Home
Class 12
CHEMISTRY
(A) Mn & Hg exist in simple crystal stru...

(A) Mn & Hg exist in simple crystal structures.
(R) Both Mn & Hg are solids.

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

Verified by Experts

The correct Answer is:
D
Both (A) and (R) are false
Promotional Banner

Topper's Solved these Questions

  • D-BLOCK ELEMENTS

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE-3 (PREVIOUS NEET/AIPMT QUESTIONS)|43 Videos

  • D - BLOCK ELEMENTS

    AAKASH SERIES|Exercise PRACTICE EXERCISE|50 Videos

  • DILUTE SOLUTIONS

    AAKASH SERIES|Exercise EXERCISE - 1.2|55 Videos

Similar Questions

Explore conceptually related problems

(A) Diamond and graphite do not have same crystal structure. (R) Diamond is crystalline while graphite is amorphous

A metallic element exists in simple cubic structure. Each edge length of the unit cell is 3A^(0) . The density of metal is 10 gm cm. How many unit cells will be there in 16.2 gm of the metal?

(A) : In many crystal structures of ionic substances cations occupy the voids created byanions. (R) : Cations are smaller than anions.

(A) In natural rubber, the polyisoprene chains exist as coiled structure. (R) In polyisoprene Cis-configured chains are held together by weak Vander waals interactions.

Which of the following exists as covalent crystals in the solid state :

(A) Mn atom loses ns electrons first during ionization as compared to (n-l)d electrons . (R) The effective nuclear charge experienced by (n-l)d electrons is greater than that by ns electrons.

(A) 369 K is considered as transition temperature of sulphur (R ) At 369 K both alpha and beta sulphur are exist in equilibrium

The following are some statments about HNO_2 i) It undissociated forms are tautomers ii) It's undissociated forms are resonance structures iii) Its anhydride in pure state exists as plane blue solid and that melts to deep blue liquid The correct combination is

Assertion (A) : Salt crystal is not solid Reason (R) : Shape of the salt crystals is depending on the shape of the container.

AAKASH SERIES-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-4 (ASSERTION (A) & REASON (R) TYPE QUESTIONS )
  1. (A) E^(@) for Mn^(+3)//Mn^(+2) is more positive than Cr^(3+)//Cr^(+2) ...

    Text Solution

    |

  2. (A) K2Cr2O7 is used as primary standard in volumetric analysis. (R) ...

    Text Solution

    |

  3. (A) Solution of Na2CrO4 in water is intensely coloured. (R) Oxidatio...

    Text Solution

    |

  4. (A) Elements of 4f sries are called Lanthanides (R) Lanthanum Belong...

    Text Solution

    |

  5. (A) Silver. Gold and platinum are precious metals. (R) Silver glod a...

    Text Solution

    |

  6. (A) Zn,Cd^(-) and Hg of group 12 are transition metals (R) Partiall...

    Text Solution

    |

  7. (A) Mn & Hg exist in simple crystal structures. (R) Both Mn & Hg are...

    Text Solution

    |

  8. (A) Metals of 4d and 5d series have greater enthalpies of atomization ...

    Text Solution

    |

  9. (A) The enthalpy of atomization of zinc is the highest in 3d series. ...

    Text Solution

    |

  10. (A) Second ionization enthalpies of Cr and Cn are very low (R) Both ...

    Text Solution

    |

  11. (A) The calculated spin only magnetic moment of Ti^(+2) is 1.73 BM. ...

    Text Solution

    |

  12. (A) Ni^(+2) salts are pink in colour (R) Ni^(+2) absorb light in IR ...

    Text Solution

    |

  13. (A) Cu^(+) is highly stable in aqueous solution (R) E.C of Cu^(+) is...

    Text Solution

    |

  14. (A) Chromates and dichromates are not interconvertible in aqueous solu...

    Text Solution

    |

  15. (A) Cu has a unique behavior having a positive SRP. (R) Cu is unabl...

    Text Solution

    |

  16. (A) Although fluorine is more electronega-tiye than oxygen, but the ab...

    Text Solution

    |

  17. (A) Cr^(2+) is reducing while Mn^(3+) is oxidizing when both have d^4 ...

    Text Solution

    |

  18. (A) Cr^(+3) and Co^(2+) ions have same number of unpaired electrons bu...

    Text Solution

    |

  19. (A) +3 oxidation states is characteristic property of lanthanoids but ...

    Text Solution

    |

  20. (A) Steel is an alloy of iron with a metal. (R) Same steels contain ...

    Text Solution

    |