Chemistry · Chemistry in Everyday Life
निम्नलिखित में से कौन पोर्टलैंड सीमेंट के आवश्यक घटक हैं?
- 1रेत, ग्राफीन, मिट्टी
- 2सिलिका, चूना, ग्रेफाइट पाउडर
- 3सिलिका, एलुमिना, चूना✓
- 4रेत, चूना, मिट्टी
सही उत्तर देखें
सिलिका, एलुमिना, चूना
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