Teaching HTET PRT - Level 1 Mock Test Series 2024 General Science Chemistry Classification of Elements and Periodicity in Properties

खालीलपैकी कोणते पृथ्वीच्या कवचावरील सर्वात मुबलक मूलद्रव्य आहे?

1
सिलिकॉन
2
नायट्रोजन
3
ऑक्सिजन
4
कॅल्शियम
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