MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
To balance Al(OH)₃ + HNO₃ → Al(NO₃)₃ + H₂O, number of Al(OH)₃ molecules will be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 2. |
Natrium is Latin name for |
| A. | Nickel |
| B. | Nitrogen |
| C. | sodium |
| D. | Stannum |
| Answer» D. Stannum | |
| 3. |
Formula of copper carbonate is |
| A. | CuCO₃ |
| B. | CuCO₂ |
| C. | CuCHO₃ |
| D. | CuCOH |
| Answer» B. CuCO₂ | |
| 4. |
Substance is treated both as a radical and an element. It is |
| A. | sulphate |
| B. | hydrogen |
| C. | carbonate |
| D. | Phosphorus |
| Answer» C. carbonate | |
| 5. |
All are examples of radicals except |
| A. | hydroxide |
| B. | Sulphate |
| C. | ammonium |
| D. | aluminum |
| Answer» E. | |
| 6. |
Valency of hydroxide ion (OH) is |
| A. | -1 |
| B. | -2 |
| C. | -3 |
| D. | -4 |
| Answer» B. -2 | |
| 7. |
A water molecule will always contain |
| A. | 11% of oxygen and 89% of hydrogen |
| B. | 18% of oxygen and 88% of hydrogen |
| C. | 11.11% of oxygen and 88.89% of hydrogen |
| D. | 15% of oxygen |
| Answer» D. 15% of oxygen | |
| 8. |
Formula of Hydrogen Carbonate ion is |
| A. | HCO₂ |
| B. | HCO₃ |
| C. | HCO₄ |
| D. | H₂CO₃ |
| Answer» C. HCO₄ | |
| 9. |
In Na₂CO₃.10H₂O, percentage of oxygen is |
| A. | 0.1678 |
| B. | 0.1608 |
| C. | 0.1659 |
| D. | 0.1684 |
| Answer» B. 0.1608 | |
| 10. |
All of these ions have a valency of +2 except |
| A. | Pb |
| B. | Ca |
| C. | Zn |
| D. | NH₄ |
| Answer» E. | |
| 11. |
Formula of aluminum sulphate indicates that |
| A. | for each ion of Al, two ions of sulphate are required |
| B. | for each ion of Al, three ions of sulphate are required |
| C. | for two ions of Al, 3 ions of sulphate are required |
| D. | for two ions of Al, three ions of sulphate are required |
| Answer» D. for two ions of Al, three ions of sulphate are required | |
| 12. |
Charge on an ion is a measure of its |
| A. | valency |
| B. | exponential notation |
| C. | formula |
| D. | isotopic charges |
| Answer» B. exponential notation | |
| 13. |
Color gas is |
| A. | methane |
| B. | ethane |
| C. | propane |
| D. | butane |
| Answer» E. | |
| 14. |
If an acid reacts with a carbonate, product will always include |
| A. | H₂O (l) |
| B. | a salt (s) |
| C. | CO₂ (g) |
| D. | all of these |
| Answer» E. | |
| 15. |
Relative formula mass of aluminum sulphate (NH₄)₂SO₄ is |
| A. | 132.14g/mol |
| B. | 113.14g/mol |
| C. | 139.33g/mol |
| D. | 143.69g/mol |
| Answer» B. 113.14g/mol | |
| 16. |
Formula of Calcium Hydrogen Carbonate is |
| A. | HCO₃Ca₂ |
| B. | Ca(HCO₃)₃ |
| C. | Ca(HCO₃)₂ |
| D. | Ca₂(HCO₃)₂ |
| Answer» D. Ca₂(HCO₃)₂ | |
| 17. |
In CuO (Copper Oxide), valency of Copper is |
| A. | +1 |
| B. | +2 |
| C. | −1 |
| D. | −2 |
| Answer» C. −1 | |
| 18. |
In order to get Sodium Sulfite (Na₂SO₃) as product, reactants shall be Sulfur Dioxide (SO₂) and |
| A. | Na₂CO₃ |
| B. | NaOH |
| C. | NaCl |
| D. | both a and b |
| Answer» E. | |
| 19. |
Relative molecular mass of Na₂CO₃ is |
| A. | 98 |
| B. | 128 |
| C. | 286 |
| D. | 198 |
| Answer» D. 198 | |
| 20. |
Formula of Ammonium Sulfate ((NH₄)₂SO₄) is |
| A. | NH₄(SO₄)₂ |
| B. | NH₄(HSO₄)₂ |
| C. | (NH₄)₂SO₄ |
| D. | (NH₃)2SO₃ |
| Answer» D. (NH₃)2SO₃ | |
| 21. |
Variable valencies are used to indicate ions |
| A. | greater than +1 |
| B. | greater than −1 |
| C. | with more than one valency |
| D. | all of these |
| Answer» D. all of these | |
| 22. |
Product obtained from additional polymerization includes |
| A. | water |
| B. | only polymer |
| C. | polyesters |
| D. | polyamides |
| Answer» C. polyesters | |
| 23. |
Valency of carbonate ion CO₃? is |
| A. | -1 |
| B. | -2 |
| C. | -3 |
| D. | -4 |
| Answer» B. -2 | |
| 24. |
All are covalent compounds except |
| A. | NO₂ |
| B. | SO₃ |
| C. | SO₂ |
| D. | HNO₃ |
| Answer» E. | |
| 25. |
Empirical formula is the |
| A. | simplest formula |
| B. | molecular formula |
| C. | chemical formula |
| D. | ionic exponential formula |
| Answer» B. molecular formula | |
| 26. |
All of these radicals have a valency of 2, except |
| A. | SO₄ |
| B. | CO₃ |
| C. | NH₄ |
| D. | MgCO₃ |
| Answer» D. MgCO₃ | |
| 27. |
Formula of hydrated Sodium Carbonate is |
| A. | Na(HCO₃)₂ |
| B. | Na₂CO₃.(H₂O)₅ |
| C. | Na₂CO₃.10H₂O |
| D. | Na3CO₄.10H₂O |
| Answer» D. Na3CO₄.10H₂O | |
| 28. |
Chemical formula of silver bromide is |
| A. | Ag₂Br₃ |
| B. | AgBr |
| C. | AgBrO |
| D. | AgBr₃.H₂O |
| Answer» C. AgBrO | |
| 29. |
Chemical formula of Zinc Hydroxide is |
| A. | Zn(OH)₂ |
| B. | ZNO₂ |
| C. | Zn₂(OH)₃ |
| D. | ZnOH |
| Answer» B. ZNO₂ | |
| 30. |
Valency of Carbon (C) is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 31. |
Molecular weight of propane (C₃H₈) is |
| A. | 44.095g/mol |
| B. | 40.01g/mol |
| C. | 41.01g/mol |
| D. | 46.02g/mol |
| Answer» B. 40.01g/mol | |
| 32. |
All are ionic compounds except |
| A. | AgCl |
| B. | HNO₃ |
| C. | NO₂ |
| D. | (NH₄)₂CO₃ |
| Answer» D. (NH₄)₂CO₃ | |
| 33. |
A student-wrote three statements about rancidity:I. When fats and oils are reduced, they become rancid.II. Chips manufacturers usually flush chips bags with oxygen to prevent rancidity.III. Rancidity is prevented by adding substances called antioxidants to food.Choose the correct statement(s). |
| A. | I only |
| B. | II and III only |
| C. | It will supply oxygen to the burning fire. |
| D. | All of these |
| Answer» D. All of these | |
| 34. |
Rupali, a class 10 student has set up the apparatus as shown in the figures. Which of the following observations is correct? |
| A. | Temperature of beakers I, II and III will be raised as dissolution of salts is an exothermic process. |
| B. | Temperature of beakers III and IV will be raised while temperature of beakers I and II will fall. |
| C. | Spontaneous combustion |
| D. | None of these |
| Answer» C. Spontaneous combustion | |
| 35. |
Read the given passage and fill in the blanks by choosing an appropriate option.When a limited quantity of water is sprinkled over a dirty white stone called ___i___, an ___ii___ reaction takes place. After some time, the stone like substance changes into white amorphous powder called, ___iii___ which is used for ___iv___. |
| A. | (i)(ii)(iii)(iv)Plaster of PairsExothermicQuick limeMedical purposes |
| B. | (i)(ii)(iii)(iv)Quick limeExothermicSlaked limeWhite washing |
| C. | Carbon dioxide and hydrogen are produced |
| D. | (i)(ii)(iii)(iv)Calcium carbonateEndothermicCalcium oxideWhite washing |
| Answer» C. Carbon dioxide and hydrogen are produced | |
| 36. |
Which of the given chemical equations is NOT balanced? |
| A. | \[3Fe+4{{H}_{2}}O\to F{{e}_{3}}{{O}_{4}}+4{{H}_{2}}\] |
| B. | \[KCl{{O}_{3}}\to KCl+{{O}_{2}}\] |
| C. | Candle |
| D. | \[Mg+2HCl\,\to \,MgC{{l}_{2}}+{{H}_{2}}\] |
| Answer» C. Candle | |
| 37. |
Which of the following chemical reactions is balanced and also undergoes combustion? |
| A. | \[{{C}_{3}}{{H}_{8}}+5{{O}_{2}}\to 3C{{O}_{2}}+4{{H}_{2}}O\] |
| B. | \[6C{{O}_{2}}+12{{H}_{2}}O\to {{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{O}_{2}}+6{{H}_{2}}O\] |
| C. | A good fuel has moderate rate of combustion. |
| D. | \[2Al+3{{H}_{2}}S{{O}_{4}}\to A{{l}_{2}}{{(S{{O}_{4}})}_{3}}+3{{H}_{2}}\] |
| Answer» B. \[6C{{O}_{2}}+12{{H}_{2}}O\to {{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{O}_{2}}+6{{H}_{2}}O\] | |
| 38. |
How is the decomposition of silver chloride carried out? |
| A. | By electricity |
| B. | By sunlight |
| C. | Light |
| D. | By water |
| Answer» C. Light | |
| 39. |
In which reaction do two compounds exchange their ions to form two new compounds? |
| A. | Displacement reaction |
| B. | Double displacement reaction |
| C. | Biomass |
| D. | Decomposition reaction |
| Answer» C. Biomass | |
| 40. |
What is the reaction in which a substance or substances undergo change to produce new substances with new properties called? |
| A. | A biochemical reaction |
| B. | A nuclear reaction |
| C. | Coal tar |
| D. | A chemical reaction |
| Answer» E. | |
| 41. |
Which type of reaction is given below? \[CuS{{O}_{4}}+Fe\xrightarrow{{}}FeS{{O}_{4}}+Cu\] |
| A. | Neutralisation |
| B. | Combination |
| C. | a-3, b-2, c-4, d-1 |
| D. | Decomposition |
| E. | None of these |
| Answer» D. Decomposition | |
| 42. |
The destruction of a material containing metals due to chemical reactions with its surroundings is called: |
| A. | Rancidity |
| B. | Photosynthesis |
| C. | In the middle portion |
| D. | Corrosion |
| E. | None of these |
| Answer» E. None of these | |
| 43. |
The equation given below depicts which type of chemical reaction? \[A+BC\to AC+B\] |
| A. | Combustion |
| B. | Combination |
| C. | Partially burnt carbon particles. |
| D. | Single displacement |
| E. | None of these |
| Answer» E. None of these | |
| 44. |
Which one of the following is true, if a substance has a pH value of 7? |
| A. | The substance is a base. |
| B. | The substance is an acid. |
| C. | Lubricating |
| D. | Either [a] and [b] |
| E. | None of these |
| Answer» D. Either [a] and [b] | |
| 45. |
Which one of the following is true, if a substance has a pH value of 4? |
| A. | The substance is a base. |
| B. | The substance is an acid. |
| C. | Paints |
| D. | Either [a] or [b] |
| E. | None of these |
| Answer» C. Paints | |
| 46. |
Which one of the following is formed when sodium hydrogen carbonate reacts with hydrochloric acid? |
| A. | Sodium chloride |
| B. | Carbon dioxide |
| C. | (i), (ii) and (iv) |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 47. |
Which one of the following is commonly known as blue vitriol and is used as a fungicide? |
| A. | Potassium nitrate |
| B. | Copper sulphate |
| C. | Maintaining correct levels of pressure in the tyres |
| D. | Sodium chloride |
| E. | None of these |
| Answer» C. Maintaining correct levels of pressure in the tyres | |
| 48. |
In which one of the following reactions a salt is reacting with a base? |
| A. | \[NaOH+HCl\xrightarrow{{}}NaCl+{{H}_{2}}O\] |
| B. | \[Cu{{(OH)}_{2}}+{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}CuS{{O}_{4}}+2{{H}_{2}}O\] |
| C. | A is correct and R is wrong. |
| D. | \[6N{{H}_{4}}OH+Al{{(S{{O}_{4}})}_{3}}\xrightarrow{{}}2Al{{(OH)}_{3}}\]\[+3{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\] |
| E. | None of these |
| Answer» E. None of these | |
| 49. |
Match the following: Column A Column B (i) Chalk [A] \[{{C}_{a}}O\] (ii) Quick lime [B] \[{{C}_{a}}{{(OH)}_{2}}\] (iii) Slaked lime [C] \[NaHC{{O}_{3}}\] (iv) Sodium bicarbonate [D] \[{{C}_{a}}C{{O}_{3}}\] |
| A. | (i - D), (ii- B), (iii - A), (iv - C) |
| B. | (i - D), (ii - A), (iii - B), (iv - C) |
| C. | Moth balls |
| D. | (i - C), (ii - D), (iii - B), (iv - A) |
| E. | None of these |
| Answer» C. Moth balls | |
| 50. |
Which one among the following is a weak base? |
| A. | Sodium hydroxide |
| B. | Potassium hydroxide |
| C. | CROFK |
| D. | All the above |
| E. | None of these |
| Answer» D. All the above | |