MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic Chemistryd and f Block elementsPotassium Dichromate

Chromyl chloride, CrO2Cl2, is prepared by heating a mixture of

A.NaCl, K2Cr2O7 and NaOH
B.NaCl, K2Cr2O7 and concentrated H2SO4✓ Correct
C.NaCl, K2Cr2O7 and MnO2
D.CrO3 and NaCl
Explanation

It is Chromyl chloride test 2 2 7 2 4 Concentrated 2 2 4 4 2 Chromyl Chloride (red vapours) K Cr O 4NaCl 6H SO 2CrO Cl 2KHSO 4NaHSO 3H O 85. Which is the correct statement about 2 2 7 Cr O structure? (a) It has neither Cr – Cr bonds nor O–O bonds (b) It has one Cr – Cr bond and six O – O bonds (c) It has no Cr – Cr bond and has six O – O bonds (d) It has one Cr – Cr bond and seven Cr – O bonds The dichromate ion 2 2 7 Cr O consists of two tetrahedral units sharing one corner Cr O Cr . Each chromium atom is bonded to three covalent oxygen atoms and one bridged atom. Thus dic

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