NAT II Physical Science Chemistry With Answers

NAT II Physical Science Chemistry

Sr. # Questions Answers Choice
1 Formic acid is obtained when Calcium acetate is heated with conc. H<sub>2</sub>SO<sub>4</sub> Calcium formate is heated with calcium acetate Glycerol is heated with oxalic acid Acetaldehyde is oxidized with K2Cr<sub>2</sub>O<sub>7</sub> and H<sub>2</sub>SO<sub>4</sub>
2 Sulphonation of benzoic acid produces mainly o-Sulphobenzoic acid m-Sulphobenzoic acid p-Sulphobenzoic acid o- and p-Sulphobenzoic acid
3 Heating a mixture of sodium benzoate and soda lime gives Methane Benzene Sodium benzoate Calcium benzoate
4 Toluene can be oxidized to benzoic acid by KMnO<sub>4</sub>(alk) K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub>(acidic) Both None
5 Reaction of acids with alcohols is also known as Esterification Saponification Alkalization None
6 Acetic anhydride is obtained from acetyl chloride by the reaction of P<sub>2</sub>O<sub>5</sub> H<sub>2</sub>SO<sub>4</sub> CH<sub>3</sub>COONa CH<sub>3</sub>COCH<sub>3</sub>
7 In public urinals, we observe some nascent smell. This smell is due to Hydrolysis of urea of urine by urease of atmosphere into NH<sub>3 </sub>and CO<sub>2</sub> Formation of sulphonic acid by urea of urine Reaction of CO<sub>2</sub>of atmosphere with urea mononitrate in urine Hydregen present in air reacts with nitrogen forming NH<sub>3</sub>
8 Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBh4or LiAH4? 1-Propanol 2-Propanol 2-Methyl2-Proponal Ethanol.
9 Calcium acetate when dry distilled gives Formaldehyde Acetaldehyde Acetone Acetic anhydride
10 At room temperature formaldehyde is Gas Liquid Solid None of the above
11 Cannizzaro reaction is not given by Trimethyl acetaldehyde Acetaldehyde Benzaldehyde Formaldehyde.
12 On heating acetaldehyde with ammonical silver nitrate solution, we get CH<sub>3</sub>OH Silver acetate HCHO Silver mirror
13 Aldehydes are produce in atmosphere by Oxidation of secondary alcohols Reduction of alkenes Reaction of oxygen atoms with hydrocarbons Reaction of oxygen atoms with ozone.
14 Propyne on hydrolysis is presence of H2SO4and HgSO4 gives Acetaldehyde Acetone Formaldehyde None
15 Tollen's reagent is Ammonical cuprous chloride Ammonical cuprous oxide Ammonical silver bromide Ammonical silver nitrate
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