PPSC Chemistry Part III Inorganic Chemistry Online Test With Answers

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PPSC Chemistry Part III Inorganic Chemistry Online Test

Sr. # Questions Answers Choice
1 Hydrogen gas will not redue Heated cupric oxide Headed ferric oxide Heated stannic oxide Heated aluminium oxide
2 Concentrated aqueous sodium hydroxide can separate a mixture of. Al3+ and Sn2+ Al3+ and Fe3+ Al3+ and Zn2+ Zn2+ and Pb2+
3 Amorphous boron on burning in air form B(OH)3 Only B2O3 Only BN Mixture of B2O3 and BN
4 Which of the following statements is not true for both B and Al They burn in oxygen to give oxides at high temperature Their halides are Lewis acids They combine with nitrogen to form nitrides They react with HCl to form chlroides.
5 Which of the following statements about anhydrous aluminium chloride is correct. It exist as AlCl3 molecules It is not easily hydrolysed It sublimes at 100 <sup>o</sup>C under vacuum Boron does not form B<sup>3+</sup> ions
6 AlCl3 fumes in air because of. Hydrolysis Dehydration Hydration Oxidation
7 Inert pair effect is that When an element shows incertness in chemical combination When higher oxidation state is more stable than lower oxidation state When an elecrron pair is present on the atom of an element When two s -electrons or outermost shell remain paired and do not participate in bonding.
8 Boron does not form B3+ ion because. It has small size and high ionization energy It has high electromagnetically It has high charge density None of the above
9 Alums are generally used In Dying and water proofing of fabric In arrest bleeding IN water purification All above
10 LiAIH4 is most useful reducing agent It reduce to alcohol Aldehydes Ketone Carboxylic acid Any of above
11 Reacts violently with water AlH3 AlCl3 Lia IH4 Al2Cl6
12 Al Cl3 is used in Manufacturing of petrol In borax bead test Prezervation of food All above
13 Aluminium halides is. White crystalline solid Hygroscopic Sublimes at 180<sup> o</sup>C All above
14 Sodium Tetra borate is used As alkaline buffer in dying &amp; bleaching process In manufacture of opticl glass in enameling and making glaze All above
15 The formula of borax glass is. Na2B4O7 10H2O Na2B4O7 5H2O Na B4 O7 None of above
16 Borax exist in the form Ordinary borax Octahdral borax Borax glass All above
17 Boric Acid is used In manufacture of pottery glaze In medicine as an antiseptic In tanning industry All above
18 The formula of Tetraboric acid is. H2BO3 HBO2 H2B4O7 H6B4O9
19 The formula of Borax is. Na2B4O7 6H2O Na2B4O7 8H2O Na2B4O7 10H2O Na2B4O7 12H2O
20 Dibornae is used Fro high energy fuel For welding torches as reducing agent All above
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