NAT II Physical Science Chemistry With Answers

NAT II Physical Science Chemistry

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1 Bragg's law is given by equation n<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>= 2<i></i><span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>θ</i></span>sin<span style="color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);"><i>θ</i></span> n<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>= 2 d sin<i style="text-align: center;">θ</i> 2 n<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>= d sin<i style="text-align: center;">θ</i> n<span style="font-family: &quot;Times New Roman&quot;; font-size: 24px; color: rgb(34, 34, 34); text-align: center; background-color: rgb(255, 255, 248);"><i>λ</i></span>= 1/2 d sin<i style="text-align: center;">θ</i>
2 In crystal structure of sodium chloride, the arrangement of CI-ions is Fcc Both Fcc and bcc Bcc None of these
3 Crystal can be classified in to -------------- basic crystal habits 7 3 14 3
4 Ionic solids with defects, contain Equal number of cation and anion vacancies Interstitial anions and anion vacancies Cation vacancies only Cation vacancies and interstitial cations
5 Which of the following is an example of body centred cube? Magnesium Zinc Copper Sodium
6 The pure crystalline substance on being heated gradually first forms turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears. The behaviour is a characteristic of substance forming Allotropic crystal Liquid crystals Isomeric crystals Isomorphous crystals
7 The total pressure exerted by a number of non-reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as Boyle's law Charle's law Avogadro's law Dalton's law
8 The vapour density of a gas is 11.2. The volume occupied by 11.2 g of this gas at N.T.P. is 22.4 litres 11.2 litres 1 litre 2.24 litres
9 Wt. of 112 ml of oxygen at NTP on liquification would be 0.32 g 0.64 g 0.16 g 0.96 g
10 The weight of 11.2 litres of CO2at S.T.P. would be 88 g 44 g 32 g 22 g
11 The number of atoms in 0.004 g of magnesium is close to 24 2 x 10<sup>20</sup> 10<sup>20</sup> 6.02 x 10<sup>23</sup>
12 One mole of gas refers to The number of molecules in one litre of gas The number of molecules in one gram of gas The number of molecules contained in 12 grams of <sup>12</sup>C isotope The number of molecules in 22.4 litres of a gas at S.T.P.
13 The relative rates of diffusion of a gas (molecular weight = 128) as compared to oxygen is 2 times 1/4 1/8 1/2
14 The kinetic theory of gases predicts that total kinetic energy of a gaseous assemble depends on Pressure of the gas Temperature of the gas Volume of the gas Pressure, temperature, and volume of the gas.
15 Which of the following statement is correct if the intermolecular forces in liquids A, B and C are in the order A < B < C? B evaporates more readily than A B evaporates less readily than C A and B evaporates at the same rate A evaporates more readily than C
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