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MCQOPTIONS
This section includes 1777 Mcqs, each offering curated multiple-choice questions to sharpen your 9th Class knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Identify the freezing point of pure water, |
| A. | \[-{{4}^{o}}C\] |
| B. | \[{{100}^{o}}C\] |
| C. | \[{{10}^{o}}C\] |
| D. | \[{{0}^{o}}C\] |
| Answer» E. | |
| 552. |
Which one of the following statements is correct? Statement 1: In solids, molecules are tightly packed. Statement 2: Force of attraction between molecules in solids is very weak. |
| A. | Statement 1 only |
| B. | Statement 2 only |
| C. | Both statements are correct |
| D. | Both statements are incorrect |
| E. | None of these |
| Answer» B. Statement 2 only | |
| 553. |
Direction: Study the given graph carefully and answer the following question. What is the physical state of matter at points 1, 3 and 5 respectively? |
| A. | 1-Solid, 3-Liquid, 5-Gas |
| B. | 1-Solid, 3-Gas, 5-Liquid |
| C. | 1-Liquid, 3-Gas, 5-Solid |
| D. | 1-Liquid, 3-Solid, 5-Gas |
| Answer» B. 1-Solid, 3-Gas, 5-Liquid | |
| 554. |
Which of the following is heterogeneous in nature? |
| A. | True solution |
| B. | Colloid |
| C. | Suspension |
| D. | Both [b] and [c] |
| E. | None of these |
| Answer» E. None of these | |
| 555. |
What happens when ice is converted into water? |
| A. | Heat is absorbed |
| B. | Heat is released |
| C. | Temperature increases |
| D. | Temperature decreases |
| Answer» B. Heat is released | |
| 556. |
Which one of the following is a colloid? |
| A. | Cheese |
| B. | Ice cream |
| C. | Milk |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 557. |
A mixture of sand and iodine can be separated by: |
| A. | Filtration |
| B. | Evaporation |
| C. | Sublimation |
| D. | Decantation |
| E. | None of these |
| Answer» D. Decantation | |
| 558. |
A student finds that as he blows air into a balloon, it becomes bigger. What inference can he make from the above? |
| A. | Air is a gas. |
| B. | Air has mass |
| C. | Air is matter |
| D. | Air occupies space |
| Answer» E. | |
| 559. |
When does the thermal energy of a body increase? |
| A. | When the K.E, of the body decreases. |
| B. | When the P.E. of the body increases |
| C. | When the mechanical energy of the body decreases |
| D. | When the K.E. of molecules in a body increases |
| Answer» E. | |
| 560. |
Which of the following processes involve absorption of energy? |
| A. | Only (i) and (ii) |
| B. | Only (ii) and (iii) |
| C. | Only (i) and (iii) |
| D. | (i), (ii) and (iii) |
| Answer» B. Only (ii) and (iii) | |
| 561. |
Why does a book is solid at room temperature? |
| A. | It has fixed shape. |
| B. | It has fixed volume. |
| C. | It cannot flow. |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 562. |
Identify the normal temperature of the human body. |
| A. | \[{{40}^{o}}F\] |
| B. | \[{{40}^{o}}C\] |
| C. | \[{{37}^{o}}C\] |
| D. | \[{{37}^{o}}F\] |
| Answer» D. \[{{37}^{o}}F\] | |
| 563. |
Which of the following will diffuse faster than the others? |
| A. | Water |
| B. | Petrol |
| C. | Perfume |
| D. | Milk |
| Answer» D. Milk | |
| 564. |
The process behind disappearing of nephthalene balls with time is known as: |
| A. | Melting |
| B. | Condensation |
| C. | Sublimation |
| D. | Matter |
| E. | None of these |
| Answer» D. Matter | |
| 565. |
Vapourisation takes place: |
| A. | At all temperatures. |
| B. | At melting point of the liquid. |
| C. | At the boiling point of, the liquid. |
| D. | At the freezing point of the liquid. |
| E. | None of these |
| Answer» D. At the freezing point of the liquid. | |
| 566. |
Which of the following water molecules \[W,\,\,X,\,\,Y\] or \[Z\] can easily escape to form water vapour? |
| A. | \[W\] |
| B. | \[X\] |
| C. | \[Y\] |
| D. | \[Z\] |
| Answer» C. \[Y\] | |
| 567. |
Match column I with column II and select the correct option from the codes given below. Column I Column II (P) Liquid (i) Highly compressible (Q) Gas (ii) Definite volume (R) Plasma (iii) Super low density (S) Bose-Einstein condensate (iv) Super energetic |
| A. | (P) - (i), (Q) - (ii), (R) - (iii), (S) - (iv) |
| B. | (P) - (ii), (Q) - (i), (R) - (iii), (S) - (iv) |
| C. | (P) - (ii), (Q) - (i), (R) - (iv), (S) - (iii) |
| D. | (P) - (iii), (Q) - (i), (R) - (ii), (S) - (iv) |
| Answer» D. (P) - (iii), (Q) - (i), (R) - (ii), (S) - (iv) | |
| 568. |
When the vapour pressure of a liquid is equal to the atmospheric pressure, what happens to the liquid? |
| A. | The liquid freezes. |
| B. | The liquid evaporates. |
| C. | The liquid boils. |
| D. | The liquid does not undergo any change. |
| Answer» D. The liquid does not undergo any change. | |
| 569. |
Which one of the following statements is not correct about solid? |
| A. | Solids have fixed shape |
| B. | Solids have fixed volume |
| C. | Solids can flow |
| D. | Solids have high densities |
| E. | None of these |
| Answer» D. Solids have high densities | |
| 570. |
Which of the following represents the correct increasing order of the densities of given substances? |
| A. | Cotton < Exhaust from chimneys > Honey < Iron < Air |
| B. | Air < Exhaust from chimneys < Cotton < Honey < Iron |
| C. | Cotton < Air < Exhaust from chimneys < Iron < Honey |
| D. | Air < Cotton < Exhaust from chimneys < Iron < Honey |
| Answer» C. Cotton < Air < Exhaust from chimneys < Iron < Honey | |
| 571. |
Which of the following has a direct effect on the K.E. of particles? |
| A. | Pressure |
| B. | Potential energy |
| C. | Temperature |
| D. | All of the above |
| Answer» D. All of the above | |
| 572. |
Which one of the following is a liquid non-metal? |
| A. | Gallium |
| B. | Bromine |
| C. | Lead |
| D. | Hydrogen |
| E. | None of these |
| Answer» C. Lead | |
| 573. |
Observe the given diagram showing change in state carefully. Which of the following is correct identification for processes P to U? |
| A. | Q\[\to \]Vaporisation, S\[\to \]Liquification, U\[\to \]Solidification |
| B. | P\[\to \]Melting, Q\[\to \]Condensation, S\[\to \]Solidification |
| C. | S\[\to \]Sublimation, P\[\to \]Liquification, U\[\to \]Solidification |
| D. | P\[\to \]Fusion, R\[\to \]Condensation, T and U\[\to \]Sublimation |
| Answer» E. | |
| 574. |
Diagrams W, X and Y show how the particles of a substance are packed at different temperatures. The given graph shows the temperature changes which occur on warming the substance. In which region of the graph would all the particles be packed as in Y? |
| A. | I |
| B. | II |
| C. | III |
| D. | IV |
| Answer» D. IV | |
| 575. |
Why can't solids be compressed? |
| A. | The inter-particle attractive forces are very weak. |
| B. | The movement of the constituent particles are not restricted. |
| C. | The constituent particles are closely packed. |
| D. | None of the above. |
| Answer» D. None of the above. | |
| 576. |
Which of the following metals is NOT a solid at room temperature? |
| A. | Iron |
| B. | Aluminium |
| C. | Mercury |
| D. | Steel |
| Answer» D. Steel | |
| 577. |
Which of the following is an example of suspension? |
| A. | Solution of sugar and water |
| B. | Muddy water |
| C. | Milk |
| D. | Crystal of copper sulphate |
| E. | None of these |
| Answer» C. Milk | |
| 578. |
Observe the given figure carefully. Which of the following statements is incorrect? |
| A. | Processes I, II and III are endothermic while processes IV, V and VI are exothermic. |
| B. | Water vapours formed during process II when come in contact with skin give out \[\text{22}\text{.5}\times \text{1}{{\text{0}}^{5}}\text{ J/kg}\] more heat than the boiling water. |
| C. | Latent heat for process I is \[\text{3}\text{.34 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{6}}}\text{ J/kg}\] |
| D. | None of these. |
| Answer» E. | |
| 579. |
Why does a gas from a small container when transferred to a larger container occupy all the space available? |
| A. | Gas has no definite mass. |
| B. | Gas has no definite shape. |
| C. | Gas has no definite volume. |
| D. | Gas has no definite density. |
| Answer» D. Gas has no definite density. | |
| 580. |
Choose the correct statements about plasma state. I. The state consists of super energetic and super excited particles. II. The particles of plasma state are in the form of ionised gases. III. The plasma is created on stars. IV. Colour of plasma glow depends on temperature of gas only. |
| A. | I, II and III |
| B. | I and II |
| C. | II and III |
| D. | All of these |
| Answer» B. I and II | |
| 581. |
Calculate the temperature at which both the Celsius and Fahrenheit scales show the same reading? |
| A. | \[40\,\,K\] |
| B. | \[{{100}^{o}}F\] |
| C. | \[-{{40}^{o}}C\] |
| D. | \[-{{100}^{o}}C\] |
| Answer» D. \[-{{100}^{o}}C\] | |
| 582. |
Which of the following elements is a non-metal? |
| A. | Mercury |
| B. | Potassium |
| C. | Carbon |
| D. | Calcium |
| E. | None of these |
| Answer» D. Calcium | |
| 583. |
Which of the following statements is incorrect for metal? |
| A. | They are poor conductors of electricity. |
| B. | They are ductile. |
| C. | They are malleable. |
| D. | All the above |
| E. | None of these |
| Answer» B. They are ductile. | |
| 584. |
Bromine has a melting point of \[-{{7.2}^{o}}C\] and a boiling point of\[{{59}^{o}}C\]. At what temperature will bromine have a definite volume but no definite shape? |
| A. | \[{{65}^{o}}C\] |
| B. | \[{{36}^{o}}C\] |
| C. | \[-{{26}^{o}}C\] |
| D. | \[98\,\,K\] |
| Answer» C. \[-{{26}^{o}}C\] | |
| 585. |
Fill in the blanks P, Q, R and S left in the table with appropriate words.PropertiesSolidLiquidGasInter particle spacesVery lessComparatively large___P___Intermolecular Forces___Q___WeakVery weakCompressibility___R___Very SmallHighDiffusionNegligible___S___Very Fast |
| A. | PQRS Very largeStrongNegligibleSlow |
| B. | PQRS LargeWeakSmallFastest |
| C. | PQRS LessStrongHighSlow |
| D. | PQRS LargeStrongStrongFast |
| Answer» B. PQRS LargeWeakSmallFastest | |
| 586. |
Which of the following is an example of metalloid? |
| A. | Coal |
| B. | Coke |
| C. | Copper |
| D. | Boron |
| E. | None of these |
| Answer» E. None of these | |
| 587. |
An experiment is performed as shown in the given figure. The conclusion we can draw from the above experiment is that |
| A. | Nature of matter is continuous |
| B. | Matter is made up of particles |
| C. | Particles of salt get into the spaces between the particles of water |
| D. | Both (b) and (c). |
| Answer» E. | |
| 588. |
What happens to the inter-particle attractive forces with an increase in the distance between the particles? |
| A. | They increase. |
| B. | They decrease. |
| C. | They increase moderately. |
| D. | They remain the same. |
| Answer» C. They increase moderately. | |
| 589. |
Which of the following materials falls in the category of pure substances? |
| A. | Air |
| B. | Mercury |
| C. | Muddy water |
| D. | Milk |
| E. | None of these |
| Answer» C. Muddy water | |
| 590. |
An organic compound ‘X’ has a melting point of - \[33{}^\circ C\] and a boiling point of \[66{}^\circ C.\]The physical states of substance ‘X’ at temperature - \[100{}^\circ C,\] \[0{}^\circ C\] and \[100{}^\circ C\] are respectively |
| A. | solid, liquid and liquid |
| B. | liquid, solid and liquid |
| C. | solid, liquid and gas |
| D. | gas, liquid and liquid. |
| Answer» D. gas, liquid and liquid. | |
| 591. |
What is the correct increasing order of molecular motion (kinetic energy) of particles in the following? |
| A. | Brick, water, air, curd |
| B. | Curd, water, air, brick |
| C. | Air, water, curd, brick |
| D. | Brick, curd, water, air |
| Answer» E. | |
| 592. |
Which one of the following is not a matter? |
| A. | Air |
| B. | Water |
| C. | Paper |
| D. | Smile |
| E. | None of these |
| Answer» E. None of these | |
| 593. |
Which of the following elements is liquid at room temperature? |
| A. | Argon |
| B. | Copper |
| C. | Mercury |
| D. | Calcium |
| E. | None of these |
| Answer» D. Calcium | |
| 594. |
A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be broken into smaller particles by hammering. It illustrates that |
| A. | Particles of matter have space in between them |
| B. | Particles of matter possess kinetic energy |
| C. | Particles of matter attract one another |
| D. | All of these. |
| Answer» D. All of these. | |
| 595. |
A student poured an equal amount of water into \[4\] containers as shown below. What result does this experiment show? |
| A. | Water has definite volume. |
| B. | Water has no definite shape. |
| C. | Water has definite mass. |
| D. | Water has no definite volume. |
| Answer» C. Water has definite mass. | |
| 596. |
How is Brownian motion caused? |
| A. | Through temperature fluctuations within the liquid phase |
| B. | Through attraction and repulsion between the charges on the colloidal particles |
| C. | Through collision of molecules between the colloidal particles |
| D. | Through pressure variations within the liquid phase |
| Answer» D. Through pressure variations within the liquid phase | |
| 597. |
The given chromatogram was obtained for proteins extracted from soya milk. The components present in protein extract are |
| A. | W and X |
| B. | X and Y |
| C. | W and Y |
| D. | Y and Z |
| Answer» D. Y and Z | |
| 598. |
In which of the following is Tyndall effect observed? |
| A. | Solution |
| B. | Precipitate |
| C. | Sol |
| D. | Vapour |
| Answer» D. Vapour | |
| 599. |
Geetika poured 20 g of salt into 200 mL of water in a beaker. She stirred the water to dissolve the salt completely. Then she heated the solution until it was reduced to half. How many grams of salt can be recovered from the remaining solution? |
| A. | \[\text{0 g}\] |
| B. | \[\text{10 g}\] |
| C. | \[\text{20 g}\] |
| D. | \[\text{40 g}\] |
| Answer» D. \[\text{40 g}\] | |
| 600. |
Which of the following forms a colloidal solution in water? |
| A. | Salt |
| B. | Glucose |
| C. | Starch |
| D. | Barium nitrate |
| Answer» D. Barium nitrate | |