Q. No.The correct order of metallic character of elements B, Al, Mg and K is :
1.
B > Al > Mg > K
2.
Al > Mg > B > K
3.
Mg > Al > K > B
4.
K > Mg > Al > B
What is the correct order of non-metallic character for the elements B, C, N, F, and Si?
| 1. | B > C > Si > N > F | 2. | Si > C > B > N > F |
| 3. | F > N > C > B > Si | 4. | F > N > C > Si > B |
The correct order of their chemical reactivity of the elements F, Cl, O and N in terms of oxidizing property is :
| 1. | F > Cl > O > N
|
2. | F > O > Cl > N
|
| 3. | Cl > F > O > N
|
4. | O > F > N > Cl |
Which of the following statements is incorrect?
| 1. | Elements are classified into periods and groups |
| 2. | Elements with similar properties are placed in the same group |
| 3. | Arrangement in the periodic table makes the study of elements simpler |
| 4. | Elements are placed according to decreasing atomic number |
How many elements are contained in the sixth period of the modern periodic table?
1. Eight (8)
2. Eighteen (18)
3. Thirty-two (32)
4. Sixteen (16)
The element named after Lawrence Berkeley Laboratory is:
1. Seaborgium
2. Lawrencium
3. Moscovium
4. Hafnium
Boron has lesser ionization enthalpy than Beryllium, because:
| 1. | It is easier to remove electrons from p - subshell than a filled s - subshell. |
| 2. | The s-electron can be removed easier than the p-electron. |
| 3. | Ionization enthalpy decreases with an increase in atomic number. |
| 4. | Ionization enthalpy increases along the period. |
The difference between electron gain enthalphy and electronegativity is described by :
| 1. | Valence electrons | 2. | Atomic size |
| 3. | Ionic radii | 4. | Atomic number |
Incorrect statement about metal is:
1. Metals can donate electrons.
2. Metals form ionic compounds.
3. Metals are more electronegative.
4. Metals have less ionization energy.
Which group contains elements that exist as a non-metal, liquid, and gas at room temperature?
| 1. | 15 | 2. | 14 |
| 3. | 18 | 4. | 17 |
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