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Which of the following statement (s) is ...

Which of the following statement (s) is /are correct?
(I) CuS is white in colour.
(II) `KMnO_(4) ` exists as dark purple black prismatic crystals.
(III) Basic copper carbonate is `CuCO_(3).Cu(OH)_(2)`.
(IV) On strong heating, potassium dicheomate decomposes with evolution of oxygen.
Choose the correct option.

A

I,II and III

B

II,III and IV

C

I,Iii,and IV

D

I,II,III and IV

Text Solution

Verified by Experts

The correct Answer is:
B
CuS is not white in colour. It is blue colour.
• `KMnO_(4)` exists as dark purple black prismatic crystals.
• Basic copper carbonate is `CuCO_(3). Cu(OH)_(2)` • On strong heating, potassium dichromate decomposes with evolution of oxygen.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-D - AND F-BLOCK ELEMENTS-Exercise 2 (Miscellaneous Problems)
  1. Match the properties given in Column I with the metals given in Column...

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  2. The ion Cr^(2+) is redusing agent while that of Mn^(3+) is an oxidisin...

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  3. Which of the following statement (s) is /are correct? (I) CuS is wh...

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  4. Cuprous ion is colourless, while cupric ion is colured because

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  5. The oxidation number of Mn in the product of alkaline oxidative fusion...

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  6. The 3d-metal ion are generally paramagnetic in nature because

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  7. the caculated magnetic moment of a divalent ion of an atomic number 2...

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  8. Four successive members of the first row transition elements are liste...

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  9. Among the following series of transition metal ions, the one in which ...

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  10. The colourless species is

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  11. Amongst the following, the lowest degree of paramgnetism per mole of t...

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  12. Which do not decolourise KMnO(4) in aqueous solution?

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  13. Potassium permaganate acts as oxidant in alkaline and acidic media. Th...

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  14. A certain metal will liberate hydrogen from dilute acids. It will reac...

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  15. Cu^(2+) has a stronger polarising power than that of Ca^(2+) because

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  16. On addition of AgNO(3) to four different test tubes containing differe...

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  17. Which of the following compounds will show magnetic moment of 1.72 BM...

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  18. Which of the following statement (s) is /are correct? (I) In acidic ...

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  19. Which of the following paires have same radii?

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  20. Zn gives H(2) gas with H(2)SO(4) and HCl but not with HNO(3) because

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