There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void.

A

Equal to

B

Greater than

C

Less than

D

Either A, B or C; depends on the size of atom

Which function is not called in the following C program?

#include void first(){ printf("first");}void second(){ first();}void third(){ second();}void main(){ void (*ptr)(); ptr = third; ptr();}

A

Function first

B

Function second

C

Function third

D

None of the mentioned

Identify the correct relation between Δo and Δt, where Δo denotes crystal field splitting in octahedral complexes and Δt denotes crystal field splitting in tetrahedral complexes.

A

Δo < Δt

B

Δo > Δt

C

Δo = Δt

D

Δo ≥ Δt

What is the surface area of the plastic random packing conventional packing material used in trickling filters as the packing medium?

A

60 m2/m3

B

90 m2/m3

C

98 m2/m3

D

150 m2/m3

What is the surface area of the plastic random packing high specific surface area packing material used in trickling filters as the packing medium?

A

60 m2/m3

B

90 m2/m3

C

98 m2/m3

D

150 m2/m3

Werner postulated that octahedral, tetrahedral and square planar geometrical shapes are more common in coordination compounds of ________

A

alkali metals

B

lanthanides

C

actinides

D

transition metals

The number of manganese ions in tetrahedral and octahedral sites, respectively in Mn₃O₄ are

A

one Mn²⁺ and two Mn³⁺

B

one Mn³⁺ and two Mn²⁺

C

two Mn³⁺ and one Mn²⁺

D

two Mn²⁺ and one Mn³⁺

If N is the number of tetrahedral voids in a close-packed structure, then the number of octahedral voids is:

A

N/4

B

4N

C

2N

Ratio of tetrahedral to octahedral voids in FCC

A

3

B

2

C

12

D

4

Which of the following do not show geometrical isomerism? (Assume all ligands are unidentate) b) Square planar c) Octahedral d) Octahedral

A

Square planar

B

MXL3

C

MXL3

D

MXL3

There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

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