General
✓✗The correct order of the decreasing ionic radii among the following isoelectronic species is
- Ca2+ > K+ > S2– > Cl–
- Cl– > S2– > Ca2+ > K+
- S2– > Cl– > K+ > Ca2+
- K+ > Ca2+ > Cl– > S2–
General
✓✗One of the characteristic properties of non-metals is that they
- are reducing agents
- form basic oxides
- form cations by electron gain
- are electronegative
General
✓✗Ionic radii are
- inversely proportional to effective nuclear charge
- inversely proportional to square of effective nuclear charge
- directly proportional to effective nuclear charge
- directly proportional to square of effective nuclear charge.
General
✓✗The correct order of atomic radii in group 13 elements is
- B < Al < In < Ga < Tl
- B < Al < Ga < In < Tl
- B < Ga < Al < Tl < In
- B < Ga < Al < In < Tl
General
✓✗The electronic configuration of an element is 1s22s22p63s23p3. What is the atomic number of the element, which is just below the above element in the periodic table?
- 33
- 34
- 36
- 49
General
✓✗In the periodic table, with the increase in atomic number, the metallic character of an element
- decreases in a period and increases in a group
- increases in a period and decreases in a group
- increases both in a period and the group
- decreases in a period and the group
General
✓✗Which one of the following arrangements does not give the correct picture of the trends indicated against it?
- F2 > Cl2 > Br2 > I2: Bond dissociation energy
- F2 > Cl2 > Br2 > I2 : Electronegativity
- F2 > Cl2 > Br2 > I2 : Oxidizing power
- F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
General
✓✗Correct order of 1st ionisation potential among following elements Be, B, C, N, O is
- B < Be < C < O < N
- B < Be < C < N < O
- Be < B < C < N < O
- Be < B < C < O < N
General
✓✗The electronic configuration of four elements are given below. Which elements does not belong to the same family as others?
- [Xe]4f145d104s2
- [Kr]4d105s2
- [Ne]3s23p5
- [Ar]3d104s2
General
✓✗The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?
- Carbon family, [Rn] 5f14 6d10 7s2 7p2
- Oxygen family, [Rn] 5f14 6d10 7s2 7p4
- Nitrogen family [Rn] 5f14 6d10 7s2 7p6
- Halogen family, [Rn] 5f14 6d10 7s2 7p5
General
✓✗Among the elements Ca, Mg, P and Cl, the order of increasing atomic radii is
- Mg < Ca < Cl < P
- Cl < P < Mg < Ca
- P < Cl < Ca < Mg
- Ca < Mg < P < Cl
General
✓✗For the second period elements the correct increasing order of first ionization enthalpy is
- Li < Be < B < C < O < N < F < Ne
- Li < Be < B < C < N < O < F < Ne
- Li < B < Be < C < O < N < F < Ne
- Li < B < Be < C < N < O < F < Ne
General
✓✗Na+, Mg2+, Al3+ and Si4+ are isoelectronic. The order of their ionic size is
- Na+ > Mg2+ < Al3+ < Si4+
- Na+ < Mg2+ > Al3+ > Si4+
- Na+ > Mg2+ > Al3+ > Si4+
- Na+ < Mg2+ > Al3+ < Si4+
General
✓✗The ions O2–, F–, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show
- a significant increase from O2– to Al3+
- a significant decrease from O2– to Al3+
- an increase from O2– to F– and then decrease from Na+ to Al3+
- a decrease from O2– to F– and then increase from Na+ to Al3+.
General
✓✗Which of the following order is wrong?
- NH3 < PH3 < AsH3 – acidic
- Li < Be < B < C – 1st IP
- Al2O3 < MgO < Na2O < K2O – basic
- Li+ < Na+ < K+ < Cs+ – ionic radius.