Chemistry MCQs for NEET — Practice Questions with Answers

Choose correct option

I. Transition metals are characterised by variable oxidation state II. Elements of IB & IIB are transition elements

III. Elements of gp1 exhibit only +1 O.S

IV. Group 17 contains only gases

Choose correct option I. The ionisation enthalpy of Be > B II. d–Block elements are known as representative elements III. Palladium is the only element of fifth period that has no electron in fifth energy level IV. The second ionisation enthalpy of Al is greater than that of Mg V. Among Li, Be, B ,C N ; Li has least value of electron gain enthalpy

Choose correct option I. O.S of ‘O’ in $OF_2$ is –2 II. Ionisation enthalpy is the minimum amount of energy required to remove an electron from an atom III. Screening effect : it is the attraction of electron towards the nuclear IV. Half filled orbitals are more stable half fully filled orbitals

Match the following Set A

1. Strongest reductant
2. Fully filled d–orbital
3. Noble metal
4. Actinide Set B p) silver q) Berkelium r) Copper s) Iodide ion t) Sodium ion

Match the following Set A 1. Osmium 2. Lead 3. Tungsten 4. Caesium Set B p) Hardest metal electric q) poor conductor of current r) largest size s) most reactive solid matter t) highest oxidation state

Set A

1. Br
2. Ba
3. Se
4. Rb Set B p) Chalcogen q) alkali metal r) alkaline earth metal s) Halogen

Match the following Set A

1. Hg
2. Carbon (Diamond)
3. Bromine
4. Caesium & F Set B p) Liquid non–metal q) reacts very violently r) reaction endothermic s) Liquid metal t) extremely high M.P

Match the following Set A

1. Inner transition elements
2. Transition
3. Typical element
4. Representative element Set B p) 3rd period q) s & p Block r) d– Block s) f–Block t) p–Block

Match the following Set A

1. Be < Al
2. Aufbau principle
3. $ns^2 np^{1– 5} $
4. $ ns^2 np^6 $ Set B p) noble gases q) p–Block r) Diagonal relationship s) Block deciding rule

The position of element A, B, C & D are