19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The transition elements have a characteristic electronic configuration which can be represented as
Increasing order of ionic size for the ions, F–, O₂–, Na⁺, Al³⁺ is (AMU 2009)
Elements whose outer electronic configuration vary from ns2np1 to ns2np6 constitute
The elements with atomic numbers 9, 17, 35, 53, 85 are all
Molybdenum metal is related to which block?
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
Which of the following is not a Dobereiner’s triad?
Which one of the following pair of elements has similar properties?
ns and ns outermost electronic configuration belongs to the
The element with the electronic configuration as [Ar]3d10 4s2 4p3 represents a (JCECE 2010)
Which of the following is the correct statement about silicones ?
Which of the following is not true about structure of diamond and graphite ?
Which of the following is not a use of graphite ?
Match the column I with column II and mark the appropriate choice. Column I Column II
A type of zeolite used to convert alcohols directly into gasoline is
In graphite, the layers of carbon atoms are held by
What is the number of free electrons present on each carbon atom in graphite ?
Identify the wrong example from the following for the group 14 elements.
The purest form of coal is
Which of the following is not from 14 th group
Identify the incorrect statement.
In which of the following the inert pair effect is most prominent ?
Which of the following types of forces bind together the carbon atoms in diamond? (AIPMT 1992)
The incorrect statement regarding above reactions is:
Alumina may be converted into anhydrous aluminium chloride by: