You can check NDA Chemistry Past questions 1 – 20 here
21. How many grams of Ca(OH)2 are in 1500cm3 of 0.0250M Ca(OH)2
A. 3.17 g
B. 2.78 g
C. 1.85 g
D. 2.34 g
22. What volume of 0.50M KOH would be required to neutralize completely 500cm3of 0.25M HCl solution?
A. 2.5 x 102 cm3
B. 1.4 x 103 cm3
C. 83 cm3
D. 7.5 x 102 cm3
23. What colour change is observed when ethane is passed into an acidified K2Cr2O7 solution?
A. The solution changes from orange to green
B. The solution changes from brown to orange
C. The solution changes from brown to green
D. The solution changes from yellow to orange
24. What element characterizes amino acids?
A. Hydrogen
B. Oxygen
C. Nitrogen
D. Carbon
25. Which of the following reagent cannot be used to test for the presence of primary alkanol?
A. Conc. H2SO4 and KMnO4
B. Conc. H2SO4 and Ethanoic acid
C. Conc. H2SO4 and K2Cr2O7
D. Conc. H2SO4 and Ethanol
26. Which is a saturated hydrocarbon?
A. C3H8
B. C6H6
C. C2H5OH
D. C2H4O2.
27. When sucrose solution is warmed with dilute hydrochloric acid, the resulting solution will:
A. decolourize Bromine water
B. give a brick-red precipitate with Fehling’s solution
C. give a white precipitate with BaCl2
D. turn starch iodide paper black
28. Using the IUPAC system of naming the compound below is known as
A. 1,3-pentamethylpropane
B. 1,1,3,3-tetramethylbutane
C. 2,2,4-trimethylpentane
D. 2,4,4-trimethylpentane
29. Which of the following organic chlorides will not give a Friedel-Craft alkylation product when heated with benzene and AlCl3
A. (CH3)3CCl
B. CH2=CHCH2Cl
C. CH3CH2Cl
D. CH2=CHCl
30 What is the total number of sigma bonds in the following compound?
CH3 — CH − C = CH — C − CH2
A. 8
B. 10
C. 12
D. 14
31. Pi-bond in the following compound can be found between
H — C1 = C2H2 — C3H — NH2
A. C2 and C3
B. C1 and C2
C. C1 and C3
D. C3 and N
32. Which of the following is an important reactive electrophile in aromatic ring nitration?
A. NO2(+)
B. NO(+)
C. N2(+)
D. N2O(+)
33. The separation of petroleum fractions depends on the differences in their
A. Molar masses
B. Melting point
C. Boiling points
D. Solubilities
34. What is the IUPAC name for the following compound?
A. Dimethylcyclohexane
B. cis-1,3-dimethylcyclohexane
C. 1,3-dimethylcyclohexane
D. trans-1,3-dimethylcyclohexane
35. What is the name of the following compound?
A. 3-methylhexane
B. 2-propyl- 1 -butane
C. 2-ethyl- 1 -pentene
D. 4-ethyl-4-pentene
36. The electronic configuration of Mg2+ is
A. 1S22S22P6
B. 1S22S22P63S2
C. 1S22S22P63S1
D. 1S22S22P4
37. How many moles of KBrO3 are required to prepare 0.0700 moles of Br2according to the reaction below
KBrO3 + 5KBr + 6HNO3 ⟶ 6KNO3 + 3Br2 +3H2O
A. 0.210
B. 0.0704
C. 0.220
D. 0.0233
38. The formula weight of the compound, CaSO4 is:
A. 394.4g
B. 140.0g
C. 136.0g
D. 466.8g
39. How many moles of alanine, C3H7NO2, are there in 159g of alanine?
A. 1.42 x 104
B. 1.78
C. 0.992
D. 0.560
40 Which of the following does not have a noble gas electron configuration?
A. S2-
B. Ba+
C. Na+
D. O3-
