Chemistry Answers

Rank the following in order of increasing surface tension at a given temperature, and explain your ranking:

A.) CH3OH

B.) CH3 CH3

C.) H2C=0

What is the pH solution containing 0.30 M HCOOH and 0.52 M HCOOK?Compare your result with the pH of a 0.30 M HCOOH solution

Write the IUPAC names of the products obtained by the ozonolysis of Hex-2-ene.

To make a solution, 38.7 g of a nonelectrolyte is dissolved into 218 g of water. The freezing point of the solution is measured to be -5.53°C. Calculate the molar mass of the solute.

1.Write the Molecular Formula of 2-methyl-1-butene.

2. Write the equation if the compound in number 1 will be subjected to hydrobromination.

3. The product in number 2 is treated with Grignard Reagent. Write the two steps chemical reactions.

4. Write the molecular formula of the major product in number 3

5. The answer in number 4 is exposed to combustion. Write and balance the chemical reaction.  

A water sample was reported to contain 250 ppm CaCO3. How many grams of CaCO3 is present in 4 liters of water.

Give mechanism of the following:

(i) Hydrohalogenation of an alkyne

(ii) Ozonolysis of an alkyne

Write the possible conformation of butane. Arrange these conformations in the increasing order of their stability giving reasons.

100 mL of a water sample consumed 10 mL of N/50 H

2

SO

4

during titration using

phenolphthalein as

an

indicator. Few drops of methyl orange were added to the same

solution and titration was continued. The yellow colour of the solution just turned orange

after addition of another 21 mL of the same acid solution. Ca

lculate the type and extent

of alkalinity present in the water sample.

What could be the disadvantages of using this

water sample source in boiler?

100 mL of a water sample consumed 10 mL of N/50 H

2

SO

4

during titration using

phenolphthalein as

an

indicator. Few drops of methyl orange were added to the same

solution and titration was continued. The yellow colour of the solution just turned orange

after addition of another 21 mL of the same acid solution. Ca

lculate the type and extent

of alkalinity present in the water sample.

What could be the disadvantages of using this

water sample source in boiler?