railway RRB Group D Mock Test Series 2024-25 General Science Chemistry Electrochemistry

'X' and 'Y' are elements which are highly reactive with air, hence stored in Kerosene. What could 'X' and 'Y' be?

1
Phosphorus and Sodium
2
Phosphorus and Sulphur
3
Sodium and Potassium
4
Sulphur and Potassium
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