IIST entrance exam Chemistry Solved Paper - 2018-2019 StudyChaCha

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Old January 7th, 2014, 12:45 PM
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Default IIST entrance exam Chemistry Solved Paper

Will you please provide here the IIST entrance exam Chemistry Solved Paper?
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Old January 8th, 2014, 10:28 AM
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Default Re: IIST entrance exam Chemistry Solved Paper

The IIST entrance exam Chemistry questions are below:

Which one of the following is the correct statement?
i. Chlorides of both beryllium and aluminium have bridged chloride structures in solid phase.
ii. B2H6.2NH3 is known as 'inorganic benzene'.
iii. Boric acid is a protonic acid.
iv. Beryllium exhibits coordination number of six.

The pKa of a weak acid, HA is 4.80. The pKb of a weak base, BOH, is 4.78. The pH of an aqueous solution of
the corresponding salt, BA, will be
i. 7.01
ii. 9.22
iii. 9.58
iv. 4.79

Amount of oxalic acid present in a solution can be determined by its titration with KMnO4solution in the
presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl
i. reduces permanganate to Mn2+.
ii. oxidises oxalic acid to carbon dioxide and water.
iii. gets oxidised by oxalic acid to chlorine.
iv. furnishes H+ ions in addition to those from oxalic acid.

Among the following substituted silanes the one which will give rise to cross linked silicone polymer on
hydrolysis is
i. R2SiCl2
ii. R3SiCl
iii. R4Si
iv. RSiCl3

Which of the following factors is of no significance for roasting sulphide ores to the oxides and not subjecting
the sulphide ores to carbon reduction directly?
i. Metal sulphides are less stable than the corresponding oxides.
ii. CO2is more volatile than CS2.
iii. Metal sulphides are thermodynamically more stable than CS2.
iv. CO2is thermodynamically more stable than CS2.

Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives
i. p-nitrophenol
ii. nitrobenzene
iii. 2,4,6-trinitrobenzene
iv. o-nitrophenol

For detailed paper here is attachment:
Attached Files
File Type: pdf IIST Chemistry Question Paper.pdf (220.6 KB, 186 views)
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