Question # 1

Ionization energy of calcium is.

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Lower than that of barium

Lower than that of magnesium

Higher than that of beryllium

Lower than that of strontium

The concept of atomic number was introduced by

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Alrazi

Mendeleeve

Moseley

Dobereiner

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

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Be

C

N

O

Which has greater hydration energy.

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Li+

Na+

K+

Mg+2

Which hydride is intermediate in nature.

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NaH

BeH2

NH3

HCl

As you proceed across a period in the periodic table the first ionization energy

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Decrease

Increase

Remains constant

First increase up the middle of period and then decreases

Which one is an incomplete period

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4th

5th

6th

7th

The oxides of metal sare generally

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Acidic

Basic

Neutral

Amphoteric

What criteria did Mendeleev use in arranging his periodic table.

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Atomic mass

Atomic number

Mass number

Density

Mark the correct statement.

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Na+ is smaller than Na atom

Na+ is large than Na atom

Cl- is smaller than Cl atom

cl- and Cl are equal in size

Which oxide is more basic in nature.

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Beo

MgO

CaO

BaO

Which class of elements shows law value of first ionization potential.

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Alkali metals

Alkaline earth metals

Halogens

Noble gases

Which element has lowest melting point

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Beryllium

Magnesium

Calcium

Barium

Which is the longest periodic table

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4

5

6

7

In which one of the following sets do all three particles have same number of total electrone

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F- ,Cl-,Br-

Li+ , Na+ , K+

N^--3, O-2, F-,

Na+, Mg+2, K+

Which one of the following elements has the largest second ionization energy.

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O

Na

F

Ne

Keeping in view size of atoms ,which order is the correct one.

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Mg > Sr

Ba > Mg

Lu > Ce

Cl > I

Which of the following are alkaline earth metals?

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Be, Mg, Ca

Li, Na, K

Fe, CO, Ni

B, Al, Ga

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