TNPSC Chemistry - Periodic Classification of Elements
Exam Duration: 45 Mins Total Questions : 30
Consider the following statements
1.In Modern Periodic Table, the number of periodic is 7
2.In Modern Periodic Table, the number of periodic is 18
3.Which of the following is/are correct?
- (a)
Only 1
- (b)
2 and 3
- (c)
1 and 2
- (d)
1,2 and 3
Consider the following statements with reference to the Periodic Table of chemical element
1.lonisation potential gradually decreases along a period.
2.In a group of element, electron affinity decrease as the atomic weight increases.
3.In a given period,electronegativity decrease as the atomic number increases.
Which of these statements is/are correct?
- (a)
Only 1
- (b)
Only 2
- (c)
1 and 3
- (d)
2 and 3
Which group of Periodic Table contains no metal?
- (a)
I A
- (b)
III A
- (c)
VII A
- (d)
VII B
Match the following
| Column I | Column II |
| A.Lightest metal | 1.K+ |
| B.Non-stoichiometric compound | 2.Li |
| C.Most water soluble hydroxide | 3.Fe3O4 |
| D.Element with zero electron affinity | 4.Ne |
- (a)
A B C D 2 3 1 4 - (b)
A B C D 3 1 4 2 - (c)
A B C D 1 4 3 2 - (d)
A B C D 4 2 1 3
Transition metals are often paramagnetic owing to
- (a)
high mp and bp
- (b)
the presence of vacant orbitals
- (c)
the presence of unpaired electrons
- (d)
malleability and ductility
In a period, the electrons are arranged in the order of
- (a)
constant charges in the nucleus
- (b)
equal charges in the nucleus
- (c)
decreasing charges in the nucleus
- (d)
increasing charges in the nucleus
All the elements in the group in the Periodic Table have the same
- (a)
atomic weight
- (b)
number of valence electrons
- (c)
atomic number
- (d)
None of the above
Match the Column I and Column II.
| Column I | Column II |
| A.Elements in group I A | 1.Insert gas |
| B.Elements in group zero | 2.Alkali metal |
| C.Elements of d-block | 3.Inner-transition |
| D.Elements of f-block | 4.Transitiionelement |
- (a)
A B C D 2 1 4 3 - (b)
A B C D 1 4 3 2 - (c)
A B C D 4 3 2 1 - (d)
A B C D 3 2 1 4
Which one of the following properties changes with valency?
- (a)
Atomic weight
- (b)
Equivalent weight
- (c)
Molecular weight
- (d)
Density
Which one of the following is an element which never exhibits positive oxidation state in any of its compounds?
- (a)
Oxygen
- (b)
Chlorine
- (c)
Fluorine
- (d)
Carbon
Which of the following has maximum density?
- (a)
Chloroform
- (b)
Water
- (c)
Benzene
- (d)
Ice
Match Column I with Column II.
| Column I | Column II |
| A.Modern periodic law | 1.Groups |
| B.Father of periodic Table | 2.Mosely |
| C.Vertical lines in Modern periodic Table | 3.Periods |
| D.Horizontal lines in Modern periodic Table | 4.Mendeleef |
- (a)
A B C D 3 4 2 1 - (b)
A B C D 4 1 3 2 - (c)
A B C D 2 4 1 3 - (d)
A B C D 2 1 3 4
Which one among the following metals is more reactive than hydrogen?
- (a)
Mercury
- (b)
Copper
- (c)
Silver
- (d)
Tin
Assertion (A) lonisation energy decreases on moving down the group.
Reason (R) Force of attraction between electrons and nucleus decreases on moving down the group.
- (a)
Both A and R are true and R in the correct explanation of A
- (b)
Both A and R are true but and R is not the correct explanation of A
- (c)
A is true, but R is false
- (d)
A is false, but R is true
Assertion (A) Noble gases have the lowest ionization enthalpies in their respective periods.
Reason (R) Noble gases have stable electron configuration.
- (a)
Both A and R are individually true and R in the correct explanation of A
- (b)
Both A and R are individually true, but R is not the correct explanation of A
- (c)
A is true, but R is false
- (d)
A is false, but R is true
The long form of Periodic Table is based on
- (a)
electronegativity
- (b)
mass of the atom
- (c)
shape of the atom
- (d)
atomic number
Match Column I with Column II
| Column I | Column II |
| A.Element with smallest atomic radius | 1.Cs |
| B.Element with largest atomic radius | 2.F |
| C.Element with highest electron affinity | 3.Br |
| D.Element with negative electron affinity | 4.CL |
- (a)
A B C D 3 2 1 4 - (b)
A B C D 2 1 4 3 - (c)
A B C D 1 4 3 2 - (d)
A B C D 4 3 2 1
Consider the following statements
1.Technetium was the element to be made aetificially.
2.The non-metals are poor conductors of heat and electricity.
3.Hydrogen has a single positive charge, like the alkali metals, but at room temperature, it is a gas that doesn't act labeled a metal.Therefore hydrogen usually is a non-metal.
Which of the statements given above are correct?
- (a)
1 and 2
- (b)
2 and 3
- (c)
1 and 3
- (d)
1,2 nd 3
The arrangement of Na,Rb,K,Cs in the increasing order of atomic radius is
- (a)
Rb<K<Cs<Na
- (b)
K<Na<Cs<Rb
- (c)
Na<Cs<K<Rb
- (d)
Na<k<Rb<Cs
Which of the following pairs of elements is in the same period of the Periodic Table?
- (a)
Na,Ca
- (b)
Na,Cl
- (c)
Ca,Cl
- (d)
Mg,Sb
The total number of lanthanide elements is
- (a)
8
- (b)
32
- (c)
14
- (d)
10
What is the correct increasing order of electronegativity for the most common oxidation states among the following elements?
- (a)
F<O<N<C
- (b)
O<N<C<F
- (c)
C<N<F<O
- (d)
C<N<O<F
In Periodic Table, metallic elements appear
- (a)
in the left-hand columns
- (b)
in the tops rows
- (c)
in the right-hand columns
- (d)
in the bottom rows
The first element of rare metal is
- (a)
cerium
- (b)
actinium
- (c)
uranim
- (d)
lanthanum
Match Column I with Column II
| Column I | Column II |
| A.Most reactive alkali metal. | 1.F2 |
| B.Chemically most active non-metal | 2.Cs |
| C.Metal with maximum density | 3.Hg |
| D.Transition metal is in liquid state | 4.Os |
- (a)
A B C D 4 3 2 1 - (b)
A B C D 1 4 3 2 - (c)
A B C D 2 1 4 3 - (d)
A B C D 3 2 1 4
Specific gravity of silver is 11 and specific gravity of iron is 8.Which one of among the following is the approximate relative density of silver with respect to iron?
- (a)
1.4
- (b)
0.7
- (c)
3.0
- (d)
2.8
Match Column I with Column II
| Column I | Column II |
| A.Recently named by IUPAC | 1.Fe |
| B.Variable valency | 2.Ds |
| C. Maximum electronegativity | 3.CL |
| D.Maximum electron affinity | 4.F |
- (a)
A B C D 3 2 1 4 - (b)
A B C D 4 3 2 1 - (c)
A B C D 1 4 3 2 - (d)
A B C D 2 1 4 3
In term of magnetic properties, oxygen belongs to
- (a)
magnetic materials
- (b)
ferromagnetic materials
- (c)
paramagnetic materials
- (d)
diamagnetic materials
Consider the following statements about d-block elements
1.They are all metals.
2.All of them are not coloured.
3.They show variable valency.
4.Most of them form simple salts.
Which of the statements given above are correct?
- (a)
1 and 2
- (b)
1,2 and 3
- (c)
2 and 3
- (d)
3 and 4
Match Column I with Column II.
| Column I | Column II |
| A.First element produced artificially | 1.Liquid NH3 |
| B.Chemical used for cooling in refrigerator | 2.Technetium |
| C.Laughing gas | 3.Aluminium |
| D.Most abundant metal in the earth's crust | 4.Nitrous oxide |
- (a)
A B C D 1 4 3 2 - (b)
A B C D 2 1 4 3 - (c)
A B C D 4 3 2 1 - (d)
A B C D 3 2 1 4
