Chemistry Answers

30 cm³ of 0.1 M Al (NO₃)₃ SOLUTION IS RECTED WITH 100cm³ of 0.15M of NaOH solution. Which reactant is in excess, and by now much ?

• A. NaOH solution by 70 cm³
• B. NaOH solution, by 60 cm³
• C. NaOH solution by 40 cm³
• D. Al(NO₃)₃ solution by 20 cm³
• E. Al(NO₃)₃ solution by 10 cm³

You have two test tubes T1 and T2 . T1 contains 2.0 mL of 0.1 N CuCl2 solution and T2 contains 2.0 mL of 0.1 N NiCl2 solution. You add dil. HCl in both the test tubes till the solutions turns acidic. Then you pass H2S gas in both the test tubes. In which of the two test tubes precipitation will occur readily? What is the principle behind the formation of precipitate?

iron reacts with sulfuric dilute acid. given the same mass of iron, which form of iron will react the fastest when acid is added and which will react slower ?

iron wool

iron filings

iron nails

a block of iron

. The red spectral line of lithium occurs at 671nm.calculate the energy of one photon.

Find the weight of H, stored in 100-cm' cylindrical tank at 100 °C and 100 atm (10, 132.5 KPa) using (a) Ideal gas equation (b) van der Waals equation if a = 0.244 atm-L²/mole and b = 0.0266 L/mole. (Note: Use the method of successive approximation to solve for the mass of H₂)

C4H8 has four isomers. A, B & Cgets reduced by KMnO4; D does not get reduced by

KMnO4. A forms an optically inactive mixture of two optically active forms in equal

amounts with acidified KMnO4 while B forms optically inactive meso form with

acidified KMnO4. Identify A, B, C & D. (Draw the structures of A, B, C & D with proper

explanation).

 240 dm³ of air at s.t.p is compressed to 17 atmospheres in a compression tube. Determine the volume in dm³ occupied in the tube.

The vehicle that was transporting the dynamite sticks in Part A has been struck by another vehicle. A small fire appears to be spreading from a tire on a vehicle at the scene of the accident. Identify the explosive material that could be involved, and describe the chemical interaction that could be occurring as a result of the collision between the two vehicles. What immediate action should the EHS and FS responders take to protect human health and the environment?

Can a solution be saturated but dilute? If yes give example?

Give 2 examples of a process in which the Entropy of the system decreases but the entropy of the Universe increases.