NAT II Physical Science Chemistry With Answers

NAT II Physical Science Chemistry

Sr. # Questions Answers Choice
1 The acid used in lead storage cells is Phosphoric acid Nitric acid Sulphuric acid Hydrochloric acid
2 Which of the following fluorides does not exist? NF<sub>5</sub> PF<sub>5</sub> AsF<sub>5</sub> SbF<sub>5</sub>
3 Phosphorus pentoxide finds use as An oxidizing agent A reducing agent a bleaching agent A dehydration agent.
4 Red P can be obtained from white P by Heating it with a catalyst in an inert atmosphere Distilling it in an inert atmosphere Dissolving it in CS<sub>2</sub>and crystallzing Melting it and pouring the liquid into water
5 White P when boiled with strong solution of caustic soda produces Phosphine Posh acid Phosphorous acid None
6 Each of following is true of white and red phosphours except that they Are both soluble in CS<sub>2</sub> Can be oxidized by heating in air Consist of the same kind of atoms Can be converted into one another
7 Which one of the following compounds does not exist? NCl<sub>5</sub> AsF<sub>5</sub> SbCl<sub>5</sub> PF<sub>5</sub>
8 BiCl3on hydrolysis forms a white precipitate of Bismuthio acid Bismuth oxychloride Bismuth pentachloride Bismuth hydroxide.
9 Phosphide ion has the electronic structure similar to that of Nitride ion Fluoride ion Sodium ion Chloride ion
10 Which one of the following elements occurs free in nature? N P As Sb
11 Red lead is PbO Pb<sub>3</sub>O<sub>4</sub> PbO<sub>2</sub> Pb<sub>4</sub>O<sub>3</sub>
12 Which of the following statements is correct with respect to the property of elements with increase in atomic number in the carbon family (group 14)? Their metallic character decreases The stability of +2 oxidation state increases Their ionization energy increases Their atomic size decreases
13 White lead is Basic lead acetate Acidic lead carbonate Basic lead carbonate Basic lead hydroxide
14 Which of the following has no tin in its composition? Solder Bronze Brass Tin stone
15 The chemical composition of white lead is Na<sub>2</sub>CO<sub>3</sub> Pb<sub>3</sub>O<sub>4</sub> Pb(OH)<sub>2</sub>.2PbCO<sub>3</sub> PbO
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