Chemistry Question Bank

La (Lanthanum) having atomic number 57 is a member of:

The statement that is not correct for periodic classification of elements is:

The period number in the long form of the periodic table is equal to

The formation of the oxide ion, g O from oxygen atom requires first an exothermic and then an endothermic step as shown below: (NEET 2015) o f g g O e O ; H 141kJmol -> o f g g O e O ; H 780kJmol -> …

Which of the following orders of ionic radii is correctly represented? [AIPMT 2014]

Amongst the following, select the element having highest ionisation enthalpy. (MHT CET 2014)

The compound not acting as a reducing agent is (Manipal 2014)

The correct order of the decreasing ionic radii among the following isoelectronic species is (CBSE AIPMT 2010)

The element with the electronic configuration as [Ar]3d10 4s2 4p3 represents a (JCECE 2010)

Among the following the third ionization energy is highest for (AMU 2010)

Generally, the first ionization energy increases along a period. But there are some exceptions. One which is not an exception is (KCET 2010)

The property of attracting electrons by the halogen atoms in a molecule is called (JCECE 2010)

Which one of the following ions has electronic configuration Ar 3d ? (Atomic numbers: Mn = 25, Fe = 26, Co = 27, Ni = 28) (CBSE AIPMT 2010) (a) Co (b) Ni (c) Mn (d) Fe

Electronic configuration of an element X having atomic number 24 is (UP CPMT 2010)

Mg and Li are similar in their properties due to (VMMC 2010)

Ease of formation of the cation is favoured by (RPMT 2010)

Which one of the following is correct order of the size? (Haryana PMT 2010)

The element with atomic number 117 has not been discovered yet. In which family would you place this element if discovered? [Kerala CEE 2009]

Which represents the correct order of the first ionization potential of third-period elements? (AFMC 2009)

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

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

The oxide of an element whose electronic configuration is 1s2, 2s2 2p6, 3s1 is (KCET 2009)

It is believed that atoms combine with each other such that the outermost shell acquires a stable configuration of 8 electrons. If stability were attained with 6 electrons rather than 8; what would be the formula of t…

Element with atomic number 38, belongs to (MP PMT 2008)

Which two elements in the Periodic Table would you expect to combine in the most violent fashion? (Kerala CEE 2008)