railway RRB Technician Grade 3 Mock Test 2024 General Science Chemistry

ତଳେ ଦିଆଯାଇଥିବା କେଉଁଟି ତାମ୍ର ଏବଂ ଜସ୍ତାର ଏକ ମିଶ୍ରଣ?

1
ସୋଲ୍ଡର
2
ପିତଳ
3
ଆଲନିକୋ
4
କାଂସ
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