Home
Class 12
CHEMISTRY
Which of the following statements is/are...

Which of the following statements is/are incorrect?
(a) Cassiterite is not the ore of tin
(b) Metallurgy is a process of mixing of ore
(c) concentration of chromite (`FeO.Cr_2O_3`) is done by magnetic separation
(d) ZnS with depressant NaCN forms `Na_2[Zn(CN)_4]`

A

(a) & (b)

B

Only (a)

C

(b), C & (d)

D

C and (d)

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • HYDROGEN

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION - D) (Assertion-Reason Type question)|15 Videos

  • MOCK TEST 1

    AAKASH INSTITUTE ENGLISH|Exercise EXAMPLE|28 Videos

Similar Questions

Explore conceptually related problems

Which of the following statement is/are incorrect for the complex [Cr(H_(2)O)_(6)]Cl_(3) ?

Which of the following statements is/are correct, when a mixture of NaCl and K_2Cr_2O_7 is gently warmed with concentrated H_2SO_4 ?

Which of the following statements is/are correct, when a mixture of NaCl and K_2Cr_2O_7 is gently warmed with concentrated H_2SO_4 ?

Which of the following statements is correct for complex [Cr(NH_(3))(CN)_(4)(NO)]^(2-) (given that n=1)?

Which of the following reactions is not involved in serpeck's process of leaching of Al_2O_3 from white bauxite ore ?

A Zn rod weighing 1.0g is taken in 100mL of 1M CuSO_(4) solution . After some time, [Cu^(2+)] in solution =0.9M( atomic weight of Zn=65.5g) . Which of the following statements is // are correct ? a. 0.655g of Zn was lost during the reaction. b. 0.327 g of Zn was lost during the reaction . c. There is no change in the molarity of SO_(4)^(2-) ion. d. There is a change in the molarity of SO_(4)^(2-) ion.

Which of the following statements is/are correct about the reaction. H_(2)SO_(4)+Cu_(3)P+Cr_(2)O_(7)^(2-)toCuSO_(4)+H_(3)PO_(4)+2Cr^(3+)

Which of the following ores can be concentrated by froth floatation method and why? Fe_2O_3, ZnS, Al_2O_3

Explain the role of the following: (a) NaCN in the separation of ZnS and PbS. (b) SiO_2 in the metallurgyof Cu containing Fe as impurity. (c) Iodine in the refining of Ti.

(a) Which of the following ores can be concentrated by froth floatation method and why? Fe_2O_3,ZnS,andAl_2O_3 (b) What is the role of silica in the metallurgy of Copper?

AAKASH INSTITUTE ENGLISH-M0ck test 26-EXAMPLE
  1. State true or false CuSO4.5H2O is blue in colour while CuSO4 is colo...

    Text Solution

    |

  2. Oxidation state of the metal in the minerals haematite and magnetite, ...

    Text Solution

    |

  3. Which of the following statements is/are incorrect? (a) Cassiterite is...

    Text Solution

    |

  4. Leaching of an ore is done by

    Text Solution

    |

  5. In the electrolytic reduction of pure Al2O3. Fluorspar (CaF2) is added...

    Text Solution

    |

  6. During the electroytic refining of zinc, which of the following statem...

    Text Solution

    |

  7. In Mac-Arthur Forrest Cyanide method, silver is extracted from the sol...

    Text Solution

    |

  8. In the extraction of copper, metal is formed in the Bessemer converter...

    Text Solution

    |

  9. In the extraction of iron in the blast furnace, phosphorous separates ...

    Text Solution

    |

  10. Which metal is used for making dry cell ?

    Text Solution

    |

  11. The conductivity of 0.10 M solution of KCl at 298 K is 0.025 S ...

    Text Solution

    |

  12. The process used in converting hydrated Alumina into anhydrous alumina...

    Text Solution

    |

  13. Hydrometallurgy method is used for the extraction of which of the foll...

    Text Solution

    |

  14. Which of the following forms of iron has highest melting point ?

    Text Solution

    |

  15. Consider the following reduction processes : (I) Fe2O3 + C rarr Fe ...

    Text Solution

    |

  16. Which of the following statement is incorrect regarding Ellingham diag...

    Text Solution

    |

  17. Which of the following statements is correct regarding the slag obtain...

    Text Solution

    |

  18. Consider the following metallurgical processes : (I) Electrolysis of...

    Text Solution

    |

  19. Which one of the following given d-block elements has the lowest atomi...

    Text Solution

    |

  20. Which of the following set has all the ions coloured ?

    Text Solution

    |