Answer Posted / al jaber

In any chemical reaction to collect gas using water in beakers and testtubes.The gas from the reaction travels along the delivery tube the gas bubbles through the water and will rise into the water the gas then pushes the water until the test tube is full of gas this pushing of water called downward displacement of water

Sr-90, a radioactive isotope, is a major product of an atomic bomb explosion. It has a half life of 28.1 year. Calculate the first order rate constant for this nuclear decay and the fraction of 90Sr that remains after 10 half lives?

6176

---

what is induction on electrical insulators

2270

---

why athanol-water mixtuere have maximum viscocity in wt% 40?

1680

---

Normally entropy is expressed as q/T. But, work and heat have same unit. Why can't it be replaced by work?

2209

---

what kind of question can be asked in interview for polarimeter related ?

5141

---

4 Identify the substance oxidized, reduced, oxidizing agent and reducing agent for the following reactions

2433

---

Why does the experimental lattice enthalpy of NaI differ greatly from the theoretical lattice enthalpy?

3355

---

Write the each half cell reaction and also net cell reaction for a cell

2864

---

what is the difference between elctrefining and electrolysis?

2184

---

What is the brigg's raucher reaction?

2289

---

How to accelerate electron capture decay?

2309

---

. Given that 2Hg2+ (aq) + 2 e- Hg22+(aq) E0 =0.92V Hg22+ (aq) + 2 e- 2Hg(l) E0 =0.85V Calculate standard free energy change and K for the following process at 25oC Hg22+(aq) Hg2+ (aq) + Hg(l)

6583

---

WHAT IS THE SYLLABUS OO GROUP -I?

2240

---

In testing of Cement the formula for water requirement for setting time is as below- Water required for setting time = NC x 0.85 The question is that what is the logic of 0.85 in this formula??

2378

---

what is allowable limit Of stray light for a spectrophotometer laboratory instruments ?

1456

---