Q1 · 2020-2020 · 2 marks
For \left[\mathrm{Hg}_{2}\right]^{2+}, the bond order and the orbitals involved in bonding are, respectively
- (a) one; s and s
- (b) two; s and p
- (c) one; p and p
- (d) three; s and d ●●●●●●● CHEMICAL BONDING
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Answer: (c)
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Q2 · June 2019 · 2 marks
Among the following reactions, those that are feasible in liquid \mathrm{NH_3} are (I) \mathrm{KNO_3 + AgCl \rightarrow KCl + AgNO_3} (II) \mathrm{NH_4Br + KNH_2 \rightarrow KBr + 2NH_3} (III) \mathrm{Fe(CO)_5 + 2e^- \rightarrow [Fe(CO)_4]^{2-} + CO}
- (a) I, II and III
- (b) I and II only
- (c) I and III only
- (d) II and III only
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Answer: (a)
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Q3 · June 2019 · 2 marks
The cations formed upon dissolving \mathrm{SnF}_{4} and \mathrm{AuF}_{3} in liquid \mathrm{BrF}_{3} separately, respectively are
- (a) \mathrm{SnF}_{3}^{+} and \mathrm{BrF}_{2}^{+}
- (b) \mathrm{BrF}_{2}^{+} and \mathrm{AuF}_{2}^{+}
- (c) \mathrm{BrF}_{2}^{+} only
- (d) \mathrm{SnF}_{3}^{+} and \mathrm{AuF}_{2}^{+}
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Answer: (c)
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Q4 · June 2019 · 2 marks
The cations formed upon dissolving \mathrm{SnF}_{4} and \mathrm{AuF}_{3} in liquid \mathrm{BrF}_{3} separately, respectively are
- (a) \mathrm{SnF}_{3}^{+}and \mathrm{BrF}_{2}^{+}
- (b) \mathrm{BrF}_{2}^{+}and \mathrm{AuF}_{2}^{+}
- (c) \mathrm{BrF}_{2}^{+}only
- (d) \mathrm{SnF}_{3}^{+}and \mathrm{AuF}_{2}^{+}
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Answer: (c)
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Q5 · Dec 2019 · 2 marks
Among \mathrm{SO_2(OH)F}, \mathrm{CH_3CO_2H}, LiF and \mathrm{H_2O}, the compound(s) which behave(s) as a base in liquid HF is/are
- (a) \mathrm{CH_3CO_2H} and LiF only
- (b) LiF only
- (c) \mathrm{SO_2(OH)F} and LiF only
- (d) \mathrm{CH_3CO_2H}, LiF and \mathrm{H_2O}
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Answer: (b)
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Q6 · Dec 2018 · 2 marks
Consider compounds \mathrm{PF}_{5}, \mathrm{SbF}_{5}, \mathrm{PH}_{3} and \mathrm{SbH}_{3}. The strongest acid and the strongest base among these are, respectively
- (a) \mathrm{PF}_{5} and \mathrm{PH}_{3}
- (b) \mathrm{SbF}_{5} and \mathrm{PH}_{3}
- (c) \mathrm{SbF}_{5} and \mathrm{SbH}_{3}
- (d) \mathrm{PF}_{5} and \mathrm{SbH}_{3}
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Answer: (b)
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Q7 · June 2018 · 2 marks
The transformation are given in Column 1 and reagent in Column II. Match the items of Column I with those of Column II Show answer
Answer: (c)
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Q8 · Dec 2018 · 2 marks
Consider compounds \mathrm{PF}_{5}, \mathrm{SbF}_{5}, \mathrm{PH}_{3} and \mathrm{SbH}_{3}. The strongest acid and the strongest base among these are, respectively
- (a) \mathrm{PF}_{5} and \mathrm{PH}_{3}
- (b) \mathrm{SbF}_{5} and \mathrm{PH}_{3}
- (c) \mathrm{SbF}_{5} and \mathrm{SbH}_{3}
- (d) \mathrm{PF}_{5} and \mathrm{SbH}_{3}
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Answer: (b)
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Q9 · June 2017 · 2 marks
The compound that gives a basic solution in HF is :
- (a) \mathrm{AsF}_{5}
- (b) \mathrm{PF}_{5}
- (c) \mathrm{BF}_{3}
- (d) \mathrm{BrF}_{3}
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Answer: (d)
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Q10 · June 2017 · 2 marks
The compound that gives a basic solution in \mathrm{HF} is :
- (a) \mathrm{AsF}_{5}
- (b) \mathrm{PF}_{5}
- (c) \mathrm{BF}_{3}
- (d) \mathrm{BrF}_{3}
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Answer: (c)
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Q11 · June 2017 · 2 marks
Match items in column A with items in column B: 3 - (a) 1-(A): II-(B); III-(C) IV-(D)
- (b) I-(B); II-(D); III-(C); IV-(A)
- (c) I-(C); II-(D); III-(B); IV-(A)
- (d) I-(B); II-(D); III-(A); IV-(C)
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Answer: (d)
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Q12 · June 2016 · 2 marks
Which of the following react(s) with \mathrm{AsF}_{5} in liquid \mathrm{BrF}_{3} ?
- (a) \mathrm{XeF}_{6} only
- (b) \mathrm{XeF}_{6} and \mathrm{XeF}_{4}
- (c) \mathrm{XeF}_{6} and \mathrm{XeF}_{2}
- (d) \mathrm{XeF}_{4} and \mathrm{XeF}_{2}
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Answer: (c)
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Q13 · Dec 2016 · 2 marks
Some molecules and their properties in liquid ammonia are given in columns A and B respectively. Match column A with column B The correct match is - (a) (A)- (i); (B)- (i); (C)- (iii); (D)-(iv)
- (b) (A)-(i); (B)- (iii); (C)- (iv); (D)- (i)
- (c) (A)-(iii); (B)-(iv); (C)- (i); (D)- (ii)
- (d) (A)-(iv); (B)- (iii); (C)-(ii); (D) - (i)
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Answer: (d)
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Q14 · June 2012 · 2 marks
In the following reactions carried out in liquid \mathrm{NH}_{3} \begin{array}{l} \mathrm{Zn}\left(\mathrm{NH}_{2}\right)_{2}+2 \mathrm{KNH}_{2} \rightarrow \mathrm{~K}_{2}\left[\mathrm{Zn}\left(\mathrm{NH}_{2}\right)_{4}\right] \mathrm{K}_{2}\left[\mathrm{Zn}\left(\mathrm{NH}_{2}\right)_{4}\right]+2 \mathrm{NH}_{4} \mathrm{NO}_{3} \rightarrow \mathrm{Zn}\left(\mathrm{NH}_{2}\right)_{2}+2 \mathrm{KNO}_{3}+4 \mathrm{NH}_{3} \end{array}
\mathrm{KNH}_{2} and \mathrm{NH}_{4} \mathrm{NO}_{3} act respectively as - (a) Solvo-acid and solvo-base
- (b) Solvo-base and solvo-acid
- (c) Conjugate acid and conjugate base
- (d) Conjugate base and conjugate acid
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Answer: (b)
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Q15 · Dec 2011 · 2 marks
The correct order of acidity among the following species is
- (a) \left[\mathrm{Na}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2}>\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2}>\left[\mathrm{Sc}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+3}
- (b) \left[\mathrm{Sc}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+3}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2}>\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2}>\left[\mathrm{Na}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+}
- (c) \left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2}>\left[\mathrm{Sc}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+3}>\left[\mathrm{Na}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+}
- (d) \left[\mathrm{Sc}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+3}>\left[\mathrm{Na}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+}>\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2}>\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{+2}
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Answer: (b)
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