Home
Class 12
CHEMISTRY
The following are some statements about ...

The following are some statements about Mendeleev's peridioc table
(i) It is based on increasing order of atomic numbers .
(ii) Mendeleev corrected the atomic weight of some elements like Be, In, U, etc.
(iii) (Ar, Ca), (Co, Cu), (Te , F) are three inverted pairs.
(iv) it is based on increasing order of atomic weights.

A

Only ( I ) is correct

B

( II ) & ( IV) are correct

C

only ( III ) is correct

D

Only ( IV )is correct

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • METALLURGY

    SIA PUBLICATION|Exercise PROBLEM|6 Videos

  • MOCK TEST 2

    SIA PUBLICATION|Exercise Chemistry|58 Videos

Similar Questions

Explore conceptually related problems

The following are some statements about Mendeleeff's periodic table i) It is based on increasing order of atomic numbers ii) Mendeleeff corrected the atomic weight of some elements like Be, In etc iii) (Ar,K), (Co,Ni), (Te,I) are three inverted pairs

The following are some statements about modern periodic table i) It is based on electronic configuration ii) It contains 7 periods and 18 groups iii) Each period begins with a non - metallic element

Following are some statements about modern periodic table i) It consists of s, p, d and f blocks ii) The energy levels filling order in 6th period is 6s, 4f, 5d and 6p iii) IIIA group contains maximum number of elements

The following are some statements about periodic properties i) Atomic size decreases from left to right in a period ii) The EA of 2nd element in VA, VIA, VIIA are greater than the first element iii) Acidic nature of oxides decreases and basic nature of oxides of elements increases down the group

Which of the following elements gives the correct increasing order of the atomic radii of O,F and N ?

Which of the following statements about the modern periodic table are incorrect ? (a) The elements in Modern periodic table are arranged on the basis of their decreasing atomic number. (b) The elements in Modern periodic table are arranged on the basis of their increasing atomic masses. (c) Isotopes are placed in adjoining groups in the periodic table. (d) The elements in the modern periodic table are arranged on the basis of their increasing atomic number.

Considering the atomic number and position in the periodic table, arrange the following elements in the increasing order of metallic character: Si, Be, Mg, Na, P.

The following are some statements about hybridisation i) Pure orbitals of same atom of an element will participate. ii) The number of hybrid orbitals formed is twice the number of pure orbitals that participate in hybridisation. iii) Completely filled (or) half-filled (or) vacant orbitals may participate in this process. The correct combination is

The following are some stements related to IIA group metals I) The reaction with water increases from Be to Ba II) The ionic nature of hydrides decreases from Be to Ba III) The thermal stability of the peroxides increases with increase in cationic size IV) The solubility of halides increases from Mg to Ba The correct statements are of

SIA PUBLICATION-MOCK TEST 1-CHEMISTRY
  1. Which of the following statement is correct ?

    Text Solution

    |

  2. Which of the following does not exhibit inert pair effect ?

    Text Solution

    |

  3. Potassium superoxide is used in oxygen cylinders in space and submarin...

    Text Solution

    |

  4. Which of the following is not correct regarding the electrolytic prepa...

    Text Solution

    |

  5. Which of the following is correct ?

    Text Solution

    |

  6. In exothermic reaction

    Text Solution

    |

  7. In which of the following the oxidation state of chlorine is +5?

    Text Solution

    |

  8. A : K(4)[Fe(CN(6))] is diamagnetic R: The alignments of magnetic di...

    Text Solution

    |

  9. Water drop stick to a glass suface due to

    Text Solution

    |

  10. If thermal energy predominates over intermolecular forces, then the su...

    Text Solution

    |

  11. The hybridisation of central atom is sp^(3)d^(2) in

    Text Solution

    |

  12. The formal charges on the three oxygen atoms in O(3) molecule are

    Text Solution

    |

  13. Among the elements A,B,C and D having atomic numbers 9,10,11 and 12 re...

    Text Solution

    |

  14. The following are some statements about Mendeleev's peridioc table (...

    Text Solution

    |

  15. Transition metal " X " has a configuration [Ar] 3d^(4) in its +3 oxida...

    Text Solution

    |

  16. The wave number of limiting line in Balmer series of hydrogen atoms is

    Text Solution

    |

  17. Which on oxidation will not give a carboxylic acid with the same numbe...

    Text Solution

    |

  18. PDI refers to

    Text Solution

    |

  19. The empirical formula of a compound is found to be C(2)H(3)O(4). The m...

    Text Solution

    |

  20. 40 grams of a sample of carbon on combustion left 10 % of it unreacted...

    Text Solution

    |