try to balance each other.
Because of ionic attraction between $HCl$ and $NaOH$ , try to balance each other.

2. Consider the changes;

$2Mg$ (s)+

$O_2$ (g) →

$2MgO$ (s). Which according to you is exothermic change?

Did you find an error?

91. NCERT Lab Manual XV