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Bihar Board Class 10 (BSEB) Hydrogen — practice questions

Explore 7 free Hydrogen questions in Bihar Board Class 10 (BSEB) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Hydrogen questions and exercises with answers

Showing questions 1–7 of 7.

Mendeleev arranged elements primarily in order of:Read the answer and worked solution →Sodium (atomic number 11) belongs to which group and period?Read the answer and worked solution →Which trend is followed by ionisation energy across a period?Read the answer and worked solution →Which of the following elements would lose an electron easily?Read the answer and worked solution →What type of oxide would Eka-aluminium form?Read the answer and worked solution →Three elements B, Si and Ge areRead the answer and worked solution →Which of the following elements will form an acidic oxide?Read the answer and worked solution →

Worked practice questions

Mendeleev arranged elements primarily in order of:

  1. Atomic mass
  2. Atomic number
  3. Atomic radius
  4. Density
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Correct answer: A. Atomic mass

1. Mendeleev's periodic table predates the modern one. 2. He used the increasing atomic masses of the elements he knew. 3. He left gaps for undiscovered elements (eka-aluminium, eka-silicon, etc.). 4. Atomic number became the basis only after Moseley. 5. So the original Mendeleev arrangement used atomic mass. _Source: syllabus Science Ch 5 'Periodic Classification of Elements'_

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Sodium (atomic number 11) belongs to which group and period?

  1. Group 11, period 4
  2. Group 2, period 3
  3. Group 1, period 2
  4. Group 1, period 3
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Correct answer: D. Group 1, period 3

1. Sodium has electronic configuration 2, 8, 1. 2. Three electron shells place it in period 3. 3. One valence electron places it in Group 1. 4. So sodium is in Group 1, period 3. 5. Sodium is the second alkali metal after lithium. _Source: syllabus Science Ch 5 'Periodic Classification of Elements'_

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Which trend is followed by ionisation energy across a period?

  1. Continuously increases
  2. Generally increases with some dips
  3. Continuously decreases
  4. Has no clear pattern in the standard view
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Correct answer: B. Generally increases with some dips

1. Ionisation energy rises with nuclear charge across a period. 2. There are exceptions where the configuration is especially stable. 3. Group 13 dips below Group 2; Group 16 dips below Group 15. 4. So the trend is rising overall with small dips at known positions. 5. Hence the general statement 'increases with some dips' is correct. _Source: syllabus Science Ch 5 'Periodic Classification of Elements'_

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More Chemistry topics

Carbon and its CompoundsPeriodic Classification of ElementsMetals and Non-metalsAlcohols Phenols EthersAldehydes KetonesAlkenesChemical EquilibriumClassification of Elements and Periodicity