Practice free Classification of elements and Periodicity in properties (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
An element X is placed in group IA of the perodic table because it forms:
(c) I gp. elements forms ionic chloride.
Which one of the following is an amphoteric oxide?
(c) ZnO reacts with acids as well as with alkalies.
Elements which generally exhibit multiple oxidation states and whose ions in aqueous medium are usually coloured aand whose ions in aqueous medium are usually coloured are:
(b) A characteristic of transition elements.
Transition elements exhibit variable oxidation states because they release electrons from the following orbits:
(b)
because of energy difference between (n-1)d and ns is very low
In II period most acidic oxide is formed by:
(a) Non-metallic oxides are acidic and acidic nature increases along the period.
Elements of group IB and IIB are called:
(b) Transition elements are present in B sub gp. of Mendeleev's periodic table.
Which element has the greatest tendency to lose electron?
(b) Metal possess more tendency to lose electron.
The outer electron configuration of Gd (Atomic no. 64) is:
(d) Gadolinium (64Gd) has [Xe]54 4f7 5d16s2 configuration.
The radius of La3+ (at. no. 57) is 1.06 The radius of Lu3+ (at.no. 71) might be:
(b) Due to lanthanoid contraction
Which of the following transition metal ions has the lowest density?
(c) Density increases along the period.
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