An element whose IUPAC name is ununtrium(Uut) belong to:
(1) s-block element
(2) p-block element
(3) d-block element
(4) Transition element
Which of the following graph is correct representation between atomic number (Z) and magnetic moment of d-block elements? [Outer electronic configuration : (n-1)dxns1 or 2]
Element of the third period that is expected to exhibit positive electron gain enthalpy is:
| 1. | Na | 2. | Al |
| 3. | Cl | 4. | Ar |
Which of the following is not a metal?
(1) Gold
(2) mercury
(3) Scandium
(4) Selenium
Arrange the following elements in increasing order of metallic character:
Si, Be, Mg, Na, P
1. P < Si < Be < Mg = Na.
2. P < Si > Be < Mg < Na
3. P > Si > Be >Mg > Na
4. P < Si < Be < Mg < Na.
An element whose IUPAC name is Ununtrium (Uut) belongs to:
1. s-Block elements
2. p-Block elements
3. d-Block elements
4. Inner transition elements .
The ionic radius indicates the distance between the nucleus and:
1. Outermost shell of an atom.
2. Outermost shell of an ion.
3. Outermost shell of the cation only.
4. Outermost shell of the anion only.
Which one of the following arrangements does not give the correct picture of the trends indicated against it?
(1) F2 > Cl2 > Br2 > I2 :Oxidising power
(2) F2 < Cl2 > Br2 > I2 : Electron gain enthalpy
(3) F2 > Cl2 > Br2 > I2 : Bond dissociation energy
(4) F2 > Cl2 > Br2 > I2: Electronegativity
X(g) X+(g) + e-, H=+720 KJ mol-1
Calculate the amount of energy required to convert 110 mg of 'X' atom in gaseous state into X+ ion. (Atomic wt. for X=7 g/mol)
(1) 10.4 kJ
(2) 12.3 kJ
(3) 11.3 kJ
(4) 14.5 kJ