MCQOPTIONS
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MCQOPTIONS
This section includes 204 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the volume strength of H2O2 of its 11.2 ml requires 30 ml of 0.5 M 2Cr2O7? |
| A. | 35 |
| B. | 55 |
| C. | 25 |
| D. | 45 |
| Answer» E. | |
| 2. |
How many moles of KMnO4 are required for complete oxidation of 1.25 mol Cu2S? Cu2S → Cu+2 + SO2 |
| A. | 1 mole |
| B. | 3 moles |
| C. | 2 moles |
| D. | 5 moles |
| Answer» D. 5 moles | |
| 3. |
How many moles of KCI are required to produce 10 mol Cl2 by the reaction with KCIO3? |
| A. | 1.66 mole |
| B. | 13.33 mole |
| C. | 0.66 mole |
| D. | 16.66 mole |
| Answer» E. | |
| 4. |
What is the concentration of H2O2 solution of 20 ml of H2O2 solution which will react completely with 10 ml of 2 M KMnO4 in acidic medium? |
| A. | 1.25 M |
| B. | 5 M |
| C. | 2.5 M |
| D. | 25 M |
| Answer» D. 25 M | |
| 5. |
What is the mass of Fe304 if it reacts completely with 25 ml of 0.3m K2Cr2O7? |
| A. | 1 .44 g |
| B. | 10.44 g |
| C. | 104.4 g |
| D. | 14.4 g |
| Answer» C. 104.4 g | |
| 6. |
What is the volume of 0.05 M KMnO4 which will react with 50 ml of 0.1 M H2S in acidic medium (H2S → S02)? |
| A. | 60 ml |
| B. | 6 ml |
| C. | 12 ml |
| D. | 120 ml |
| Answer» E. | |
| 7. |
What is the mass of K2Cr2O7 required to produce 254 gm I2 from KI solution? Given: K2Cr2O7 + 2KI → 2Cr3+ + I2 |
| A. | 49 g |
| B. | 98 g |
| C. | 9.8 g |
| D. | 4.9 g |
| Answer» C. 9.8 g | |
| 8. |
How many number of moles of KMnO4 will react with 180 gm H2C2O4 according to given reaction?KMnO4 + H2C2O4 → 2C02 + Mn2+ |
| A. | 4/5 |
| B. | 2/5 |
| C. | 1/5 |
| D. | 4/3 |
| Answer» B. 2/5 | |
| 9. |
Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it. Which of the statement is incorrect for this reaction? |
| A. | Na2S2O3 is oxidized |
| B. | CuI2 is formed |
| C. | Cu2I2 is formed |
| D. | Evolved I2 is reduced |
| Answer» C. Cu2I2 is formed | |
| 10. |
KMnO4 reacts with oxalic acid according to the equation given below. Here 20 mL of 0.1 M KMnO4 is equivalent to how many mL and molarity of H2C2O4? 2MnO4– + 5C2O4– + 16H+ → 2Mn+1 + 10CO2 + 8H2O |
| A. | 20 mL of 0.5 M H2C2O4 |
| B. | 50 mL of 0.5 M H2C2O4 |
| C. | 50 mL of 0.1 M H2C2O4 |
| D. | 20 mL of 0.1 M H2C2O4 |
| Answer» D. 20 mL of 0.1 M H2C2O4 | |
| 11. |
Consider the equation: Mg(OH)₂(s) + HCl → MgCl₂. The other by product is |
| A. | HO₃⁺ |
| B. | OH⁻ |
| C. | H₂O (l) |
| D. | H₂(g) |
| Answer» D. H₂(g) | |
| 12. |
The acidic oxide below out of the four is |
| A. | Al₂(SO₄)₃ |
| B. | Mg(OH)₂ (aq) |
| C. | Na₂SiO₃ |
| D. | Na₂O |
| Answer» D. Na₂O | |
| 13. |
Element that uses all outer shell electrons in bonding with oxygen is |
| A. | Si only |
| B. | Mg only |
| C. | Al |
| D. | Si and Mg |
| Answer» E. | |
| 14. |
The pH of the Phosphoric acid (H₃PO₄) is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 15. |
Upon oxidation, calcium (Ca) compounds give |
| A. | brick red color |
| B. | scarlet color |
| C. | violet color |
| D. | apple green color |
| Answer» B. scarlet color | |
| 16. |
The reaction NaCl(s) → Na⁺(aq) + Cl⁻(aq) shows that the |
| A. | NaCl reacts with water |
| B. | NaCl is hydrated |
| C. | NaCl is insoluble in water |
| D. | NaCl is hydrolyzed by water |
| Answer» C. NaCl is insoluble in water | |
| 17. |
The oxidation number of Period 3 element arises until it reaches the element |
| A. | Aluminum (Al) |
| B. | Phosphorus (P) |
| C. | Sulfur (S) |
| D. | Silicon (Si) |
| Answer» D. Silicon (Si) | |
| 18. |
A yellow precipitate formed with methyl ketone is |
| A. | tri-iodomethane only |
| B. | iodoform only |
| C. | bromoalkane |
| D. | tri-iodomethane and iodoform |
| Answer» E. | |
| 19. |
An acidic oxide (non-metal oxide) does not react with |
| A. | acids |
| B. | bases |
| C. | salt solution |
| D. | water |
| Answer» B. bases | |
| 20. |
From the metals in a period, the neighboring members differ by |
| A. | multiple neutrons |
| B. | multiple protons |
| C. | multiple electrons |
| D. | none of above |
| Answer» B. multiple protons | |
| 21. |
Acyl chlorides are made by reacting carboxylic acids with |
| A. | PCl₅ |
| B. | PCl₃ |
| C. | SOCl₂ |
| D. | all of above |
| Answer» E. | |
| 22. |
One of the oxides that do not react with water is |
| A. | MgO |
| B. | Al₂(SO₄)₃ |
| C. | SiO₂ |
| D. | Na₂O |
| Answer» D. Na₂O | |
| 23. |
The oxidation number of Na in NaCl is |
| A. | +1 |
| B. | +2 |
| C. | +3 |
| D. | +4 |
| Answer» B. +2 | |
| 24. |
The acidic nature of Aluminum (Al⁺³) and Silicon (Si±⁴) ions can be judged by allowing them to react with |
| A. | water |
| B. | O₂(g) |
| C. | acids |
| D. | alkalis |
| Answer» E. | |
| 25. |
Which statement is correct about the physical properties of elements across the period? |
| A. | they do not change |
| B. | they change |
| C. | melting temperature changes |
| D. | boiling temperature changes |
| Answer» C. melting temperature changes | |
| 26. |
Consider the reaction: Al₂O₃+H₂SO₄ → Al₂(SO₄)₃ + H₂O. Moles of H₂SO₄ required to balance the equation are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 27. |
The reaction in which oxidation and reduction takes place at same time is called as |
| A. | Redox-reaction |
| B. | oxidation reaction |
| C. | reduction reaction |
| D. | none of above |
| Answer» B. oxidation reaction | |
| 28. |
Metal chloride that is hydrolyzed is |
| A. | Al₂Cl₆ |
| B. | SiCl₄ |
| C. | PCl₅ |
| D. | all of above |
| Answer» E. | |
| 29. |
In a positive test, yellow precipitate formed will be of |
| A. | tri-iodomethane` only |
| B. | iodoform only |
| C. | iodo-alkane |
| D. | tri-iodomethane and iodoform |
| Answer» E. | |
| 30. |
Metal that must be kept under oil to avoid contact and reactivity with oxygen is |
| A. | Be |
| B. | Mg |
| C. | Ca |
| D. | Ba |
| Answer» E. | |
| 31. |
In a balanced equation, the number of electrons gain and loss must be |
| A. | equal |
| B. | high |
| C. | low |
| D. | equilibrium |
| Answer» B. high | |
| 32. |
To determine that a substance is oxidized or reduced other factor to consider is |
| A. | electron transfer only |
| B. | changes in oxidation number only |
| C. | proton transfer |
| D. | electron transfer and changes in oxidation number |
| Answer» E. | |
| 33. |
Consider the reaction: Al₂O₃+H₂SO₄ → Al₂(SO₄)₃. The 2nd by-product in this reaction will be |
| A. | HO₃⁺ |
| B. | OH⁻ |
| C. | H₂O(l) |
| D. | H₂(g) |
| Answer» D. H₂(g) | |
| 34. |
Stomach pain and indigestion are relieved when which of the following is taken orally? |
| A. | MgO |
| B. | NaO |
| C. | Al₂(SO₄)₃ |
| D. | nitrogen |
| Answer» B. NaO | |
| 35. |
The pH of the H₂SO₃(aq) is |
| A. | 1 |
| B. | 3 |
| C. | 5 |
| D. | 6 |
| Answer» B. 3 | |
| 36. |
By accepting H⁺ ions from water molecules, metal oxides ions of Period 3 act as |
| A. | acids |
| B. | bases |
| C. | Catalyst |
| D. | metalloids |
| Answer» C. Catalyst | |
| 37. |
The elements in which the outermost electrons are in the same principal quantum shell form the |
| A. | isotopes |
| B. | periods |
| C. | rows |
| D. | Diatic bonds |
| Answer» C. rows | |
| 38. |
Percentage of Fe⁺² can be determined by |
| A. | magnate ion |
| B. | ferrous ion |
| C. | steel ion |
| D. | bronze ion |
| Answer» B. ferrous ion | |
| 39. |
Geranium(IV) is an acidic oxide which has very similar properties to that of |
| A. | silicon |
| B. | silicon dioxide |
| C. | silicon trioxide |
| D. | silicon salt |
| Answer» C. silicon trioxide | |
| 40. |
Consider the reaction: Al₂O₃+NaOH + H₂O (l) → NaAl(OH)₄ (aq). Moles of H₂O required to balance the equation are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 41. |
The formula Na₂O shows Na oxidation number to be |
| A. | +1 |
| B. | +2 |
| C. | - 1 |
| D. | -2 |
| Answer» B. +2 | |
| 42. |
During formation of oxides electrons are transferred from sodium, magnesium and aluminum to |
| A. | oxygen |
| B. | nitrogen |
| C. | carbon dioxide |
| D. | carbon monoxide |
| Answer» B. nitrogen | |
| 43. |
Upon reaction with NaOH, Silicon dioxide (SiO₂) acts as |
| A. | an acid |
| B. | as an alkali |
| C. | a solution |
| D. | a gas |
| Answer» B. as an alkali | |
| 44. |
Sulfur dioxide (SO₂) and sulfur trioxide (SO₃) react and dissolve in water yielding |
| A. | basic solutions |
| B. | acidic solutions |
| C. | alkalis |
| D. | halogens |
| Answer» C. alkalis | |
| 45. |
Which of the given metals of Period 3 use the outer shell electrons in bonding with Chlorine? |
| A. | Sodium (Na) |
| B. | Aluminum (Al) |
| C. | Silicon (Si) |
| D. | all of above |
| Answer» E. | |
| 46. |
The ions which are formed by the combination of two or more different atoms are called |
| A. | complex ions |
| B. | compound ions |
| C. | cations |
| D. | anions |
| Answer» C. cations | |
| 47. |
An example of Amphoteric compound could be |
| A. | MgO |
| B. | Al₂(SO₄)₃ |
| C. | Mg(OH)₂ (aq) |
| D. | Na₂SiO₃ |
| Answer» C. Mg(OH)₂ (aq) | |
| 48. |
Silicon dioxide is insoluble in |
| A. | water |
| B. | alkali |
| C. | acid |
| D. | base |
| Answer» B. alkali | |
| 49. |
Bromine reacts with phenol and decolorize orange color and turns it to |
| A. | white precipitate |
| B. | pink precipitate |
| C. | blue precipitate |
| D. | black precipitate |
| Answer» B. pink precipitate | |
| 50. |
The reaction of Phenol with alkali results in a |
| A. | salt only |
| B. | water only |
| C. | gas |
| D. | salt and water |
| Answer» E. | |