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Classification of Elements and Periodicity in Properties

398 Questions Start Errorless Test
All Exams Errorless Allen
IIT 1995 Q301 Errorless 7. Critical Thinking MCQ
Which has most stable +2 oxidation state
A.
Sn
B.
Pb
C.
Fe
D.
Ag
Roorkee (IIT) 1995 Q302 Errorless 7. Critical Thinking MCQ
The decreasing order of size of isoelectronic series $K^{+}, Ca^{2+}, Cl^{-}$ and $S^{2-}$ is
A.
$K^{+} > Ca^{2+} > S^{2-} > Cl^{-}$
B.
$K^{+} > Ca^{2+} > Cl^{-} > S^{2-}$
C.
$Ca^{2+} > K^{+} > Cl^{-} > S^{2-}$
D.
$S^{2-} > Cl^{-} > K^{+} > Ca^{2+}$
Roorkee (IIT) 1995 Q303 Errorless 7. Critical Thinking MCQ
Which one of the elements has the maximum electron affinity
A.
$F$
B.
$Cl$
C.
$Br$
D.
$I$
Roorkee (IIT) 1995 Q304 Errorless 7. Critical Thinking MCQ
Which element has the highest electronegativity Or Which of the following is the most electronegative
A.
$F$
B.
He
C.
Ne
D.
Na
CBSE PMT 1994 Q305 Errorless 2. Atomic and Ionic radii MCQ
Which of the following statement concerning lanthanides elements is false
A.
Lanthanides are separated from one another by ion exchange method
B.
Ionic radii of trivalent lanthanides steadily increases with increase in the atomic number
C.
All lanthanides are highly dense metals
D.
More characteristic oxidation state of lanthanide
MP PMT 1994 Q306 Errorless 2. Atomic and Ionic radii MCQ
An atom of an element has electronic configuration 2, 8, 1. Which of the following statement is correct
A.
The element's valency is 7
B.
The element exists as a diatomic molecule
C.
The element is of non-metallic nature
D.
The element forms a basic oxide
MP PET 1994 Q307 Errorless 2. Atomic and Ionic radii MCQ
In which of the following pairs the difference between the covalent radii of the two metals is maximum
A.
$K, Ca$
B.
Mn, Fe
C.
Co, Ni
D.
Cr, Mn
MP PMT 1994 Q308 Errorless 3. Ionisation Energy MCQ
The screening effect of inner electrons of the nucleus causes
A.
A decrease in the ionisation potential
B.
An increase in the ionisation potential
C.
No effect on the ionisation potential
D.
An increase in the attraction of the nucleus to the electrons
CPMT 1994 Q309 Errorless 4. Electron affinity MCQ
The electron affinity of
A.
Carbon is greater than oxygen
B.
Sulphur is less than oxygen
C.
Iodine is greater than bromine
D.
Bromine is less than chlorine
MP PET 1994 Q310 Errorless 5. Electronegativity MCQ
On Pauling scale which of the following does not have electronegativity $\geq 3.0$
A.
Oxygen
B.
Nitrogen
C.
Chlorine
D.
Bromine
CPMT 1993 Q311 Errorless 1. Extended or long form of periodic table MCQ
The total number of rare-earth elements is
A.
8
B.
32
C.
14
D.
10
EAMCET 1993; MP PET 2001, 11; AIEEE 2004 Q312 Errorless 2. Atomic and Ionic radii MCQ
Which one of the following ions has the highest value of ionic radius
A.
$O^{2-}$
B.
$B^{3+}$
C.
$Li^{+}$
D.
$F^{-}$
MP PET 1993 Q313 Errorless 2. Atomic and Ionic radii MCQ
Which one of the following is the biggest ion
A.
$Al^{+3}$
B.
$Ba^{+2}$
C.
$Mg^{+2}$
D.
$Na^{+}$
MP PET 1993 Q314 Errorless 2. Atomic and Ionic radii MCQ
Which of the following sets of elements have the strongest tendency to form anions
A.
$N, O, F$
B.
$P, S, Cl$
C.
As, Se, Br
D.
$Sb, Te, I$
MP PMT 1993; MP PET 1995, 2001; CBSE PMT 2009 Q315 Errorless 6. Valency and oxidation state MCQ
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states
A.
$3d^{3}4s^{2}$
B.
$3d^{5}4s^{1}$
C.
$3d^{5}4s^{2}$
D.
$3d^{2}4s^{2}$
MP PET 1993 Q316 Errorless 6. Valency and oxidation state MCQ
In the periodic table, the metallic character of elements
A.
Decreases from left to right across a period and on descending a group
B.
Decreases from left to right across a period and increases on descending a group
C.
Increases from left to right across a period and on descending a group
D.
Increases from left to right across a period and decreases on descending a group
KCET 1993 Q317 Errorless 6. Valency and oxidation state MCQ
Which is the weakest base
A.
NaOH
B.
KOH
C.
$\mathrm{Ca(OH)_2}$
D.
$\mathrm{Zn(OH)_2}$
AIIMS 1992; UPSEAT 2001 Q318 Errorless 1. Extended or long form of periodic table MCQ
Chloride of an element A gives neutral solution in water. In the periodic table, the element A belongs to
A.
First group
B.
Third group
C.
Fifth group
D.
First transition series
AFMC 1992; Manipal MEE 1995 Q319 Errorless 1. Extended or long form of periodic table MCQ
Which of the following elements is a lanthanide (Rare-earth element)
A.
Cadmium
B.
Californium
C.
Cerium
D.
Cesium
MNR 1992; UPSEAT 1999, 2000, 02 Q320 Errorless 1. Extended or long form of periodic table MCQ
The electronic configuration of the element which is just above the element with atomic number 43 in the same periodic group is
A.
$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{5} 4s^{2}$
B.
$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} 4s^{2} 4p^{5}$
C.
$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{6} 4s^{1}$
D.
$1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} 4s^{1} 4p^{6}$
CBSE PMT 1992 Q321 Errorless 2. Atomic and Ionic radii MCQ
Elements of which group form anions most readily
A.
Oxygen family
B.
Nitrogen group
C.
Halogens
D.
Alkali metals
EAMCET 1992 Q322 Errorless 2. Atomic and Ionic radii MCQ
$Al^{3+}$ has a lower ionic radius than $Mg^{2+}$ because
A.
Mg atom has less number of neutrons than Al
B.
$Al^{3+}$ has a higher nuclear charge than $Mg^{2+}$
C.
Their electronegativities are different
D.
Al has a lower ionisation potential than Mg atom
AIIMS 1992 Q323 Errorless 3. Ionisation Energy MCQ
Which of the following transitions involves maximum amount of energy
A.
$M^{-}(g)\rightarrow M(g)$
B.
$M(g)\rightarrow M^{+}(g)$
C.
$M^{+}(g)\rightarrow M^{2 + }(g)$
D.
$M^{2 + }(g)\rightarrow M^{3 + }(g)$
KCET 1992 Q324 Errorless 3. Ionisation Energy MCQ
Which of the following elements will have the lowest first ionisation energy
A.
Mg
B.
Rb
C.
Li
D.
Ca
CBSE PMT 1992 Q325 Errorless 6. Valency and oxidation state MCQ
If the valency shell electronic structure for an element is $ns^{2}np^{5}$ , this element will belong to the group of
A.
Alkali metals
B.
Inert metals
C.
Noble gases
D.
Halogens