Question 111 - There are 6 spin orbitals in p subshell in a ground state carbon atom. Only 2 electrons fill the p subshell. Number of different ways for n electrons to occupy the k spin orbitals are k! / [ (n!) (k-n)! ]. Find the number of different configurations of electrons to occupy the p subshell in a carbon atom.

1 Answers  

---

Define octane number?

0 Answers  

---

why traction voltage is 25kv

0 Answers  

---

What is a good approximation for the heat transfer coefficient of hydrocarbons inside 3/4" tubes?

0 Answers  

---

What are the different ways in which solids can be blended?

0 Answers  

---

---

what is density

2 Answers   CPCL, TII,

---

what is difference between open loop system & close loop system by overview.

1 Answers   TCL,

---

What is the working of vaccum distilation coloumn in a petroleum refinary?

4 Answers  

---

What is a "saltation velocity"?

0 Answers  

---

X is a solid having a white colour at room temperature. It has a density about 2g/cc. Although it has melting point near 325 degree Celsius, its properties start degrading above 260 degree Celsius. The coefficient of friction is very low about 0.1. It has very good dielectric properties especially at higher radio frequencies. It has a very high bulk resistivity. It is chemically inert. It is also resistant to van der Waals force. It is hydrophobic as well as lipophobic. Creep or ‘Cold Flow’ has been observed in X.

0 Answers   Ford,

---

On what basis are materials to be crushed evaluated apart from size?

0 Answers  

---

Question 52 - The half-life for first order reaction could be described in the differential equation dC / dt = -kC where k is a constant, C is concentration and t is time. (a) Find the equation of C as a function of t. (b) Find the half life for such reaction or the time required to reduce 50 % of the initial concentration, where k = 0.139 per minute. (c) When the initial concentration Co is 16 mol / cubic metre, how long does the reaction required to achieve the final concentration of 1 mol / cubic metre?

1 Answers  

---