Chemistry
Test Topic TIME ; 1 Hr F.M- 90
Q:1 20g of a sample of Ba(OH) is dissolved in 50 ml of 0.1 N HCl solution . The excess of HCL was titrated with 0.1N NaOH. The volume of NaOH used was 20 cc . The percentage of Ba (OH)2 in the sample is :
(a) 128 (b) 1.28 (c) 2.28 (d) 4.08
Q:2 It takes 2.56 x 10 -3 equivalents of KOH to neutralise 0.125 g H2 XO4. The number of neutrons in X is :
(a) 16 (b) 8 (c) 7 (d) 32 Q:3 The hydrated salt Na2 SO4. n H2O , undergoes 55.9% loss in weight on heating and becomes anhydrous . The value of n will be :
(a) 5 (b) 3 (c) 7 (d) 10
Q:4 8g of sulpher is burnt to form SO2 which is oxidised by Cl2 solution . The amount of BaSO4 precipitated is :
(a) 1 mole (b) 0.5 mole (c) 0.24 mole (d) 0.25 mole
Q:5 How manymole of MnO4 ion will react with 1 mol of ferrous oxalate in acidic medium ? (a) 1/5 (b) 2/5 (c) 3/5 (d) 5/3
Q:6 10 ml of a solution of H2O2 requires 25 ml of 0.1 N KMnO4 for complete reaction . The volume strength of H2O2 is :
(a) 1.4 (b) 1.2 (c) 0.25 (d) 2.5
Q:7 Calculate the number of oxygen atoms required to combine with 7g of N2 to form N2O3 when 80% of N2 is converted into N2O3 :
(a) 2.3 x 1023 (b) 3.6 x 1023 (c) 1.8 x 1023 (d) 5.4 x 10 21
Q:8 5.6 g of a metal forms 12.7 g of metal chloride . Hence equivalent weight of metal is :
(a) 127 (b) 254 (c) 56 (d) 28
Q: 9 The density of 1 M solution of NaCl is 1.0585g/ ml. The molality of the solution is :
(a) 1.0585 (b) 1.00 (c) 0.10 (d) 0.0585
Q:10. 1 mole of Fe2S3, 2 moles of H2O and 3 moles of O2 are allowed to react according to the equation [ 2 Fe2S3 (s) + 6H2O( l ) + 3O2 (g) 4Fe(OH)3 (s) + 6 S (s) The number of moles of Fe (OH) 3 (s) that can be produced is :
(a) 1.34 (b) 2 (c) 4 (d) 3
Q:11 N2 + 3H2 2NH3 Molecular weight of NH3 and N2 are M1 and M2 , their equivalent weight are E1 and E2 . Then ( E1 - E2 ) is :
(a) 2M1 - M2 (b) ( M1 - M2 ) (c) ( 3M1 - M ) (d) ( M1 – 3M2 ) 
6Q: 12. How many grams of sodium bicarbonate are required to neutralise 10.0 ml of 0.902 M vinegar ?
(a) 8.4 g (b) 1.5g (c) 0.758g (d) 1.07 g
Q: 13 7.65 x 10 -3 moles NaNO3 require 3.06 x 10 -2 moles of a reducing agent to get reduced to NH3 . What is the n – factor of the reducing agent ?
(a) 2 (b) 3 (c) 4 (d) 5
(i) Ghooran Peer Baba Chowk Bgp - 1 (ii) M.S. College Sarai Bgp -2 ContactNo:0641-2620522,9334189884,9939070612, 9204148807 
Q:14 0.7 g of NaCO3 . cH2O were dissolved in water and the volume was made to 10 ml, 20 ml of this solution required 19.8 ml of N/10 HCl for complete neutralization . The value of x is :
(a) 7 (b) 3 (c) 2 (d) 5
Q:15 100 ml each of 0.5 N NaOH , N/5 HCl and N/10 H2SO4 are mixed together . The resulting solution will be :
(a) acidic (b) neutral (c) alkaline (d) none
Q:16 Which made of expressing concentration is independent of temperature ?
(a) Molarity (b) Molality (c) Formality (d) Normality
Q: 17 One litre of CO2 is passed over hot coke . The volume becomes 1.4 litre . The percentage composition of product is :
(a) 0.6litre CO (b) 0.8 litre CO2 (c) 0.6 litre CO2 and 0.8 litre CO (d) none Q:18. Density of water at room temperature is 1g / m1. How many molecules are there in a drop of water , if the volume is 0.05 ml .
(a) 1.67 x 1021 (b) 16.7 x 1021 (c) 1.8 x 1023 (d) 5.4 x 10 23
Q:19.5.0 molal NaOH solution has a density of 1.110 g / ml. The molarity of the solution is :
(a) 2.9732 (b) 3.05 (c) 3.64 (d) 3.0504
Q:20 The density of NH4 OH solution is 0.6 g / ml. it contains 34% by weight of NH4 OH . Calculate the normality of the solution :
(a) 5.8 N (b) 10 N (c) 0.5 N (d) 4.8 N
Q:21 How many milliliters of 0.1 M H2 SO4 must be added to 50 mL of 0.1 M NaOH to give a solution that has a concentration of 0.05 M in H2SO4 ?
(a) 400 ml (b) 50 ml (c) 200 ml (d) 100 ml
Q:22 The normality of 1% ( weight / volume H2SO4 is nearly
(a) 0.02 (b) 0.2 (c) 0.1 (d) 1
Q:23 Number of molecules of oxalic acid in 100 ml of 0.02 N oxalic acid solution are :
(a) 10 -3 x 6.023 x 1023 (b) 2 x 6.023 x 10 23 (c) 3 x 6.023 x 1023
(d) 4 x 6.023 x 1023
Q:24 Which of the following contains the same number of atoms as 6 g of magnesium ?
(a) 12g of cabon (b) 4g of oxygen gas (c) 6 g of ozone gas
(d) 27 g of aluminium.
Q.25 A gaseous mixture contains oxygen and nitrogen in the ratio of 1 : 4 by weight . Therefore , the ration of their number of molecules is :
(a) 1: 4 (b) 1: 8 (c) 7: 32 (d) 3 : 16
Q:26 How many oxygen atoms are present in 0.5 mole of sulphur dioxide ?
(a) 6.02 x 10 23 (b) 3.01 x 10 23 (c) 9.03 x 1023 (d) 12.04 x 1023
Q: 27 The number of gram molecules of oxygen in 6.02 x 1024 CO molecules is
(a) 5 gram molecules (b) gram molecules (c) 2 gram molecules
(d) 0.5 gram molecules
Q:28 When 0.1 g of hydrogen is brunt in oxygen , the number of water molecules produced is equal to :
(a) 6.02 x 10 23 (b) 3.01 x 10 23 (c) 3.01 x 1022 (d) 6.02 x 1022
Q:29 Number of atom in 558.5 g Fe ( at. wt. of Fe = 55.85g mol-1) , is
(a) twice that in 60 g carbon (b) 6.023 x 1022 (c) half that in 8 g the
(d) 558.5 x 6.023 x 1023
Q:30 Which has maximum number of atoms ?
(a) 24g C (12 ) (b) 56 g of Fe (56) 27 g of ( A1(27) (d) 108 g of Ag ( 108)
