Inorganic Chemistry Quiz

1 >>What kind of transition in the H Balmer series of H atom would have shortest λ? ?

(A) n₁ = 2, n₂ = 3
(B) n₁ = 2, n₂ = 4
(C) n₁ = 2, n₂ = ∞
(D) n₁ = 2, n₂ = 0

2 >>The ionisation energy of H atom is 13.6 eV. The ionisation energy of Li⁺² ion will be: ?

(A) 54.4 eV
(B) 122.4 eV
(C) 13.6 eV
(D) 27.2 eV

3 >>The ratio of radii of Bohr′s 3^rd and 4^th orbits in H atom are: ?

(A) 3:4
(B) 3:8
(C) 9:16
(D) 8:9

4 >>Ionisation energy of Na atom is 4.946 x 10² kJ⁄mol. The wavelength of radiation sufficient to ionise Na atom is: ?

(A) 4 x 10²⁴ nm
(B) 0.241 nm
(C) 241 nm
(D) 400 nm

5 >>A 0.66 kg ball is moving with a speed of 100 m⁄s. The associated wavelength will be: ?

(A) 6.6 x 10⁻³² m
(B) 1.0 x 10⁻³⁵ m
(C) 6.6 x 10⁻³⁴ m
(D) 1.0 x 10⁻³² m

6 >>According to Bohr theory, the angular momentum of an electron in 5^th orbit is: ?

(A) 25h ⁄ π
(B) h ⁄ π
(C) 10h ⁄ π
(D) 2.5h ⁄ π

7 >>The ratio of ionisation energy of He and Be³⁺ is: ?

(A) 01:01
(B) 01:03
(C) 01:09
(D) 01:16

8 >>The wavelengths of electron waves in 2 orbits is 3 : 5. The ratio of kinetic energy of electrons will be: ?

(A)25:09
(B) 05:03
(C) 09:25
(D) 03:05

9 >>Correct order of polarizing power is: ?

(A) Cs⁺ < K⁺ < Mg²⁺ < Al³⁺
(B) Al³⁺ < Mg²⁺ < K⁺ < Cs⁺
(C) Mg²⁺ < Al³⁺ < K⁺ < Cs⁺
(D) K⁺ < Cs⁺ < Mg²⁺ < Al³⁺

10 >>Which of the following is the correct increasing order of their ionic mobilities in aqueous medium? ?

(A) Li⁺ < K⁺ < Na⁺
(B) Na⁺ < Mg²⁺ < Al³⁺
(C) K⁺ < Na⁺ < Li⁺
(D) Al³⁺ < Mg²⁺ < Na⁺

11 >>Formula of stable halide which may be formed by element with Z = 114 will be: ?

(A) MX
(B) MX₂
(C) MX₃
(D) MX₄

12 >>The first four IE of an element A are 300 kJ, 500 kJ, 8000 kJ and 10000 kJ respectively. Similarly the first three EA of an element B are −1000 kJ, 100 kJ and 500 kJ respectively. What will be the formula of compound formed by A and B? ?

(A) AB
(B) A₂B
(C) AB₂
(D) AB₃

13 >>Solutions of equal strength of XOH nad QOH are prepared. The ionisation potential of X and Q are 5.1 and 13.0 eV respectively, whereas their electronegativities are 0.9 and 3.2. Spot the incorrect conclusion: ?

(A) Reaction of XOH and NH₄Cl will produce NH₃
(B) Solution of QOH will give effervescence with NaHCO₃
(C) Phenolphthalein will give pink colour with XOH solution
(D) The pH of QOH solution will be more than 7

14 >>The first five IPs of an element are 7.1, 14.3, 34.5, 46.8 and 162.2 eV respectively. The element is likely to be: ?

(A) Na
(B) Si
(C) F
(D) Ca

15 >>The atomic number of 3 elements A, B and C are x, x+1 and x+2. C is an alkali metal. In a compound of A and C, the nature of bond is: ?

(A) Coordinate
(B) Covalent
(C) Ionic
(D) Metallic

16 >>Which of the following relations is correct? ?

(A) 2 IP − EA − EN = 0
(B) 2 IP − EN + EA = 0
(C) 2 EN − IP − EA = 0
(D) EN − IP − EA = 0

17 >>The IE of Li is 520 kJ⁄mol. The amount of energy required to convert 70 mg of Li atoms in gaseous state into Li⁺ ions is: ?

(A) 5.2 kJ
(B) 52 kJ
(C) 520 kJ
(D) 52 J

18 >>The lanthanide contraction is responsible for the fact that: ?

(A) Zr and Hf have about the same radius
(B) Zr and Y have about the same radius
(C) Zn and Nb have same oxidation state
(D) Zr and Zn have same oxidation state

19 >>Which is NOT the correct order for the stated property? ?

(A) Ba > Sr > Mg (Atomic radius)
(B) F > O > N (First IE)
(C) Cl > F > I (EA)
(D) O > Se > Te (Electronegativity)

20 >>What is the magentic moment of K₃[FeF₆]? ?

(A) 3.87 BM
(B) 4.89 BM
(C) 5.91 BM
(D) 6.92 BM

21 >>The ∠HSH in H₂S is 92^o. It infers to: ?

(A) S is sp³ hybridised
(B) Lonepair−lonepair repulsion is greater than bondpair−bondpair repulsion
(C) The bonds are more or less purely p type
(D) The bondpair−bondpair repulsion is high enough due to larger size of S

22 >>Which compound has the maximum covalent character? ?

(A) LiCl
(B) NaCl
(C) KCl
(D) CsCl

23 >>The geometry of AlF₆³⁻ is: ?

(A) Tetrahedral
(B) Hexagonal
(C) Pyramidal
(D) Octahedral

24 >>The type of hybridisation of Xe in XeF₆ will be the same as that of the central atom of: ?

(A) PCl₅
(B) SF₆
(C) IF₇
(D) CCl₄

25 >>The order of increasing polarity is: ?

(A) CO₂, HCl, H₂O, HF
(B) HF, H₂O, HCl, CO₂
(C) CO₂, HCl, HF, H₂O
(D) CO₂, HF, H₂O, HCl

26 >>In which of the following, there exists a pπ−dπ bond? ?

(A) Graphite
(B) Diamond
(C) Dimethyl amine
(D) Trisilylamine

27 >>Number of sigma bonds in P₄O₁₀ is: ?

(A) 6
(B) 9
(C) 16
(D) 20

28 >>CaO and NaCl have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of NaCl, the approximate energy of NaCl is: ?

(A) U
(B) 2U
(C) 4U
(D) U ⁄ 2

29 >>CH₃⁻ is an isostere of: ?

(A) CH₄
(B) NH₃
(C) BH₃
(D) CH₃⁺

30 >>The nature of π bond in perchlorate ion is: ?

(A) O (dπ) − Cl (pπ)
(B) O (pπ) − Cl (dπ)
(C) O (dπ) − Cl (dπ)
(D) O (pπ) − Cl (pπ)

31 >>In the anion HCOO⁻, the 2 C−O bonds are found to be of equal length. What is the reason for it? ?

(A) Electronic orbitals of C atoms are hybridised
(B) The C=O bond is weaker than the C−O bond
(C) The anion HCOO⁻ has 2 resonating structures
(D) The anion is obtained by removal of a proton from the acid molecule

32 >>The hybridisation of P in PO₄³⁻ is the same as in: ?

(A) I in ICl₄⁻
(B) S in SO₃
(C) N in NO₃⁻
(D) S in SO₄²⁻

33 >>Which one is a planar molecule? ?

(A) XeO₄
(B) XeO₃F
(C) XeO₂F₂
(D) XeF₄

34 >>The linear structure is possessed by: ?

(A) SnCl₂
(B) NCO⁻
(C) NO₂⁺
(D) CS₂

35 >>In which process does the bond order increase and magnetic behaviour change? ?

(A) N₂ → N₂⁺
(B) C₂ → C₂⁺
(C) NO → NO⁺
(D) O₂ → O₂⁺

36 >>Which has zero dipole moment? ?

(A) ClF
(B) PCl₃
(C) SiF₄
(D) AgBr

37 >>Which of the following possesses maximum hydration energy? ?

(A) MgSO₄
(B) RaSO₄
(C) SrSO₄
(D) BaSO₄

38 >>The structure of ICl₂⁻ is: ?

(A) Trigonal
(B) Octahedral
(C) Square planar
(D) Distorted trigonal bipyramid

39 >>Which species has the maximum number of lone pair of electrons on the central atom? ?

(A) ClO₃⁻
(B) XeF₄
(C) SF₄
(D) I₃⁻

40 >>Hydrogen bond is strongest in: ?

(A) S−H−O
(B) O−H−S
(C) F−H−F
(D) O−H−N

41 >>The nodal plane in the π bond of ethene is located in: ?

(A) The molecular plane
(B) A plane parallel to the molecular plane
(C) A plane perpendicular to the molecular plane which bisects the C−C σ bond at right angle
(D) A plane perpendicular to the molecular plane which contains the C−C bond

42 >>The pair of species having identical shapes are: ?

(A) CF₄, SF₄
(B) XeF₂, CO₂
(C) BF₃, PCl₃
(D) PF₅, IF₅

43 >>Which one of the following species is diamagnetic in nature? ?

(A) H₂⁻
(B) H₂
(C) H₂⁺
(D) He₂⁺

44 >>Which of the following carbonates does not dissociate on heating? ?

(A) Li₂CO₃
(B) K₂CO₃
(C) MgCO₃
(D) CaCO₃

45 >>Which of the following bicarbonates are obtained in solid state? ?

(A) NaHCO₃
(B) LiHCO₃
(C) Ca(HCO₃)₂
(D) All of these

.46 >>The alkali metals form salt like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decrease in which of the following order? ?

(A) NaH > LiH > KH > RbH > CsH
(B) LiH > NaH > KH > RbH > CsH
(C) CsH > RbH > KH > NaH > LiH
(D) KH > NaH > LiH > CsH > RbH

47 >>As compared to lithium, sodium reacts quickly with water because: ?

(A) Its molecular weight is less
(B) It is more electronegative
(C) It is more electro-positive
(D) It is a metal

48 >>Which of the following on thermal decomposition yields a basic as well as an acidic oxide? ?

(A) NaNO₃
(B) KClO₃
(C) CaCO₃
(D) NH₄NO₃

49 >>The compound exhibiting maximum value of equivalent conductance in a fused state is: ?

(A) SrCl₂
(B) CaCl₂
(C) MgCl₂
(D) BeCl₂

50 >>Arrange in the decreasing order of first ionisation enthalpy: ?

(A) Mg, Ca, Sr, Ba
(B) Ca, Sr, Ba, Mg
(C) Sr, Ba, Mg, Ca
(D) Ba, Mg, Ca, Sr

51 >>What is the correct order of increasing basic strength? ?

(A) MgO < BeO < CaO < BaO
(B) BeO < MgO < CaO < BaO
(C) BaO < CaO < MgO < BeO
(D) CaO < BaO < BeO < MgO

52 >>Which of the following compounds of cement sets at the slowest rate? ?

(A) Dicalcium silicate
(B) Tricalcium silicate
(C) Tricalcium aluminate
(D) Tetracalcium aluminoferrite

53 >>Which of the following is used as a scavenger in metallurgy? ?

(A) Na
(B) K
(C) Ca
(D) Zn

54 >>Carbon can not be used in the extraction of Al₂O₃ because: ?

(A) Pure carbon is not easily available
(B) The enthalpy of formation of CO₂ is more than that of Al₂O₃
(C) It is an expensive proposition
(D) The enthalpy of formation of Al₂O₃ is very high

55 >>A salt when reacts with dil. H₂SO₄, evolves a gas which turns lime water milky and has bleaching property. The gas evolved is: ?

(A) CO
(B) CO₂
(C) SO₂
(D) SO₃

56 >>Aqua fortis is: ?

(A) HNO₃
(B) H₃PO₃
(C) HPO₃
(D) HNO₂

57 >>Reactivity of borazole is greater than that of benzene because: ?

(A) It has localized electron in it
(B) Borazole is electron deficient compound
(C) Borazole is polar compound
(D) Borazole is non polar compound

58 >>The maximum percentage of available chlorine on the basis of CaOCl₂.H₂O formula is: ?

(A) 40
(B) 35
(C) 49
(D) 45

59 >>The soldiers of Napoleon army, while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to: ?