Which statement is true?

1. The electronegative nature of elements increases along the period

2. The electropositive nature of elements increases along the period

3. The chemical reactivity of elements increases along the period

4. The I.E  of element decreases along the period

Subtopic:  Ionization Energy (IE) |
 79%
From NCERT
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The most non-metallic element among the following is:

1. Be

2. B

3. Mg

4. Al

Subtopic:  Modern Periodic Table & Periodicity |
 68%
From NCERT
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The screening effect of 'd' electrons is:

1. Much less than s-electrons.

2. Much more than s-electrons.

3. Equal to s-electrons.

4. Equal to p-electrons.

Subtopic:  Screening Effect |
 79%
From NCERT
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Correct statement regarding transuranic elements is :

1. They have higher atomic number than uranium.

2. They are lighter than uranium.

3. They have lower atomic number than uranium.

4. They have same atomic number as uranium.

Subtopic:  Modern Periodic Table & Periodicity |
 78%
From NCERT
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The maximum number of valence electrons possible for atoms in the second period of the periodic table is:

1. 18

2. 10

3. 8

4. 2

Subtopic:  Electronic Configuration |
 72%
From NCERT
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The element having atomic number 19, is:

1. an inert gas

2. a metal with oxidation number +1

3. a non-metal with oxidation number -3

4. a metal with oxidation number -3

Subtopic:  Electronic Configuration |
 86%
From NCERT
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Which of the following has the least density?

1. Na

2. Li

3. Mg

4. K

Subtopic:  Modern Periodic Table & Periodicity |
 72%
From NCERT
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Eka aluminium and Eka silicon are now known as:

1. Ga and Ge 2. Al and Si
3. Fe and S 4. H+ and Si
Subtopic:  Modern Periodic Table & Periodicity |
 89%
From NCERT
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The order of basic character of given oxides is:

1. Na2O > MgO > Al2O3 > CuO

2. MgO > Al2O3 > CuO > Na2O

3. Al2O3 > MgO > CuO > Na2O

4. CuO > Na2O > MgO > Al2O3

Subtopic:  Nature of Compound |
 67%
From NCERT
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Which of the following exhibits variable oxidation states?

1. Na 2. Cu
3. Mg 4. Al
Subtopic:  Modern Periodic Table & Periodicity |
 77%
From NCERT
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