RRB GROUP D EXAM 2022 Science Revision Questions set 1

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रेलवे भर्ती परीक्षा 2022

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Among the following, whose calorific value is the highest?/निम्नलिखित में से किसका कैलोरी मान सर्वाधिक होता है?

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Haematite is an ore/mineral of / हेमाटाइट……….. का एक अयस्क / खनिज है।

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