The Valence Bond Theory does not explain the paramagnetic nature of oxygen molecule.

Which of the following statements are true about Oxygen and Carbon molecules? Statement 1: Oxygen molecule (O2) is diamagnetic in nature. Statement 2: Carbon molecule (C2) is diamagnetic in nature.

A

Statement 1 is true but statement 2 is false

B

Statement 1 is false but statement 2 is true

C

Statement 1 and statement 2, both are true

D

Statement 1 and statement 2, both are false

In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The K_La for such a system will be (K_La = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)

A

$$\frac{{\left( {rX} \right)}}{{\left( {C* - C} \right)}}$$

B

$$\frac{{\left( r \right)}}{{X\left( {C* - C} \right)}}$$

C

$$\frac{{\left( {C* - C} \right)}}{{\left( {rX} \right)}}$$

D

$$\frac{{\left( X \right)}}{{r\left( {C* - C} \right)}}$$

The conceptual framework of labour welfare is contained in various theories of labour welfare. In the names of the theories given below, pick the wrong ones
1. The Trusteeship Theory
2. The Placating Theory
3. The Need Theory
4. The Friendship Theory
5. The Public Relations Theory
6. The Functional Theory

A

1 and 2

B

3 and 4

C

5 and 6

D

2 and 5

Which of the following statements are true/false?
1. Trusteeship theory is also known as paternalistic theory.
2. The Philanthropic theory is based on the fact that man is a religious being.
3. The Functional theory is also known as efficiency theory.
4. Efficiency theory assumes that big business houses have the social responsibility and moral obligations of providing good working conditions.

A

1, 4 are true and 2, 3 are false

B

1, 3 are true and 2, 4 are false

C

2, 4 are true and 1, 3 are false

D

3, 4 are true and 2, 1 are false

The theories that explain the formation of 'Informal Groups' are to include which of the following?
1. Propinquity Theory
2. Similarity or Balance Theory
3. Displacement Theory
4. Need for achievement Theory
Choose the correct option from those given below:

A

1 and 4 only

B

1 and 2 only

C

1, 2 and 3 only

D

1, 2, 3 and 4 only

A bond gets matured in 10 years . invested TK. 42,000 in this bond and received Tk. 105000 once the bond matured . If the bond was under simple interest . then what was the rate of interest per annum?

A

10%

B

12.5%

C

15%

D

7.5%

If the bond length of C-Cl bond in chloromethane is 178pm, what will be the probable bond length of C-Br bond in bromomethane?

A

139pm

B

156pm

C

178pm

D

193pm

Study the following statements.
1. A bond formed by the transfer of electrons between atoms of the element is called ionic bond.
2. A bond formed by sharing of electrons between atoms of the elements is called covalent bond.
Which of the statements given above is/are correct?

A

Only 1

B

Only 2

C

1 and 2

D

None of the above

Propositions as regards the liability of the surety under the surety bond are:
1. The liability of the surety is mutually exclusive of the liability of the accused under his personal bond.
2. The liability of the surety is contingent on the liability of the accused under his personal bond the liability of the surety.
3. is limited to the amount of the surety bond.
Now which of the following is correct

A

1 and 3 are correct

B

1 and 2 are correct

C

2 and 3 are correct

D

1, 2 and 3 all are correct

Intermolecular distance of bond in secondary valence bond is ____________

A

1-2

B

2-3

C

0.5-5

D

>5

The Valence Bond Theory does not explain the paramagnetic nature of oxygen molecule.

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