Practice free Chemistry NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
General electronic configuration of outermost and penultimate shell of an atom is
(n - 1)s2 (n - 1) p6 (n - 1)dx ns2. If n = 4 and x = 5, the number of proton in the nucleus is:
(c) It is 1s2 ,2s22p6 ,3s23p63d5 ,4s2 , i.e.,
The maximum number of valency electrons possible for atoms in the second period of the periodic table is:
(c) Last element of second period is Ne which has 8 valence electrons.
If a certain element has an atomic number 19, the element is:
(b) It has 1s2, 2s2 2p2, 3s2 3p6, 4s1 electron configuration. It has one electron in their outermost shell, hence, have the tendency to lose it.
Which of the following has the least density?
Li has minimum density.
density increases down the grp,exception is Na ,which is having higher density than K.
Eka aluminium and eka silicon are now known as:
(a)
eka was used to indicate element place below in the group. so element below aluminium or element below silicon
An element having the electronic configuration of its atom ns2 np2 should have similar properties to those of:
(b) 6C has electronic configuration 1s2 , 2s2 2p2
The order of basic character of given oxides is:
(a) According to their metallic character which decreases from Na to Cu.
higher the metallic character, higher the basic nature of their oxide.
the lightest metal in the periodic table is:
Mass no. of metal increases along the period and down the group also.
Which electronic configurations represent to a transition element?
The differentiating electron enters in d-sub-shell.
Low melting point of manganese in the 1st transition series is due to:
(b) Due to d5 configuration, metallic bonds are weak. d5 orbital is half filled as a result of that 3d electrons are more tightly held by the nucleus and this reduces the de-localization of electrons resulting in weaker metallic bonding.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.