Which of the following gases when passed through warm dilute solution of H2SO4 in presence of HgSO4 gives acetaldehyde

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1. Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?

   A. Nylon 66 B. urotropine C. Aniline formaldehyde plastic D. Bakelite...

2. The reaction of carboxylic acids with alcohols in presence of cone. H2SO4 is called _________________?

   A. esterification B. neutralization C. hydrolysis D. saponification...

3. The pH of 10-3 mol dm-3 of an aqueous solution of H2SO4 is_________________?

   A. 3 B. 2.7 C. 2 D. 1.5...

4. Treating phenol with formaldehyde in the presence of dilute base forms Bakelite. The process involved is_________________?

   A. oxidation B. elimination C. condensation polymerization D. additional polymertization...

5. Electrolysis of dilute solution of NaCl results at the anode_______________?

   A. sodium B. hydrogen C. chlorine D. oxygen...

6. Which of the following is not a use of acetaldehyde ?

   A. formation of phenolic resins B. formation of mirror C. antiseptic inhalant D. formation of throat lozenges...

7. Acetaldehyde cannot show

   A. Iodoform test B. Lucas test C. Benedict’s test D. Tollen’s test Submitted by: Aamir khan Hullio...

8. Which one of the following gives white precipitate with aqueous solution of BaCl2?

   A. NaHCO3 B. NaNO3 C. Na2CO3 D. Na2CrO4...

9. Aqueous solution of borax above 62°C gives crystals of________________?

   A. Na2B4O7.4H2O B. Na2B4O7.5H2O C. Na2B4O7.2H2O D. Na2B4O7.10H2O...

10. When SO2 solution is passed over which of the following it turns green?

    A. K2Cr2O7 B. H2SO4 C. SO3 D. P2O5 Submitted by: Muhammad Ali Kunbhar...