Q.1
Upto which element, the Law of Octaves was found applicable?
  • CALCIUM
  • MAGNESIUM
  • ALUMINIUM
  • POTASSIUM
Q.2
Which of the following is the outermost shell for elements of period 2 ?
  • K
  • L
  • M
  • N
Q.3
According to Mendeleev periodic law, the elements were arranged in the Periodic table in order of
  • Increasing atomic number
  • Decreasing atomic number
  • Increasing atomic mass
  • Decreasing atomic mass
Q.4
In Mendeleev periodic table,gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic table later
  • Germanium
  • Chlorine
  • Oxygen
  • Silicon
Q.5
On moving from left to right in a period in the Periodic table, the size of atom
  • Increases
  • Decreases
  • Does not change appreciably
  • First decreases and then increases
Q.6
Which one of the following elements do not constitute a Doebereiner's triad ?
  • Cl,Br, I
  • Li,Na,K
  • S,Se,Te
  • N,P,As
Q.7
In the second period of periodic table____________ has the largest size.(excluding noble gases Ne)
  • Lithium
  • Both
  • Li
Q.8
How many groups present in modern Periodic table ?
  • 7
  • 18
  • 8
  • 14
Q.9
The chemical properties of calcium (Ca) are similar to those of .......................
  • 19K
  • 12Mg
  • 25Mn
  • 3Li
Q.10
Noble gases were included in Mendeleev's periodic table in the
  • 1st Group.
  • 7th Group.
  • 8th Group.
  • None of these
Q.11
According to the periodic Law of elements, the variation in properties of elements is related to their
  • nuclear masses.
  • atomic number.
  • nuclear neutron-proton number ratios.
  • atomic masses.
Q.12
Newlands could classify elements only upto
  • Copper.
  • Chlorine.
  • Calcium.
  • Chromium.
Q.13
An element M is in group 13th of the periodic table, the formula for its oxide is
  • MO
  • M2O3
  • M3O2
  • None
Q.14
Which of the following is the correct order of the atomic radii of the elements oxygen, fluorine and nitrogen?
  • O < F < N
  • N < F < O
  • O < N < F
  • F < O < N
Q.15
The electronic configuration of an element M isIn modern periodic table, the element M is placed in
  • 4 group
  • 2 group
  • 14 group
  • 18 group
Q.16
What happens to the electropositive character of elements on moving from left to right in a periodic table?
  • Increases
  • Decreases
  • First increases than decreases
  • First decreases than increases
Q.17
Cl, I if these are the Dobereiner’s triad and the atomic masses of chlorine and the Iodine are 35,5 andrespectively. The atomic mass & the particular element is?
  • Ar, 40
  • F,19
  • Br, 81.25
  • At, 210
Q.18
Dobereiner tried to arrange the elements with similar properties into group. So, he called the groups “_______” Octaves
  • Octaves
  • Triad
  • Metals
  • Non-Metals
Q.19
If the distance between two Cl atoms in Cl2molecule is 1.98Å, then the radius of Clatom is ________.
  • 0.99 Å
  • 0.09 Å
  • 0.90 Å
  • 0.98 Å
Q.20
Chemical formula of rust is ________.
  • FeO.xH2O
  • FeO4.xH2O
  • Fe2O3.xH2O
  • FeO
0 h : 0 m : 1 s