Chemistry Test ...

For the indicator HIn the ratio \(\frac{[\mathrm{In}]}{[\mathrm{HIn}]}\)is 7.0 at pH of 4.3. K_eq for the indicator is :

[Given log 7 = 0.845 and Antilogo(0.545)=3.5

Glyptal is classified as a :

Place the following alcohols in decreasing order of rate of dehydration with concentrated H₂SO₄ :

1. CH₃CH₂CH(OH)CH₂CH₂CH₃

2. (CH₃)₂C(OH)CH₂CH₂CH₃

3. (CH₃)₂C(OH)CH(CH₃)₂

4. CH₃CH₂CH(OH)CH(CH₃)₂

​5. CH₃CH₂CH₂CH₂CH₂CH₂OH

In the synthesis of glycerol from propene, the steps involved are :

Among the following pair of oxides, which pair cannot be reduced by carbon to give the respective metals ?

The half-life of a radioactive isotope is three hours. If the initial mass of the isotope were 256 g, the mass of it remaining undecayed after 18 hours would be :

1.2 g of a salt with its empirical formula K_xH_y(C₂O₄)_z was dissolved in 50 mL of water and its 10 mL portion required 11 mL of a 0.1 M HCl solution to reach the equivalence point. In a separate titration, 15 mL of the stock solution required 20 mL 0.2475 M KOH to reach the equivalence point. Identify the correct option.

Which of the following will react with water and forms stable hydrate?