Chemistry MCQS for Class 12 Chapter 1

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Which one is an incomplete period
4th
6th
5th
7th

Elements of Groups IIA are called
Halogens
Coinage metals
Alkaline earth metals
Alkali metals

Which of the following are alkaline earth metals?
Be, Mg, Ca
Li, Na, K
Fe, CO, Ni
B, Al, Ga

In modern periodic table VI period contains elements
32
10
18
8

The element of 2nd period, which has highest ionization energy from the following is
C
O
Be
N

Which of the following the highest hydration energy
Li+
Na+
Mg++
K+

Which of the following statement is correct
F atom is larger than F
Na atom is smaller than Na+
Na atom is larger than K atom
F atom is smaller than F

Which of the following has highest M.P
Sulphur
Phosphorus
Aluminium
Silicon

The concept of atomic number was introduced by
Alrazi
Dobereiner
Moseley
Mendeleeve

The basis of modern periodic table is
Atomic number
Electron affinity
Atomic mass
Ionization Potential

Which element has lowest melting point
Calcium
Magnesium
Beryllium
Barium

Which is the longest periodic table
4
6
5
7

Who gave the law of Triads in 1829?
Newland
Mendeleev
Dobereiner
Mosely

Which of the following element has lowest ionization energy
Carbon
Boron
Oxygen
Beryllium

Number of elements in the first period of the periodic table is
8
18
2
14

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