UP Board Class 11 Chemistry Chapter 3 Classification Of Elements And Periodicity In Properties Multiple Choice Questions

UP Board Class 11 Chemistry Chapter 3 Classification Of Elements And Periodicity In Properties Multiple Choice Questions

Question 1. The atomic number of the inert gas in which the total number of d -electrons is equal to the difference in the numbers of total p -and s -electrons is-

1. 18
2. 36
3. 54
4. 86

Answer: 2. 36

Question 2. The element with atomic number 118 has been discovered recently. Which of the following is not expected for this element

1. It is a radioactive and unstable element
2. It is a solid at room temperature
3. Its ionization enthalpy is minimal in the group
4. It has a 7s²7p⁶ outer shell configuration

Answer: 2. It is a solid at room temperature

Question 3. Which occupy the peak of the atomic volume curve

1. Transition Elements
2. Halogens
3. Alkali Metals
4. Alkaline earth metals

Answer: 3. Alkali Metals

Question 4. The ionization energy will be the maximum for the process

1. Ba → Ba²⁺
2. Be → Be²⁺
3. Cs → Cs⁺
4. Li → Li⁺

Answer: 2. Be → Be²⁺

Question 5. The correct order of second ionization potential of carbon, nitrogen, oxygen, and fluorine is

1. C>N>O>F
2. O>N>F>C
3. O>F>N>C^–
4. F>O>N>C

Answer: 3. O>F>N>C^–

Question 6. The most reactive metal is

1. Na
2. Fe
3. Hg
4. Cs

Answer: 4. Cs

Question 7. You are given Avogadro’s number of atoms of a gas X. If the atoms are converted into X+(g) by energy AH, then the ionization enthalpy of X is

1. \(\frac{2 \Delta H}{N_A}\)
2. \(\frac{2 N_A}{\Delta H}\)
3. \(\frac{\Delta H}{2 N_A}\)
4. \(\frac{N_A}{\Delta H}\)

Answer: 1. \(\frac{2 \Delta H}{N_A}\)

Question 8. The second electron affinity of oxygen is +744 kj.mol-1 then the second electron affinity of sulphur is

1. -200kj mol^-1
2. +450 kj – mol^-1
3. +800 kj – mol^-1
4. 1200 kl – mol^-1

Answer: 2. +450 kj – mol^-1

Question 9. What would be the atomic number of the next halogen if discovered in the future—

1. 116
2. 117
3. 118
4. 119

Answer: 2. 117

Question 10. An element belongs to group 17 and the fourth period of the periodic table. Which of the following properties will be shown by the element?

1. Gaseous, non-metallic
2. Liquid, non-metallic
3. Solid, non-metallic
4. Solid, metallic

Answer: 2. Liquid, non-metallic

Question 11. Five successive ionization enthalpies of an element are 800, 2427, 3638, 25024 & 32824kj. mol^-1 respectively. The number of valence electrons ofthe element is

1. 3
2. 5
3. 4
4. 2

Answer: 1. 3

Question 12. Choose the correct set of ionic radii among the following

1. Ti⁴⁺<Mn⁷⁺
2. ³⁵Cl^–<³⁷Cl^–
3. P³⁺>P⁵⁺
4. K⁺>Cl^–

Answer: 3. p³⁺>p⁵⁺

Question 13. Electron affinity( kj.mol^-1 ) of three halogens X, Y, and Z are -349, -333, and -325. X, Y, and Z are respectively.

1. F₂, Cl₂ and Br2
2. Cl₂, F₂ and Br₂
3. Br₂, Cl₂ and F₂
4. Br₂, F₂ and Cl₂

Answer: 1. F₂, Cl₂ and Br₂

Question 14. The correct order of ionic radii is

1. N^3- > O^2- >F^– > Na⁺
2. N^3- > Na⁺> O^2- >F^–
3. Na³⁺ > O^2- > N^3- >F^–
4. O^2- > F^–> Na²⁺ > N^3-

Answer: 1. N^3- > O^2- > F^– > Na⁺

Question 15. The ionization enthalpy of lithium is 520 kj. mol^-1. The amount required to convert 210 mg of -atoms in a gaseous state into Li+ ions is

1. -520kj
2. -173.3 kj
3. 2.47 kj
4. 15.60 kj

Answer: 4. 15.60 kj

Question 16. Electronic configuration ls²2s²2p⁶3s²3p⁶3d⁹ indicates

1. Mentalization
2. Non-metal atom
3. Non-mental anion
4. Mental atom

Answer: 1. Mentalcation

Question 17. In the periodic table metals used as catalysts belong to

1. F-block
2. d- block
3. p-block
4. s-block

Answer: 2. d- block

Question 18. The oxide of an element having configuration [Ne]3s¹ is

1. Amphoteric
2. Basic
3. Acidic
4. Neutral

Answer: 2. Basic

Question 19. Which one of the following orders is not by the property stated against it

1. F > Cl > Br >I : Oxidisingpower
2. F >Cl > Br >l : Electronegativity
3. F-F > Cl-Cl > Br-Br > I-I: Bond dissociation energy
4. HI > HBr > HCl > HF: Acidic property in water

Answer: 3. F-F > Cl-Cl > Br-Br > I-I: Bond dissociation energy

Question 20. In which of the following process energy is absorbed

1. F→F^–
2. H→h^–
3. Cl→cl^–
4. O→O^2-

Answer: 4. O→O^2-

Question 21. In which of the following pairs do both the metals have identical values of metallic radii

1. Ag and Au
2. Cu And Ag
3. Cu and Zn
4. Zn and Hg

Answer: 1. Ag and Au

Question 22. In which of the following pairs the difference between the covalent radii ofthe two metals is maximum

1. K, Ca
2. Mn, Fe
3. Co, Ni
4. Cr, Mn

Answer: 1. K, Ca

Question 23. The increasing order of the first ionization enthalpies of the elements B, P, S, and F is—

1. F<S<P<B
2. P<S<B<F
3. B<P<S<F
4. B<S<P<F

Answer: 4. B<S<P<F

Question 24. Which group of atoms have nearly the same atomic radius

1. Na, K, Rb, Cs
2. Li, Be, B, C
3. Fe, Co, Ni, Cu
4. F, Cl, Br, I

Answer: 3. Fe, Co, Ni, Cu

Question 25. The lattice energy is highest for

1. CsF
2. RbF
3. NaF
4. KF

Answer: 3. NaF

Question 26. The correct order of lattice energy for lithium halides is-

1. Li > LiBr > LiCl > LiF
2. LiCl > LiF > LiBr > Lil
3. LiBr > LiCl > Lil > LiF
4. LiF > LiCl > LiBr > Lil

Answer: 4. LiF > LiCl > LiBr > Lil

Question 27. An element with atomic number 20 is most likely to combine with the element whose atomic number is

1. 11
2. 16
3. 18
4. 10

Answer: 2. 16

Question 28. K⁺, Cl^–, Ca²⁺, and S^2- ions are isoelectronic. The decreasing order of their size is

1. S^2- > Cl- > K⁺> Ca²⁺
2. Ca²⁺ > K⁺> Cl^– > S^2-
3. K⁺  >Cl^–> Ca²⁺ >S^2-
4. Cl^– > S^2->Ca²⁺ >K⁺

Answer: 1. S^2-> Cl^– > K⁺ > Ca²⁺

Question 29. Which ofthe following oxides of Cr is amphoteric

1. CrO
2. CrO₃
3. Cr₂O₃
4. None of the theses

Answer: 3. Cr₂O₃

Question 30. The element with atomic number 118 has been discovered recently. In the periodic table, the element will occupy its position in the family of

1. Halogens
2. Insert gases
3. Chalcogens
4. Alkaline earth metals

Answer: 2. Insert gases

Question 31. In the relation, Electronegativity \(=\frac{0.359 Z_{\text {eff }}}{r^2}+0.744, r \text { is }\)

1. Ionic radius
2. Metallic radius
3. Van der Waals radius
4. Covalent radius

Answer: 4. Covalent radius

Question 32. Select the endothermic processes

1. H→H^–
2. O→ O^2-
3. Cr³⁺
4. Ar→Ar+

Answer: 2. O→O^2-

Question 33. Which of the following sequences contain the atomic number of only representative elements

1. 3,33,53,87
2. 7,17,25,37,48
3. 2,10,22,86
4. 9,35,51,88

Answer: 1. 3,33,53,87

Question 34. Which of the given elements will gain one electron more readily in comparison to other elements of their group

1. S
2. Na
3. O
4. Cl

Answer: 1. S

Question 35. MgSO₄ is soluble in water but BaSO₄ is not because

1. The hydration enthalpy of MgSO₄ is more than its lattice enthalpy
2. The lattice enthalpy of MgSO₄ is greater than its hydration enthalpy
3. The lattice enthalpy of BaSO₄ is greater than its hydration enthalpy
4. The hydration enthalpy of BaSO₄ is greater., than its lattice enthalpy

Answer: 1. The hydration enthalpy of MgSO₄ is more than its lattice enthalpy

Question 36. Consider the following ionization steps

• M(g)→M⁺(g) + e^–; ΔH = 100 eV
• M(g)→M²⁺(g) + 2e^–; ΔH = 250 eV

Select the correct statements

1. Δ_iH₁ofM(g) =100eV
2. Δ_iH₁ of M+(g) =150 eV
3. Δ_iH₂ of M(g)=250eV
4. Δ_iH₂ of M(g)=150 eV

Answer: 1. 1,2,4

Question 37. In which of the following sets of atomic numbers, all elements are in the same group—

1. 8,16,24
2. 3,11,37
3. 12,38,56
4. 10,18,54

Answer: 2. 3,11,37

Question 38. Which of the following elements are artificially made and do not exist in nature

1. Bi
2. Ge
3. Tc
4. At

Answer: 3. Tc

Question 39. Choose the pairs in which the IEX of the first element is greater than the IEl of the second element but in the case of IE₂ order is reversed

1. P, S
2. F, O
3. Mg, Al
4. N, O

Answer: 1. P, S

Question 40. Which ofthe following ions can form complexes

1. Al³⁺
2. Cu²⁺
3. Cr³⁺
4. Fe²⁺

Answer: 1. Al³⁺

Question 41. Which ofthe following pairs contain metalloid

1. In, Tl
2. Ge, Ga
3. As, Te
4. I, Bi

Answer: 2. Ge, Ga

Question 42. Which of the following elements exist in a liquid state at room temperature

1. Selenium
2. Germanium
3. Cesium
4. Gallium

Answer: 2. Germanium

Question 43. Which of the following elements can form two or more chlorides

1. Cu
2. Vs
3. Hg
4. Cs

Answer: 1. Cu

Question 44. Which of the following hydrides rarely show basic properties

1. PH₂
2. SbH₃
3. AsH₃
4. BiH₃

Answer: 2. SbH₃

Question 45. The correct sequences of increasing electropositive character are

1. Fe<Cu<Mg
2. Cu < Fe < Mg
3. Cs < Ca < Sr
4. Ca<Sr<Cs

Answer: 2. Cu < Fe < Mg

Question 46. Select the correct sequence of electron-gain enthalpy

1. S > Se > O
2. Cl > F >I
3. F > Cl >I
4. S > O > Se

Answer: 3. F > Cl >I

Question 47. The correct orders of electronegativity are

1. C < Si < P < N
2. Si < P < C < N
3. P < Se < S < N
4. S < P < Se < N

Answer: 3. P < Se < S < N

Question 48. Among which of the following pairs of elements, the first has lesser ionization energy than the second

1. Na, K
2. N, O
3. B, Be
4. Br, I

Answer: 3. B, Be

Question 49. Which of the given elements has the lowest electron affinity

1. C
2. P
3. O
4. S

Answer: 2. P

Question 50. Which of the following atoms has the highest first ionization energy

1. Rb
2. Na
3. K
4. Sc

Answer: 4. Sc