Phenolphthalein<span> is often used as an indicator in acid–base titrations. For this application, it </span>turns<span> colorless in acidic solutions and </span>pink<span> in basic solutions. </span>Phenolphthalein<span> is slightly soluble in water and usually is dissolved in alcohols for use in experiments.
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Answer:

Explanation:
Beta decay conserves the lepton number. In
decay, the atomic number of the element increases which is accompanied by the release of an electron antineutrino,
.
For example:-

The
decay of silicon-32 is shown below as:-

Answer: D
Explanation:
the atom of the metal loses one electron which becomes delocalised and is attragted by the positive nucleus leading to formation of metallic bond.
Answer:
1 Joule=0.2390057361 Calorie
789kj=789×0.2390057361×1000
=188575.5257829calorie
Explanation:
Hope u have understand
Answer: 2N2O3 -> 2N2 + 3O2
Explanation: