In Which Ion May Form A Scummy Precipitate With Ordinary Gas
1. When glucose, C6H12O6, is completely oxidized with excess oxygen, what are the products?
A. H2O2 and CO2
B. H2O and CO2
C. H202 and CO
D. H2O and CO
2. Which ion may form a scummy precipitate with ordinary soap? (soap has a negative charge)
A. HCO3-
B. CO32-
C. Na+
D. Ca2+
3. An element forms a basic oxide with the formula XO and a hydride with the formula XH2. The hydride reacts with water to give hydrogen gas. The element X could be?
A. K
B. Ca
C. N
D. O
4. Which metal reacts with concentrated NaOH to produce hydrogen gas?
A. Al
B. Cu
C. Fe
D. MG
5. In which pair does the named element have the same oxidation number?
A. Sulfur in H2S2O7 and H2SO4
B. Mercury in Hg2+ and Hg22+
C. Oxygen in Na2O2 and H2O
D. Cobalt in Co(NH3)62+ and Co(NO3)2 …show more content…
Metallic zinc is the reducing agent
B. Metallic zinc is reduced
C. Copper ion is oxidized
D. Sulfate ion in the reducing agent
10. In which set are the substances arranged in order of decreasing solubility in water?
A. Al(OH)2 > Mg(OH)2 > NaOH
B. BaSO4 > CaSO4 > MgSO4
C. CaCO3 > NaHCO3 >Na2CO3
D. AgCl > AgBr > AgI
11. What Volume of 10M HCl solution is required to prepare exactly 500 mL of a 0.60M HCl solution?
A. 10mL
B. 14mL
C. 30mL
D. 40mL
12. What is the molarity of a solution made by dissolving 9.56g of sodium acetate(82.03g/mol) in water and diluting to 650mL?
A. 0.179M
B. 1.206M
C. 1.7X10-3M
D. 12.06M
13. A teaching assistant wants to prepare 500ml of 0.10M NaCl solution. Which procedure does she follow?
A. Add 1.46g of NaCl to 500mL of water.
B. Add 2.92g of NaCl to 500ml of water.
C. Dissolve 1.46 g of NaCl in 100mL of water and dilute to 500mL
D. Dissolve 2.92 g of NaCl in 100mL of water and dilute to 500mL
14. A hydrocarbon with the general formula CXHy was burned in air, yielding 0.18g of water and 0.44 g of carbon dioxide. What is the formula?
A. C2H2
B. C2H4
C. C2H6
D. C6H6
15. How many mols of iron react with 1.7mols of oxygen gas to form iron(III) oxide?
A. 2.33mol
B. 1.75mol
C. 1.31mol
D.
A. H2O2 and CO2
B. H2O and CO2
C. H202 and CO
D. H2O and CO
2. Which ion may form a scummy precipitate with ordinary soap? (soap has a negative charge)
A. HCO3-
B. CO32-
C. Na+
D. Ca2+
3. An element forms a basic oxide with the formula XO and a hydride with the formula XH2. The hydride reacts with water to give hydrogen gas. The element X could be?
A. K
B. Ca
C. N
D. O
4. Which metal reacts with concentrated NaOH to produce hydrogen gas?
A. Al
B. Cu
C. Fe
D. MG
5. In which pair does the named element have the same oxidation number?
A. Sulfur in H2S2O7 and H2SO4
B. Mercury in Hg2+ and Hg22+
C. Oxygen in Na2O2 and H2O
D. Cobalt in Co(NH3)62+ and Co(NO3)2 …show more content…
Metallic zinc is the reducing agent
B. Metallic zinc is reduced
C. Copper ion is oxidized
D. Sulfate ion in the reducing agent
10. In which set are the substances arranged in order of decreasing solubility in water?
A. Al(OH)2 > Mg(OH)2 > NaOH
B. BaSO4 > CaSO4 > MgSO4
C. CaCO3 > NaHCO3 >Na2CO3
D. AgCl > AgBr > AgI
11. What Volume of 10M HCl solution is required to prepare exactly 500 mL of a 0.60M HCl solution?
A. 10mL
B. 14mL
C. 30mL
D. 40mL
12. What is the molarity of a solution made by dissolving 9.56g of sodium acetate(82.03g/mol) in water and diluting to 650mL?
A. 0.179M
B. 1.206M
C. 1.7X10-3M
D. 12.06M
13. A teaching assistant wants to prepare 500ml of 0.10M NaCl solution. Which procedure does she follow?
A. Add 1.46g of NaCl to 500mL of water.
B. Add 2.92g of NaCl to 500ml of water.
C. Dissolve 1.46 g of NaCl in 100mL of water and dilute to 500mL
D. Dissolve 2.92 g of NaCl in 100mL of water and dilute to 500mL
14. A hydrocarbon with the general formula CXHy was burned in air, yielding 0.18g of water and 0.44 g of carbon dioxide. What is the formula?
A. C2H2
B. C2H4
C. C2H6
D. C6H6
15. How many mols of iron react with 1.7mols of oxygen gas to form iron(III) oxide?
A. 2.33mol
B. 1.75mol
C. 1.31mol
D.