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Periodic Classification of Elements

10th Class - CBSE - Chemistry - 1615 Questions - 0 Concepts

Important Questions

Q1 Single Correct Hard

Which of the following series correctly represents relations between the elements from X to Y?
$$X \rightarrow Y$$

  • A. $$_6 C \rightarrow _{32} Ge$$ Atomic radii increases
  • B. $$_3Li \rightarrow _{19}K$$ Ionization enthalpy increases
  • C. $$_9F \rightarrow _{35}Br$$ Electron gain enthalpy with negative sign increases
  • D. $$_{18}Ar \rightarrow _{54}Xe$$ Noble character increases

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Q2 Assertion & Reason Hard
ASSERTION

According to Mendeleev, the properties of elements are a periodic function of their atomic weights.

REASON

Mendeleev left the gap under aluminium and a gap under silicon, and called these elements Eka-Aluminium and Eka-Silicon.

  • A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • C. Assertion is correct but Reason is incorrect
  • D. Both Assertion and Reason are incorrect

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Q3 Multiple Correct Hard
Which of the following statement(s) is/are true about the modern form of periodic table?
  • A. Properties of the elements are the periodic functions of their atomic number
  • B. There are 7 periods
  • C. There are 8 groups
  • D. It has separate positions for the isotopes

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Q4 Single Correct Hard
Nuclear attraction is often the deciding control factor for the association of neutral molecules to a given metal ion. Which one of the following represents the correct order of stability of the ions?
$$[Be(H_2O)_4]^{2+}, [Mg(H_2O)_4]^{2+}, [Ca(H_2O)_4]^{2+}$$ and $$[Sr(H_2O)_4]^{2+}$$ 
  • A. $$[Be(H_2O)_4]^{2+} > [Sr(H_2O)_4]^{2+} > [Mg(H_2O)_4]^{2+} > [Ca(H_2O)_4]^{2+}$$
  • B. $$ [Ca(H_2O)_4]^{2+} > [Mg(H_2O)_4]^{2+} > [Be(H_2O)_4]^{2+} > [Sr(H_2O)_4]^{2+}$$
  • C. $$[Sr(H_2O)_4]^{2+} > [Ca(H_2O)_4]^{2+} > [Mg(H_2O)_4]^{2+} > [Be(H_2O)_4]^{2+}$$
  • D. $$[Be(H_2O)_4]^{2+} >[Mg(H_2O)_4]^{2+} > [Ca(H_2O)_4]^{2+} > [Sr(H_2O)_4]^{2+} $$

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Q5 Assertion & Reason Hard
ASSERTION

Metallic character is highest at the extremely left side of the periodic table.

REASON

Ionization enthalpy increases across a period.

  • A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • C. Assertion is correct but Reason is incorrect
  • D. Both Assertion and Reason are incorrect

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Q6 Assertion & Reason Hard
ASSERTION

Boron can only form $$[BF_4]^{-}$$, whereas aluminum forms $$[AlF_{6}]^{3-}$$

REASON

The first member of a group of elements in the $$s-$$ and $$p-$$blocks shows anomalous behavior

  • A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • C. Assertion is correct but Reason is incorrect
  • D. Both Assertion and Reason are incorrect

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1 Verified Answer | Published on 04th 08, 2020

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Q7 Subjective Hard
The modern periodic table has been evolved through the early attempts of Dobereiner, Newland and Mendeleev. List one advantage and one limitation of all the three attempts.

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Q8 Single Correct Hard
The number of unpaired electrons in Ni (atomic number $$=28$$) are _____.
  • A. $$0$$
  • B. $$2$$
  • C. $$4$$
  • D. $$8$$

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Q9 Single Correct Hard
Which one has larger radius:
  • A. $${\text{N}}{{\text{a}}^{\text{ + }}}$$
  • B. $$F$$
  • C. $$O$$
  • D. $$Na$$

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Q10 Single Correct Hard
Consider the following statements.
(I) Rutherford's name was associated with the development of periodic table.
(II) A metal M having electronic configuration $$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{1}$$ is d-block element.
(III) Diamond is an element.
(IV) The electronic configuration of the most electronegative element is $$1s^{2}2s^{2}2p^{5}$$.
The correct statements are :
  • A. I, II, IV
  • B. I, II, III, IV
  • C. II, IV
  • D. I, III, IV

Asked in: Chemistry - Periodic Classification of Elements


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