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This is a Short Answer Type Questions as classified in NCERT Exemplar

Molecular mass of Ca₃ (PO₄)₂ = 310.18 g / mole 

Given mass of calcium 4 x 30= 120 g

Given mass of phosphorous =  31 x 2 =62 g

Given mass of oxygen = 16 x 8 = 128 g

Mass percent of Calcium = $\frac{120}{310.18\mathrm{}}$ x 100 = 38.71%

Mass percent of Phosphorous = $\frac{62}{310.18\mathrm{}}$  x 100 = 20%

Mass percent of Oxygen = $\frac{128}{310.18\mathrm{}}$ x 100 = 41.29 %

The BCom admission process at Takshashila University comprises four basic steps. At first, students who meet the eligibility requirements must visit the university's official website and fill out an application form. Further, the university ranks applicants based on scores obtained by them in the qualifying examination. Further, the admission committee shortlists students based on their rank and seat intake. At last, After that, students who are offered admissions must pay the fees prescribed by the university.

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: (ii) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁹ 4s²

As per the Hund's rule the half-filled and fully filled orbital leads to the extra stability due to the symmetry thus fully filled 3d and half-filled 4s is preferred.

It is advised to the candidates to focus on both Prelims and Mains syllabus rigorously. Understanding and mastering the content will not only enhance their understanding but also improve their chances of success in the examination. He or she should practice previous year papers and also go through the exam pattern properly. Practice mock test and improve accuracy. 

This is a Multiple Choice Questions as classified in NCERT Exemplar

 Ans: Option (iii)

Electrons move in a circular path of fixed energy called orbits .

As per Rutherford’s α-particle scattering experiment the nucleus is surrounded by electrons that move around the nucleus with a very high-speed in circular paths called orbits. It does not mention the energy or stability of the electrons revolving around the nucleus. 

BA Geography curriculum is generally not very difficult to study. There are a broad range of topics included in the course syllabus and those who have a strong base in the field of economics will find it comparatively easier to study. However, students pursuing this course will be required to memorize the concepts as the subjects are mostly theoretical. Pursuing BA Geography courses will required time management and a strategic approach.

This is a Short Answer Type Questions as classified in NCERT Exemplar

SI unit of the mole is mol. The amount of a substance that contains as many particles or entities as there are atoms in exactly

12 g (0.012 kg) of the C-12  isotope is defined as a mole. One mole is defined as follows:

1 mole =  6.023 x 10²³

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Students who have graduated with a BCom course from Takshashila University have a broad career scope to explore. After completing this course, students gain knowledge of various facets, such as Financial Management, Time Value of Money, Cost Accounting, etc. Listed below are a few job profiles for BCom degree holders to pursue and their corresponding average salaries:

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There are many subjects in BA Geography. Some fundamental topics covered are mentioned in the list provided below:

• Physical Geography
• Cultural Geography
• Cartography
• Geomorphology
• Climatology
• Oceanography
• Resource Geography

Read more:

Geography courses

This is a Short Answer Type Questions as classified in NCERT Exemplar

On solving the above equation, the result is 5.4. All non-zeroes digits are significant. The significant figure is 2.

This is a Short Answer Type Questions as classified in NCERT Exemplar

Mass of 1 mole of C-12 = 12g

1 mole contains 6.022×10²³ atoms.

Thus, mass of 6.022×10²³ atoms=12g

 Mass of 1 atom of carbon =126.022×10²³ g
                                         =1.99×10⁻²³ g

Thus, mass of one atom of C-12 is 1.99×10⁻²³ g

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Correction window for AIAPGET 2025 opened on June 10, 2025. Candidates had to edit incorrect details uploaded with AIAPGET 2025 application form. The last date for AIAPGET 2025 correction window was June 12, 2025. Earlier the application window was closed on June 8, 2025. The admit card was released on June 30, 2025. 

This is a Short Answer Type Questions as classified in NCERT Exemplar
Ans: The energy of electrons is determined by the value of n in the hydrogen atom and by n + l in the multielectron atom. Thus for a given principal quantum number the electrons of different orbitals would have different energy.

This is a Long Answer Type Questions as classified in NCERT Exemplar

In AB, 2 g of A combines with 5 g of B.

So, 4 g of A combines with 10 g of B.

In AB₂, 2g of B combines with 10 g of B, So 4g of A combines with 20 g of B.

In A₂B₃ , 4G of B combines with 5 g of B.

In A₂B₃ 4 g of B combined with 15 g of B.

So, the ratio between different masses of B which combine with fixed mass (4g) of A is 10: 20: 5: 15, that is, 2: 4: 1: 3.

Hence, the ratio is simple. Therefore, the law of multiple proportions is applicable.