1 |
Which is the least reactive of all the alkali metals |
Li
Na
K
Cs
|
2 |
The mineral CaSO4.2H2O has the general name |
Dolomite
Gypsum
Calcite
Epsom Salt
|
3 |
Dolomite is a carbonate of |
Be
Mg
Na
Ba
|
4 |
------------- does not belong to Alkaline-Earth metals |
Be
Ra
Ba
Rn
|
5 |
Chile saltpeter has the chemical formal |
NaNO<sub>3</sub>
KNO<sub>2</sub>
Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>
Na<sub>2</sub>CO<sub>3</sub>.H<sub>2</sub>O
|
6 |
Which one of the following is not an alkali metal |
Francium
Caesuym
Rubidium
Radium
|
7 |
Which one does not belong to the alkaline earth metals |
Be
Ba
Ra
Rn
|
8 |
The word alkali is derived from which language |
Arabic
Greek
French
German
|
9 |
Which of the following the highest hydration energy |
Li<sup>+</sup>
Na<sup>+</sup>
K<sup>+</sup>
Mg<sup>++</sup>
|
10 |
Which of the following has highest M.P |
Aluminium
Silicon
Phosphorus
Sulphur
|
11 |
Correct order according to atomic size in the following is |
Na > K
Be > Mg
O > N
Cl > F
|
12 |
Which the correct statement |
Cl<sup>-</sup>is smaller than Cl atom
Cl<sup>-</sup>(Ion) and Cl (atom) are equal in size
Na<sup>+</sup>is smaller than Na atom
Na<sup>+</sup>is larger than Na atom
|
13 |
Which element has lowest melting point |
Beryllium
Magnesium
Calcium
Barium
|
14 |
Which of the following element has lowest ionization energy |
Beryllium
Boron
Carbon
Oxygen
|
15 |
Which of the following statement is correct |
Na atom is smaller than Na<sup>+</sup>
Na atom is larger than K atom
F atom is smaller than F<sup>-</sup>
F atom is larger than F<sup>-</sup>
|
16 |
Which is the longest periodic table |
4
5
6
7
|
17 |
Number of elements in the first period of the periodic table is |
2
8
14
18
|