S-Block and P-Block Elements MCQs Question and Answer in Engineering Chemistry Page-2 section-1

11.
Mg₆Si₄O₁₀(OH)₈ is commercially known as

A. asbestos

B. water-glass

C. soda-glass

D. zeolite

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12.
The Lewis acid character of BF₃, BCl₃ and BBr₃ follows the order

A. BF₃ < BBr₃ < BCl₃

B. BCl₃ < BBr₃ < BF₃

C. BF₃ < BCl₃ < BBr₃

D. BBr₃ < BCl₃ < BF₃

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13.
Which of the following is an arachno borane?

A. [B₆H₆]^2-

B. [B₅H₉]

C. [B₂H₆]

D. [B₆H₁₂]

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14.
Using chlorobenzene as solvent, the reagents needed for an efficient synthesis of borazine are

A. NH₄Cl and BCl₃

B. NH₄CI and BCl₃ and NaBH₄

C. NH₄Cl and NaBH₃

D. NH₃ and BCl₃

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15.
BH₃ $$ \cdot $$ CO is more stable than BF₃ $$ \cdot $$ CO because

A. CO is a soft base and BH₃ and BF₃ are soft and hard acids respectively

B. CO is a hard base and BH₃ and BF₃ are hard and soft acids respectively

C. CO is a soft base and BH₃ and BF₃ are hard and soft acids respectively

D. CO is a soft acid and BH₃ and BF₃ are soft and hard bases respectively

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16.
The number of 'framework electron pairs' present in the borane cluster [B₁₂H₁₂]^2- is

A. 10

B. 11

C. 12

D. 13

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17.
Triple superphosphate is made by treating phosphate rock with

A. cone. H₂SO₄

B. conc. HNO₃

C. conc. HCl

D. cone H₃PO₄

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18.
The most populated rotational state for HCl (B = 8.5 cm^-1) at 300 K is

A. 2

B. 3

C. 5

D. 7

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19.
The perxenate ion Xe$${\text{O}}_4^{4 - }$$ can be prepared by

A. direct reaction of Xe with oxygen

B. reaction of XeF₆ with oxygen

C. hydrolysis of XeF₆ in acidic medium

D. hydrolysis of XeF₆ in basic medium

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20.
BaTi[Si₃O₉] is a class of

A. orthosilicate

B. cyclic silicate

C. chain silicate

D. sheet silicate

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S-Block and P-Block Elements MCQs Question and Answer in Engineering Chemistry

11. Mg6Si4O10(OH)8 is commercially known as

Answer & Solution

12. The Lewis acid character of BF3, BCl3 and BBr3 follows the order

Answer & Solution

13. Which of the following is an arachno borane?

Answer & Solution

14. Using chlorobenzene as solvent, the reagents needed for an efficient synthesis of borazine are

Answer & Solution

15. BH3 $$ \cdot $$ CO is more stable than BF3 $$ \cdot $$ CO because

Answer & Solution

16. The number of 'framework electron pairs' present in the borane cluster [B12H12]2- is

Answer & Solution

17. Triple superphosphate is made by treating phosphate rock with

Answer & Solution

18. The most populated rotational state for HCl (B = 8.5 cm-1) at 300 K is

Answer & Solution

19. The perxenate ion Xe$${\text{O}}_4^{4 - }$$ can be prepared by

Answer & Solution

20. BaTi[Si3O9] is a class of

Answer & Solution

11.
Mg₆Si₄O₁₀(OH)₈ is commercially known as

12.
The Lewis acid character of BF₃, BCl₃ and BBr₃ follows the order

13.
Which of the following is an arachno borane?

14.
Using chlorobenzene as solvent, the reagents needed for an efficient synthesis of borazine are

15.
BH₃ $$ \cdot $$ CO is more stable than BF₃ $$ \cdot $$ CO because

16.
The number of 'framework electron pairs' present in the borane cluster [B₁₂H₁₂]^2- is

17.
Triple superphosphate is made by treating phosphate rock with

18.
The most populated rotational state for HCl (B = 8.5 cm^-1) at 300 K is

19.
The perxenate ion Xe$${\text{O}}_4^{4 - }$$ can be prepared by

20.
BaTi[Si₃O₉] is a class of