NAT II Physical Science Chemistry With Answers

NAT II Physical Science Chemistry

Sr. # Questions Answers Choice
1 Which one of the halogen acid is a liquid? HF HCl HBr Hl
2 Bromine is obtained on a commercial scale from Caliche Carnallite Common satl Cryolite
3 Dilute hydrochloric acid solution cannot be concentrated by boiling beyond 11% 33% 44% 22%
4 Which of the following halogens does not form its oxyacids? F Cl Br I
5 Which is the most volatile compound? HI HCl HBr HF
6 Sea weeds are important source of Iron Chlorine Iodine Bromine
7 When sulphur is boiled with Na2SO3solution, the compound formed is sodium sulphides Sodiums sulphates Sodium persulphate Sodium thiosulphate
8 Oleum is Castor oil Oil of vitriol Fuming of H<sub>2</sub>SO<sub>4</sub> None of them
9 The number of unpaired electrons in the p-subshell of oxygen atom 1 2 3 4
10 Ozane is not An allotrope A powerful oxidizing agent Paramegnetic a bent molecule
11 Which of the following is acidic? SO<sub>3</sub> N<sub>2</sub>O BeO HgO
12 Which of the following oxides is peroxide? Na<sub>2</sub>O<sub>2</sub> MnO<sub>2</sub> BaO SO<sub>2</sub>
13 Bond angle is minimum for H<sub>2</sub>O H<sub>2</sub>S H<sub>2</sub>Se H<sub>2</sub>Te
14 Hypo is used to photography for Developing picture Picture printed The colour of picture The fixation of picture
15 As a fixing agent in photography, sodium thisoulphate is used for Dissolving out unreacted silver bromide Converting silver halides to metallic silver Reducing solubility of AgBr Preventing overdeveloping and fogging.
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