Which of the following statements is/are correct. (i) In 3d-series, all metals form ionic oxides "MO — NEET Chemistry Past Papers Chemistry Question

Question

Which of the following statements is/are correct. (i) In 3d-series, all metals form ionic oxides "MO" except Sc. (ii) Basic strength order of oxides of vanadium are V O > V O > V O . (iii) CrO is basic while Cr O is acidic in nature. (iv) Mn (VI) shows disproportionation to Mn (VII) & Mn (IV) in acidic medium. (A) (i) only (B) (ii), (iii) (C) (i), (ii) (D) (i), (ii), (iv) 2 3 2 4 2 5 2 3 (2) (ii), (iii) (3) (i), (ii) (4) (i), (ii), (iv) 2 3 2 4 2 5 2 3 Assertion : Geometrical isomerism is not possible in tetrahedral complex having two different unidentate ligands coordinated with central metal ion. Reason : Tetrahedral complexes do not show geometrical isomerism because the relative position of unidentate ligands attach to central metal atom are same w.r.t. each other. (1) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. (2) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion. (3) Assertion is true, Reason is false. (4) Assertion is false, Reason is true. Hypo solution reacts with AgBr to form which complex ion ? (1) [Ag(S O ) ] (2) [AgS O ] (3) [Ag (S O ) ] (4) [Ag S O ] 2 3 2 3– 2 3 –1 2 2 3 3 4– 2 2 3 2– (1) [Ag(S O ) ] (2) [AgS O ] (3) [Ag (S O ) ] (4) [Ag S O ] 2 3 2 3– 2 3 –1 2 2 3 3 4– 2 2 3 2– Dimethyl glyoxime is used for the test of ______ in alkaline medium. (1) Co (2) Zn (3) Mn (4) Ni +2 +2 +2 +2 (1) Co (2) Zn (3) Mn (4) Ni +2 +2 +2 +2 Rate of formation of SO in the following reaction 2SO + O → 2SO is 40 g min . Hence rate of disappearance of O is : (1) 32 g min (2) 8 g min (3) 20 g min (4) 16 g min 3 2 2 3 –1 2 –1 –1 –1 –1 2SO + O → 2SO (1) 32 g min (2) 8 g min (3) 20 g min (4) 16 g min 3 –1 2 2 2 3 –1 –1 –1 –1 1001CMD303029230166 FINAL SHOT - MOCK TEST-3