Which of the following has the least density?

1. Na

2. Li

3. Mg

4. K

Subtopic:  Modern Periodic Table & Periodicity |
 72%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

An element having the electronic configuration of its atom ns2 np2 should have similar properties to those of:

1. Sodium

2. Carbon

3. Magnesium

4. Oxygen

Subtopic:  Electronic Configuration |
 75%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Which of the following exhibits variable oxidation states?

1. Na 2. Cu
3. Mg 4. Al
Subtopic:  Modern Periodic Table & Periodicity |
 76%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The lightest metal in the periodic table is:

1. H

2. Mg

3. Ca

4. Li

Subtopic:  Modern Periodic Table & Periodicity |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

The electronic configuration that represents the d-block element is: 

1. 1s2 2s2 2p6 3s23p63d10 4s24p6

2. 1s2 2s2 2p6 3s23p63d10 4s24p1

3. 1s2 2s2 2p6 3s23p63d10 4s2

4. 1s2 2s2 2p6 3s23p6 4s2

Subtopic:  Electronic Configuration |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
Links
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The most common oxidation state of cerium (Ce) is:

1. +5, +3

2. +5, +4

3. +3, +4

4. +3, +5

Subtopic:  Electronic Configuration |
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Which of the electronic configuration of an atom has the lowest ionization enthalpy? 

1. 1s2,2s22p5

2. 1s2,2s22p3

3. 1s2,2s22p6,3s1

4. 1s2,2s22p6

Subtopic:  Ionization Energy (IE) |
 79%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

advertisementadvertisement

The difference between ions and atoms is of:

1. relative size

2. Configuration

3. presence of charge

4. All of these

Subtopic:  Modern Periodic Table & Periodicity |
 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch