At a given temperature, K₁, K₂ and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively. CH₄(g) + H₂O(g) ⇋ CO(g) + 3H₂(g), CO(g) + H₂O(g) ⇋ CO₂(g) + H₂(g) CH₄(g) + 2H₂O(g) ⇋ CO₂(g) + 4H₂(g) Then K₁, K₂ and K3 are related as:

E0Ag/Ag+=+1.32V, E0H/H+=0Vতড়িৎদ্বার দুটি দ্বারা গঠিত কোষের সংকেত কোনটি ?i. Ags/Ag+aq∥H+1M/H2g; 1 atm. Ptii. Ags/Ag+aq∥H+aq/H2g; 1 atm. Ptiii. Ags/Ag+aq∥H+/H2g; Ptনিচের কোনটি সঠিক ?

A

i ও ii

B

ii ও iii

C

i ও iii

D

i, ii ও iii

নিম্নলিখিত বিক্রিয়াটির প্রধান উৎপাদ এর নাম লিখ :COg+H2g+H2g→ZnO, Cr2O3300∘C, 200 atm

A

CH4

B

CH3OH

C

C2H5OH

D

H2O

For the pair of reactions given below,
(i) N₂(g) + 3H₂(g) $$ \rightleftharpoons $$ 2NH₃(g)
(ii) $$\frac{1}{2}$$N₂(g) + $$\frac{3}{2}$$H₂(g) $$ \rightleftharpoons $$ NH₃(g)
If at a particular temperature, K_p1 and K_p2 are the equilibrium constants for reactions (i) and (ii) respectively then

A

Kp1 = 2Kp2

B

Kp1 = $${\text{K}}_{{\text{p2}}}^2$$

C

2Kp1 = Kp2

D

$${\text{K}}_{{\text{p1}}}^2$$ = Kp2

The equilibrium constant of a reaction is 20 units and the equilibrium constant of other reaction is 30 units when both the reactions are added up together then the equilibrium constant of the resultant reaction is given by _____________

A

20 units

B

600 units

C

50 units

D

10 units

Marginal cost is equal to marginal revenue, average cost is equal to average revenue, average revenue is equal to marginal revenue and average cost is equal to marginal cost. This is the condition of
1. long period equilibrium for a firm under monopoly
2. short period equilibrium for a firm under oligopoly
3. long period equilibrium
4. long period equilibrium for a firm under perfect competitions
Select the correct answer

A

Both 1 and 4

B

Both 3 and 4

C

Both 3 and 1

D

Only 1

The marginal cost is equal is to marginal revenue, the average cost is equal to average revenue, average revenue is equal to marginal revenue, and the average cost is equal to marginal cost. This is the condition of
1. Long-period equilibrium for a firm under monopoly.
2. Short-period equilibrium for a firm under oligopoly.
3. Long-period equilibrium
4. Long-period equilibrium for a firm under perfect competition.

A

1 and 4

B

3 and 4

C

1 and 3

D

Only 1

A particular price level, there are no forces tending to move it either up or down, it means
1. the firm is in equilibrium.
2. the price is in equilibrium.
3. the equilibrium price of the firm.
4. the equilibrium price and quantity of a firm.
Select the correct answer

A

Both 1 and 4

B

1, 2 and 4

C

Both 1 and 3

D

Only 4

Zinc oxide is reduced at a constant temperature in a closed reactor using ZnO(s) and C(s) as the only starting materials. The following reactions are assumed to be at thermodynamic equilibrium:
ZnO(s) + C(s) = Zn(g) + CO(g)
2CO(g) = CO₂(g) + C(s)
Assume ideal gas behaviour. Based on mole balance, the relationship applicable to the system at equilibrium is

A

Pzn = Pco + 2Pco2

B

Pzn = 2pco + Pco2

C

Pzn = pco + Pco2

D

Pzn = 0.5 Pco + 2Pco2

Which of the following statements is true for the center of gravity (cog) and the center of pressure (cop) location along the axis of a fuel powered aircraft?

A

cog and cop both changes

B

cog remains fixed but cop changes

C

cog and cop both remain fixed

D

cog changes but cop remains fixed

Which of the following statements about COG is incorrect regarding its features?

A

Currently, there are 4,873 clusters in the COG databases derived from unicellular organisms

B

It is constructed by comparing protein sequences encoded in forty-three completely sequenced genomes, which are mainly from prokaryotes, representing thirty major phylogenetic lineages

C

The interface for sequence searching in the COG database is the COGnitor program, which is based on gapped BLAST

D

It is a protein family database based on structural classification