Which of the following compound is weakest Lewis acid ?
(1) BF3
(2) BCl3
(3) BBr3
(4) BI3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe element among the following that does not show inert pair effect is-
1. Al
2. Sn
3. Pb
4. Thallium
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPick the correct statement :
(1) Borax is white crystalline solid containing [B4O5(OH)4]2- units
(2) Aqueous solution of borax is acidic in nature.
(3) Cobalt gives green colour in borax bead test.
(4) All are incorrect.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn amphoteric oxide among the following is-
1. CO2
2. CO
3. SnO2
4. CaO
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn B2H6
(1) there is direct boron-boron bond
(2) the structure is similar to that of C2H6
(3) the boron atoms are linked through hydrogen bridges
(4) all the atoms are in one plane
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFrom the B2H6 all the following can be prepared except:
(1) H3BO3
(2) [BH2(NH3)2]+ [BH4]-
(3) B2(CH3)6
(4) NaBH4
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following shows correct Lewis acidic strength order of trihalides of boron ?
(1) BCl3 > BBr3 > BF3 > BI3
(2) BF3 < BBr3 < BCl3 < BI3
(3) BF3 < BCl3 < BBr3 < BI3
(4) BF3 >BCl3 > BBr3 > BI3
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe correct order of ease of hydrolysis is
1. CCl4 < SiCl4 < PCl5 < AlCl3
2. AlCl3 < CCl4 < PCl5 < SiCl4
3. CCl4 < AlCl3 < PCl5 < SiCl4
4. CCl4 < AlCl3 < SiCl4 < PCl5
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIt is because inability of ns2 electrons of the valence shell to participate in bonding that
(1) Sn2+ is reducing while Pb4+ is oxidising agent
(2) Sn2+ is oxidising while Pb4+ is reducing agent
(3) Sn2+ and Pb2+ are both oxidising and reducing agent
(4) Sn4+ is reducing while Pb4+ is oxidising agent
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of carbon atoms per unit cell of diamond unit cell is:-
1. 4
2. 8
3. 6
4. 1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology