railway RRB ALP (CBT 1 + CBT 2 + CBAT) Mock Test Series 2025 (New) General Science Chemistry

ପାଟିର pH କେତେରୁ  କମ୍  ହେଲେ  ଦାନ୍ତ କ୍ଷୟ ଆରମ୍ଭ ହୁଏ:

1
 5.7
2
 5.5 
3
 5.6 
4
 5.4 
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