The element that does not show positive oxidation state in its compounds is
Xe
Cl
O
F
The configuration associated with biggest jump between second and third ionisation energy is
1s22s22p6 3s2
1s22s22p2
1s22s22p63s1
1s22s22p1
Of the following pairs, the one containing a metalloid element is _________
F&Cl
Ca &Mg
As & Sb
Na & K
On Pauling electronegativity scale, the element nearest to fluorine is?
N
Ne
CI
Noble gases are group of elements which exhibit very
Minimum electronegativity
Low chemical activity
High chemical activity
High diamagnetic properties
Metals, non- metals and metalloids are present in
d- block
f- block
s- block
p- block
Out of the following the atomic number of the element having highest vapour pressure at room temperature is
Z=25
Z=48
Z=30
Z=80
On the basis of group valencies, the formula of the compound formed between tin and fluorine is
SnF3
SnF4
SnF6
SnF
Which of the following is not a Dobereiner triad ?
Li, Na, K
Cl, Br, I
Fe, Co, Ni
Ca, Sr, Ba
The decreasing order of the second ionization potential of K, Ca and Ba is
K > Ca > Ba
Ca > Ba > K
Ba > K> Ca
K > Ba > Ca