nursing AIIMS BSc Nursing 2025 Mock Test Series Chemistry d And f - Block Elements

ऑक्साइडों CrO, CrO3 और Cr2O3 को अम्लीय सामर्थ्य के घटते क्रम में व्यवस्थित करें

1
CrO3 > Cr2O3 > CrO
2
CrO3 > CrO > Cr2O3
3
CrO > Cr2O3 > CrO3
4
CrO > CrO3 > Cr2O3
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