Chemistry Fsc Part 1 Online Test With Answers

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Chemistry Fsc Part 1 Online Test

Sr. # Questions Answers Choice
1 A solution of glucose is 10% The volume in which 1 g mole of it dissolved will be. 1 dm3 1.8 dm3 900 cm3 200 cm3
2 18 g glucose is dissolved in 90 g o water, The relative lowering of vapour pressure is equal to. 1/5 5.1 1/51 6
3 Which statement is correct about solubility product constant. It is applicable at highly soluble substances. Value of Kap is independent of temperature It is used for homogeneous aquarium system It can be used to predict that precipitation will take place or not by combining two ions
4 A solution will be unsaturated if Ionic product = Kap Ionic product < Ksp Ionic Product > Ksp both 'a' and 'b' are correct
5 Some impurities of MgCl2 are present in NaCl which separation technique can be used to separate the impurities. Filtration Crystallization Common ion effect Chromatography
6 When HCl is added to H2S aqueous solution, Its ionization Decrease Increase Remains constant First increases than decreases
7 When small amount of acid or base is added to buffer, its pH. Remain same Always increases Always decreases slightly increases or decreases
8 pKa of CH3COOH is 4.74. The pKb value of CH3COO- ions will be 7 14 9.26 zero
9 pH of buffer is calculated by. Sorenson equation Mosley equation Henderson equation De broglie equation
10 One dm3 of a buffer solution containing 0.01 M NH4Cl and 0.1 M NH4OH having pKa of 3 has pH. 4 6 9 10
11 Buffer action can be explained by Common ion effect Law of mass action Le Chateller's principle All above
12 Sum of pKa and pKb is equal to. 1 7 0 14
13 Which acid has less value of pKa. CH3COOH H2S H2CO3 HCl
14 pH of rain water. 7 Slightly basic slightly acidic Highly basic
15 A solution has pH zero. Its H+ ions concertation will zero More than unity Less than unity Unity only
16 Kw for water at 0 oc is 0.1 x 10-34 and at 100 oC 7.5 x 10-14, How many times dissociation of water increase from 0 oCto 100 oC 7.5 times 50 times 75 times 100 times
17 A solution have H+ ions concentration 1 x 10-7 , its pH will Acidic Basic Neutral Zero
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