Q1 · 2001-2022 · 2 marks
The most probable oxidation states for both Cr and Mo are
- (a) +2, +3, +4
- (b) +2, +3, +5
- (c) +2, +3, +6
- (d) +3, +4, +5 IIT JAM 2012
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Answer: (c)
IIT-JAM Chemistry — Acids, Bases, Periodic Properties and d-Block previous year questions
22 questions · 2001–2005 · all with verified answer · last checked 2026-11-06
Q2 · 2005-2022 · 2 marks
1 me manistion 111 etal hionoxiue mal siiows hietanic coniucitaty is.
- (a) NiO
- (b) MnO
- (c) TiO
- (d) CoO
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Answer: (c)
Q3 · 2005-2022 · 2 marks
The metal that is extracted by the reduction method is:
- (a) Al
- (b) Au
- (c) Hg
- (d) Mg
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Answer: (c)
Q4 · 2005-2022 · 2 marks
The compound formed by dissolving elemental gold in aqua regia is:
- (a) AuCl
- (b) \mathrm{AuNO}_{3}
- (c) \mathrm{H}\left[\mathrm{AuCl}_{4}\right]
- (d) \mathrm{H}\left[\mathrm{Au}\left(\mathrm{NO}_{3}\right)_{4}\right]
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Answer: (c)
Q5 · 2001-2022 · 2 marks
Number of moles of ions produced by complete dissociation of one mole of Mohr's salt in water is
- (a) 3
- (b) 4
- (c) 5
- (d) 6 IIT JAM 2016
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Answer: (c)
Q6 · 2005-2022 · 2 marks
A filter paper moistioned with ammonical sodium nitroprusside solution turns violet on contact with a drop of alkaline \mathrm{Na}_{2} \mathrm{~S} solution. The violet colour is due to the formation of
- (a) \left[\mathrm{Fe}(\mathrm{SCN})_{5}(\mathrm{NO})\right]^{-}
- (b) \left[\mathrm{Fe}(\mathrm{SCN})_{5}(\mathrm{NO})\right]^{2-}
- (c) \left[\mathrm{Fe}(\mathrm{CN})_{5}(\mathrm{NOS})\right]^{3-}
- (d) \left[\mathrm{Fe}(\mathrm{CN})_{5}(\mathrm{NOS})\right]^{4-} IIT JAM-2013
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Answer: (d)
Q7 · 2005-2022 · 2 marks
Among the following, the ligand that BEST stabilizes low oxidation state of tungsten (W) is
- (a) \mathrm{H_2O}
- (b) \mathrm{NH_3}
- (c) CO
- (d) \mathrm{F^-}
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Answer: (b)
Q8 · 2005-2022 · 2 marks
A yellow precipitate is formed upon addition of aqueous \mathrm{AgNO}_{3} to a solution of
- (a) phosphite
- (b) pyrophosphate
- (c) metaphosphate
- (d) orthophosphate
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Answer: (d)
Q9 · 2005-2022 · 2 marks
In qualitative inorganic analysis of metal ions, the ion which precipitates as sulfide in the presence of \mathrm{H}_{2} \mathrm{~S} in warm dilute HCl is
- (a) \mathrm{Cr}^{3+}
- (b) \mathrm{Al}^{3+}
- (c) \mathrm{Co}^{2+}
- (d) \mathrm{Bi}^{3+}
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Answer: (d)
Q10 · 2005-2022 · 2 marks
For \mathrm{Na}^{+}, \mathrm{Mg}^{2+}, \mathrm{Al}^{3+} and \mathrm{F}^{-}, the CORRECT order of ionic radii is
- (a) \mathrm{Al}^{3+}>\mathrm{Mg}^{2+}>\mathrm{Na}^{+}>\mathrm{F}^{-}
- (b) \mathrm{Al}^{3+}>\mathrm{Na}^{+}>\mathrm{Mg}^{2+}>\mathrm{F}^{-}
- (c) \mathrm{Na}^{+}>\mathrm{F}^{-}>\mathrm{Mg}^{2+}>\mathrm{Al}^{3+}
- (d) \mathrm{F}^{-}>\mathrm{Na}^{+}>\mathrm{Mg}^{2+}>\mathrm{Al}^{3+}
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Answer: (d)
Q11 · 2005-2022 · 2 marks
With respect to periodic properties, the CORRECT statement is
- (a) Electron affinity order is \mathrm{F}>\mathrm{O}>\mathrm{Cl}
- (b) First ionisation energy order is \mathrm{Al}>\mathrm{Mg}>\mathrm{K}
- (c) Atomic radius order is \mathrm{N}>\mathrm{P}> As
- (d) Ionic radius order is \mathrm{K}^{+}>\mathrm{Ca}^{2+}>\mathrm{Mg}^{2+}
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Answer: (d)
Q12 · 2005-2022 · 2 marks
The correct order of the boiling points of the compounds is
- (a) \mathrm{CH}_{4}>\mathrm{SiH}_{4}>\mathrm{SnH}_{4}>\mathrm{GeH}_{4}
- (b) \mathrm{SiH}_{4}>\mathrm{CH}_{4}>\mathrm{GeH}_{4}>\mathrm{SnH}_{4}
- (c) \mathrm{SnH}_{4}>\mathrm{GeH}_{4}>\mathrm{CH}_{4}>\mathrm{SiH}_{4}
- (d) \mathrm{SnH}_{4}>\mathrm{GeH}_{4}>\mathrm{SiH}_{4}>\mathrm{CH}_{4} IIT JAM 2016
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Answer: (d)
Q13 · 2005-2022 · 2 marks
Among the following, the compound that has the lowest degree of ionic character is
- (a) NaCl
- (b) \mathrm{MgCl}_{2}
- (c) \mathrm{AlCl}_{3}
- (d) \mathrm{CaCl}_{2} IIT JAM 2015
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Answer: (c)
Q14 · 2001-2022 · 2 marks
The energy of an electron in a hydrogenic atom with nuclear charge Z varies as:
- (a) Z
- (b) \mathrm{Z}^{2}
- (c) 1 / \mathrm{Z}
- (d) 1 / Z^{2}
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Answer: (b)
Q15 · 2005-2022 · 2 marks
Among the following, the element having maximum inert pair effect is [Given: Atomic number of Ge = 30, Pb = 82, Si = 14 and Sn = 50]
- (a) Ge
- (b) Pb
- (c) Si
- (d) Sn
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Answer: (c)
Q16 · 2005-2022 · 2 marks
The correct order of acidic character is:
- (a) \mathrm{Al}_{2} \mathrm{O}_{3}>\mathrm{MgO}>\mathrm{SiO}_{2}>\mathrm{P}_{4} \mathrm{O}_{10}
- (b) \mathrm{P}_{4} \mathrm{O}_{10}>\mathrm{Al}_{2} \mathrm{O}_{3}>\mathrm{MgO}>\mathrm{SiO}_{2}
- (c) \mathrm{P}_{4} \mathrm{O}_{10}>\mathrm{SiO}_{2}>\mathrm{Al}_{2} \mathrm{O}_{3}>\mathrm{MgO}
- (d) \mathrm{SiO}_{2}>\mathrm{P}_{4} \mathrm{O}_{10}>\mathrm{Al}_{2} \mathrm{O}_{3}>\mathrm{MgO} IIT JAM 2010
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Answer: (c)
Q17 · 2005-2022 · 2 marks
Among lithium, nitrogen, carbon and oxygen, which element has the highest first ionization potential?
- (a) Lithium
- (b) Nitrogen
- (c) Carbon
- (d) Oxygen
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Answer: (b)
Q18 · 2005-2022 · 2 marks
Identify the correct option: In the periodic table, on moving from left to right along a period,
- (a) The atomic size of the element increases.
- (b) The first ionization potential of the element decreases.
- (c) The oxide of the element becomes less basic
- (d) The oxide of the element becomes more basic. IIT JAM 2008
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Answer: (c)
Q19 · 2005-2022 · 2 marks
The decreasing order of the first ionization energy of the following element is
- (a) He > H > Be > B
- (b) \mathrm{Be}>\mathrm{B}>\mathrm{H}>\mathrm{He}
- (c) \mathrm{H}>\mathrm{He}>\mathrm{Be}>\mathrm{B}
- (d) \mathrm{B}>\mathrm{Be}>\mathrm{He}>\mathrm{H}
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Answer: (a)
Q20 · 2005-2022 · 2 marks
The decreasing order of ionic nature of the following compound is:
- (a) LiI > NaBr > KCl > CsF
- (b) \mathrm{LiI}>\mathrm{KCl}>\mathrm{NaBr}>\mathrm{CsF}
- (c) \mathrm{CsF}>\mathrm{NaBr}>\mathrm{KCl}>\mathrm{LiI}
- (d) \mathrm{CsF}>\mathrm{KCl}>\mathrm{NaBr}>\mathrm{LiI} IIT JAM 2005
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Answer: (d)
Q21 · 2005-2022 · 2 marks
The compound having the highest melting point is:
- (a) LiCl
- (b) LiF
- (c) LiI
- (d) LiBr
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Answer: (b)
Q22 · 2005-2022 · 2 marks
The decreasing order of the first ionization energy of the following elements is:
- (a) \mathrm{Xe}>\mathrm{Be}>\mathrm{As}>\mathrm{Al}
- (b) \mathrm{Xe}>\mathrm{As}>\mathrm{Al}>\mathrm{Be}
- (c) \mathrm{Xe}>\mathrm{As}>\mathrm{Be}>\mathrm{Al}
- (d) \mathrm{Xe}>\mathrm{Be}>\mathrm{Al}>\mathrm{As}
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Answer: (c)
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