Chemistry Question Bank

The number of elements present in fifth period of Periodic Table is

Which one is the correct order of the size of the iodine species.

The element with the lowest atomic number that has a ground state electronic configuration of (n-1) d6ns2 is located in the

When a chlorine atom becomes chloride ion, its size

The last element of the p-block in the 6th period is represented by the outermost electronic configuration.

The electronic configuration of the element which is just above the element with atomic number 43 in the same group is ............

Which of the following pairs has almost the same atomic radii?

Which one of the following ions has the highest value of ionic radius?

The elements with atomic numbers 9, 17, 35, 53, 85 are all

Molybdenum metal is related to which block?

The transition elements have a characteristic electronic configuration which can be represented as

Which one of the following pair of elements has similar properties?

Which of the following is not a Dobereiner’s triad?

ns and ns outermost electronic configuration belongs to the

Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute

Which element has the highest ionization energy?

In which of the following arrangements, the order is not according to the property indicated after it in the bracket? (Manipal 2009)

The element with atomic number 57 belongs to

Which of the following order is correct for the size of Fe³⁺, Fe, and Fe²⁺?

Increasing order of ionic size for the ions, F–, O₂–, Na⁺, Al³⁺ is (AMU 2009)

Assertion: Generally, ionization enthalpy increases from left to right in a period. Reason: When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of the inner co…

Assertion: Electron gain enthalpy becomes less negative as we go down a group. Reason: The size of the atom increases on going down the group and the added electron would be farther from the nucleus.

Assertion: Third ionization energy of sulphur is larger than phosphorous. Reason: There is a larger amount of stability associated with filled s- and p- sub-shells (a noble gas electron configuration) which correspond…

The element with highest I.E. is:

A, B, and C are hydroxy-compounds of the elements X, Y, and Z respectively. X, Y, and Z are in the same period of the periodic table. A gives an aqueous solution of pH less than seven. B reacts with both strong acids …