state gov Haryana Police Constable Mock Test 2024 General Science Chemistry Classification of Elements and Periodicity in Properties

कौन सा तत्व तांबे से अधिक अभिक्रियाशील नहीं है?

1
Ag 
2
Pb 
3
Fe
4
Zn
5
उत्तर नहीं देना चाहते
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