engineering recuitment DRDO CEPTAM STA B Tier I (Sr. Technical Assistant) Mock Test 2022 General Science Chemistry

नीचे दिए गए जोड़े में से कौन सा सही मिलान है?

1
Al – उपधातु
2
Li – अधातु
3
Pt – उत्प्रेरक
4
Si - धातु
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