MCQOPTIONS
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MCQOPTIONS
This section includes 837 Mcqs, each offering curated multiple-choice questions to sharpen your Grade10 knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
Propane (C3H8) and butane (C4H10) in liquid form are used in |
| A. | oxygen cylinders |
| B. | Liquid Petroleum Gas (LPG) |
| C. | Compressed Natural Gas (CNG) |
| D. | nitrogen cylinders |
| Answer» C. Compressed Natural Gas (CNG) | |
| 452. |
Which of the following is a dangerous intestinal disease that spreads by polluted water containing bacteria? |
| A. | typhoid |
| B. | dysentery |
| C. | amoeba |
| D. | hepatitis |
| Answer» B. dysentery | |
| 453. |
What is the third step of raw water treatment? |
| A. | sedimentation |
| B. | coagulation |
| C. | filtration |
| D. | chlorination |
| Answer» D. chlorination | |
| 454. |
What is the percentage of water from glaciers and ice caps? |
| A. | 0 |
| B. | 0.002 |
| C. | 0.006 |
| D. | 0.021 |
| Answer» E. | |
| 455. |
How many basic steps are involved in sewage water treatment? |
| A. | three |
| B. | four |
| C. | five |
| D. | six |
| Answer» C. five | |
| 456. |
Water exists in how many states? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 457. |
Water that does not give scum with soap is called |
| A. | hard water |
| B. | soft water |
| C. | distilled water |
| D. | alcoholic water |
| Answer» C. distilled water | |
| 458. |
Process in which water is treated with slaked lime and alum is called |
| A. | sedimentation |
| B. | coagulation |
| C. | filtration |
| D. | chlorination |
| Answer» C. filtration | |
| 459. |
What is the general formula of alkenes? |
| A. | CnH2n+2 |
| B. | CnH2n |
| C. | CnH2n-2 |
| D. | CnHn |
| Answer» C. CnH2n-2 | |
| 460. |
An alkane with molecular formula C7H16 is called |
| A. | butane |
| B. | pentane |
| C. | hexane |
| D. | heptane |
| Answer» E. | |
| 461. |
The general formula for amines is |
| A. | R-CH2 |
| B. | R2CH |
| C. | R-NH2 |
| D. | R-COOH |
| Answer» D. R-COOH | |
| 462. |
Alcohols (CnH2n+1OH) are formed by the attachment of |
| A. | OH group to hydrocarbon chain |
| B. | HX group to hydrocarbon chain |
| C. | O to hydrocarbon chain |
| D. | H to hydrocarbon chain |
| Answer» B. HX group to hydrocarbon chain | |
| 463. |
Which of the following is used for artificial ripening of fruits? |
| A. | ethylene |
| B. | acetylene |
| C. | phenol |
| D. | methanol |
| Answer» C. phenol | |
| 464. |
An alkane with molecular formula C4H10 is called |
| A. | butane |
| B. | pentane |
| C. | hexane |
| D. | heptane |
| Answer» B. pentane | |
| 465. |
Considering alkyl radicals, what is the term used for the group obtained by removing terminal hydrogen atom? |
| A. | Iso-propyl |
| B. | n-propyl |
| C. | neo-propyl |
| D. | propyl |
| Answer» C. neo-propyl | |
| 466. |
Compounds that have the same molecular formula but a different arrangement of atoms in their molecules are called |
| A. | isotopes |
| B. | isomers |
| C. | hydrocarbons |
| D. | organic compounds |
| Answer» C. hydrocarbons | |
| 467. |
Groups of atoms that can occur within organic molecules are called |
| A. | cyclic compounds |
| B. | functional groups |
| C. | homologous series |
| D. | none of above |
| Answer» C. homologous series | |
| 468. |
In destructive distillation, coal is converted to |
| A. | coal gas, coal tar and coke |
| B. | petrol and methane |
| C. | natural gas and coke |
| D. | coal tar and petrol |
| Answer» B. petrol and methane | |
| 469. |
Simple alkanes (saturated hydrocarbons) are |
| A. | straight chain hydrocarbons |
| B. | branched chain hydrocarbons |
| C. | no chain hydrocarbons |
| D. | none of above |
| Answer» B. branched chain hydrocarbons | |
| 470. |
Additional atoms or group of atoms attached to hydrocarbons is |
| A. | functional group |
| B. | non functional group |
| C. | alkaline group |
| D. | alkene group |
| Answer» B. non functional group | |
| 471. |
What is the major starting material for the manufacture of organic chemicals and products such as plastic? |
| A. | ethylene |
| B. | acetylene |
| C. | phenol |
| D. | methanol |
| Answer» B. acetylene | |
| 472. |
What is the term used for hydrocarbons containing carbon-carbon multiple bonds? |
| A. | saturated hydrocarbons |
| B. | unsaturated hydrocarbons |
| C. | alkanes |
| D. | none of above |
| Answer» C. alkanes | |
| 473. |
Which of the following is used in the preparation of polymers like PVC? |
| A. | ethylene |
| B. | acetylene |
| C. | phenol |
| D. | methanol |
| Answer» C. phenol | |
| 474. |
The organic compound used for artificial ripening of fruits is |
| A. | methane |
| B. | ethane |
| C. | propane |
| D. | acetylene |
| Answer» E. | |
| 475. |
What is the term used for unsaturated hydrocarbons containing at least one carbon-carbon triple bond? |
| A. | alkanes |
| B. | alkenes |
| C. | alkynes |
| D. | none of above |
| Answer» D. none of above | |
| 476. |
Considering dimethyl, how many carbon atoms is the oxygen atom bonded to? |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» C. three | |
| 477. |
Hydrocarbons and their derivatives are called |
| A. | isomers |
| B. | isotopes |
| C. | inorganic compounds |
| D. | organic compounds |
| Answer» E. | |
| 478. |
Organic compounds are only soluble in |
| A. | non-polar solvents |
| B. | polar solvents |
| C. | metallic solvents |
| D. | non-metallic solvents |
| Answer» B. polar solvents | |
| 479. |
What is the term used for a formula that describes the arrangement of atoms in a molecule? |
| A. | molecular formula |
| B. | structural formula |
| C. | condensed formula |
| D. | none of above |
| Answer» C. condensed formula | |
| 480. |
The phenomena in which compounds have the same molecular formula but different structures are called |
| A. | multimerism |
| B. | isomerism |
| C. | catenation |
| D. | allomerism |
| Answer» C. catenation | |
| 481. |
What is the term used for a series of related compounds in which any two adjacent molecules differ by -CH2- group? |
| A. | cyclic compounds |
| B. | functional groups |
| C. | homologous series |
| D. | none of above |
| Answer» D. none of above | |
| 482. |
Taste of acid is |
| A. | sour |
| B. | sweet |
| C. | bitter |
| D. | it is tasteless |
| Answer» B. sweet | |
| 483. |
What is formed when the replaceable hydrogen atoms in acid are completely or partially replaced by metal atoms? |
| A. | water |
| B. | amphoteric substance |
| C. | base |
| D. | salt |
| Answer» E. | |
| 484. |
During etching, a piece of metal or glass is covered with |
| A. | acid |
| B. | base |
| C. | wax |
| D. | water |
| Answer» D. water | |
| 485. |
What is the color of Bromothymol blue in acidic solution? |
| A. | red |
| B. | yellow |
| C. | blue |
| D. | colorless |
| Answer» C. blue | |
| 486. |
Which of the following is used in soap making and drain cleaners? |
| A. | sodium hydroxide |
| B. | potassium hydroxide |
| C. | calcium hydroxide |
| D. | magnesium hydroxide |
| Answer» B. potassium hydroxide | |
| 487. |
Which of the following is a group of atoms obtained by removing one hydrogen atom from an alkane? |
| A. | alkene |
| B. | alkyne |
| C. | functional group |
| D. | alkyl radical |
| Answer» E. | |
| 488. |
Process in which coal is heated in the absence of air at high temperature and converted into coal gas, coal tar, and coke is called |
| A. | destructive distillation |
| B. | distillation |
| C. | burning of coal |
| D. | burning of oxygen |
| Answer» B. distillation | |
| 489. |
Methyl has the molecular formula |
| A. | CH4 |
| B. | CH3 |
| C. | CH |
| D. | CH2 |
| Answer» C. CH | |
| 490. |
Compounds in which one hydrogen atom of an alkane is substituted by one halogen atom are called |
| A. | halo alkanes |
| B. | phenols |
| C. | ethers |
| D. | alcohols |
| Answer» B. phenols | |
| 491. |
Ethers are formed by the attachment of |
| A. | two alkyl groups to same oxygen atom |
| B. | two alkyl group to different oxygen atoms |
| C. | three alkyl groups to one oxygen atom |
| D. | four alkyl groups to one oxygen atom |
| Answer» B. two alkyl group to different oxygen atoms | |
| 492. |
Unit of equilibrium constant for PCl5 PCl3 + Cl2 |
| A. | no units |
| B. | mol dm-3 |
| C. | dm3mol-1 |
| D. | [mol dm-3]-2 |
| Answer» C. dm3mol-1 | |
| 493. |
Unit of the equilibrium constant for 2NO + O2 2NO2 is |
| A. | no units |
| B. | mol dm-3 |
| C. | dm3mol-1 |
| D. | dm3mol-2 |
| Answer» D. dm3mol-2 | |
| 494. |
The rate at which the reaction proceeds is directly related to |
| A. | active masses of reactants |
| B. | sum of active masses of reactants |
| C. | product of active masses of reactants |
| D. | ratio of active masses of reactants |
| Answer» D. ratio of active masses of reactants | |
| 495. |
Which process is used for the large scale production of sulphuric acid? |
| A. | contact process |
| B. | Haber process |
| C. | sulphuric acid process |
| D. | none of above |
| Answer» B. Haber process | |
| 496. |
Which of the following is used as a catalyst in the contact process? |
| A. | Zeolite |
| B. | Ag |
| C. | Pd |
| D. | Pt |
| Answer» E. | |
| 497. |
Which of the following reactions causes acid droplets to spew in all directions? |
| A. | acid base reaction |
| B. | combustion |
| C. | vigorous reaction |
| D. | decomposition |
| Answer» D. decomposition | |
| 498. |
The law of mass action was proposed by |
| A. | Newton |
| B. | Le Chatellier |
| C. | C.M Guldberg and P.Waage |
| D. | Lewis |
| Answer» D. Lewis | |
| 499. |
Which of the following statements about the equilibrium constant is not true? |
| A. | it is very useful |
| B. | it is independent of the initial concentration of reactants |
| C. | it does not depend upon temperature |
| D. | it depends upon temperature |
| Answer» D. it depends upon temperature | |
| 500. |
Unit of the equilibrium constant for N2O4 2NO2 is |
| A. | mol dm-4 |
| B. | mol dm-3 |
| C. | dm3mol-1 |
| D. | mol dm-3 |
| Answer» C. dm3mol-1 | |