Year :
1991
Title :
Chemistry
Exam :
JAMB Exam
Paper 1 | Objectives
31 - 40 of 49 Questions
| # | Question | Ans |
|---|---|---|
| 31. |
Which of the following salts can be melted without decomposition? A. Na2CO3 B. CaCO3 C. MgCO3 D. ZnCO3 |
A |
| 32. |
Oxygen gas can be prepared by heating? A. ammonium trioxonitrate (V) B. ammonium trioxonitrate (III) C. ppotassium trioxonitrate (V) D. mamgamese (IV) oxide |
C |
| 33. |
Addition of aqueous ammonia to a solution of Zn++ gives a white precipitate which dissolves in an excess of ammonia because? A. zinc is amphoteric B. zinc hydroxide is readily soluble C. zinc forms a complex which is readily soluble in excess ammonia D. ammonia solution is a strong base |
C |
| 34. |
Which of the following, in clear solution, forms a white precipitate when carbon (IV) oxide is bubbled into it for a short time? A. KOH B. NaOH C. Ca(OH)2 D. AI(OH)3 |
C |
| 35. |
Which of the following metals can be prepared in samples by the thermal decomposition of their trioxonitrate (V) salts? A. Copper and mercury B. Silver and copper C. Mercury and silver D. Magnesium and mercury |
C |
| 36. |
Copper (II) tetraoxosulphate (IV) is widely used as a? A. fertilizer B. fungicide C. disinfectant D. purifier |
B |
| 37. |
Which of the following compounds can exist as geometric isomers? A. 2-methylbut-2ene B. But-2-ene C. But-1-ene D. CI-C-Br |
B |
| 38. |
How many grams of bromine will be required to completely react with 10 g of propyne? A. 20 g B. 40 g C. 60 g D. 80 g Detailed SolutionC3H4 + 2Br2 - C3Br4 + 2H2(36 + 4) (4 X 80) 40 g of C3H4 reacts with 320 g of Br 10 " " will react with (10)/(40) x (320) /(1) = 80g |
|
| 39. |
Ethene when passed into concentrated H2SO4 is rapidly absorbed. The product is diluted with water and then warmed to produce? A. ethanol B. diethyl ether C. ethanal D. diethyl sulphate |
A |
| 40. |
One advantages of detergents over soap is that detergents? A. are easier to maufacture B. foam more than soap C. form soluble salts with hard water D. are able to deter germs more than soap |
C |
| 31. |
Which of the following salts can be melted without decomposition? A. Na2CO3 B. CaCO3 C. MgCO3 D. ZnCO3 |
A |
| 32. |
Oxygen gas can be prepared by heating? A. ammonium trioxonitrate (V) B. ammonium trioxonitrate (III) C. ppotassium trioxonitrate (V) D. mamgamese (IV) oxide |
C |
| 33. |
Addition of aqueous ammonia to a solution of Zn++ gives a white precipitate which dissolves in an excess of ammonia because? A. zinc is amphoteric B. zinc hydroxide is readily soluble C. zinc forms a complex which is readily soluble in excess ammonia D. ammonia solution is a strong base |
C |
| 34. |
Which of the following, in clear solution, forms a white precipitate when carbon (IV) oxide is bubbled into it for a short time? A. KOH B. NaOH C. Ca(OH)2 D. AI(OH)3 |
C |
| 35. |
Which of the following metals can be prepared in samples by the thermal decomposition of their trioxonitrate (V) salts? A. Copper and mercury B. Silver and copper C. Mercury and silver D. Magnesium and mercury |
C |
| 36. |
Copper (II) tetraoxosulphate (IV) is widely used as a? A. fertilizer B. fungicide C. disinfectant D. purifier |
B |
| 37. |
Which of the following compounds can exist as geometric isomers? A. 2-methylbut-2ene B. But-2-ene C. But-1-ene D. CI-C-Br |
B |
| 38. |
How many grams of bromine will be required to completely react with 10 g of propyne? A. 20 g B. 40 g C. 60 g D. 80 g Detailed SolutionC3H4 + 2Br2 - C3Br4 + 2H2(36 + 4) (4 X 80) 40 g of C3H4 reacts with 320 g of Br 10 " " will react with (10)/(40) x (320) /(1) = 80g |
|
| 39. |
Ethene when passed into concentrated H2SO4 is rapidly absorbed. The product is diluted with water and then warmed to produce? A. ethanol B. diethyl ether C. ethanal D. diethyl sulphate |
A |
| 40. |
One advantages of detergents over soap is that detergents? A. are easier to maufacture B. foam more than soap C. form soluble salts with hard water D. are able to deter germs more than soap |
C |