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April 2022

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33. Two cars P and Q start at the same time from A and B which are 120 km apart. If the two cars travel in opposite directions, they meet after one hour and if they travel in same direction (from A towards B), then P meets Q after 6 hours. What is the speed of car P?

दो कारें P और Q एक ही समय में A और B से शुरू होती हैं जो 120 किमी  की...

29. With a uniform speed a car covers the distance  in 8 hours. Had the speed been increased by 4 km/hr, the same distance could have been covered in hours. What is the distance covered?

एक समान गति के साथ एक कार 8 घंटे में दूरी को कवर करती है। अगर स्पीड 4 किमी /...

32. A thief is noticed by a policeman from a distance of 200m. The thief starts running and the policeman chases him. The thief and the policeman run at the rate of 10 km, and 11 km per hour respectively. What is the distance between them after 6 minutes?

एक चोर को 200 मीटर की दूरी से एक पुलिसकर्मी दिखाई देता है। चोर भागने लगता है और पुलिस वाला...

30. In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The durations of the flight is:

600 किमी की उड़ान में, एक विमान खराब मौसम के कारण धीमा हो गया था। यात्रा के लिए इसकी औसत...

31. It takes eight hours for a 600 km journey, if 120 km is done by train and the rest by car. It takes 20 minutes more, if 200 km is done by train and the rest by car. The ratio of the speed of the train to that of the cars is:

एक 600 किमी की यात्रा में आठ घंटे लगते हैं, अगर 120 किमी ट्रेन और बाकी कार से होता है।...

28. In covering a certain distance, the speed of A and B are in the ratio of 3:4. A takes 30 minutes more than B to reach the destination. The time taken by A to reach the destination.

एक निश्चित दूरी को कवर करने में, A और B की गति 3: 4 के अनुपात में है। A को...

27. In covering a distance of 30 km, Abhay takes 2 hours more than Sameer. If Abhay doubles his speed, then he would take 1 hour less than Sameer. Abhay’s speed is:

30 किमी की दूरी तय करने में, अभय समीर से 2 घंटे अधिक लेता है। अगर अभय ने अपनी गति...

26. A man covered a certain distance at some speed. Had he moved 3 Kmph faster, he would have taken 40 minutes less. If he had moved 2 Kmph, slower, he would have taken 40 minutes more. The distance (in km) is:

एक आदमी ने कुछ दूरी एक निश्चित चाल पर तय की। अगर वह 3 किलोमीटर प्रति घंटे की रफ्तार से...

25. A train when moves at an average speed of 40 Kmph, reaches its destination on time. When its average speed becomes 35 Kmph, then it reaches its destination 15 minutes late. Find the length of journey.

एक ट्रेन जब 40 किमी प्रति घंटे की औसत गति से चलती है, तो समय पर अपने गंतव्य तक पहुंचती...

23. A car traveling with 5/7 of its actual speed covers 42 km in 1 hr 40 min 48 sec. find the actual speed of the car

ਇਕ ਕਾਰ ਆਪਣੀ ਅਸਲ ਗਤੀ ਦਾ 5/7ਨਾਲ ਚਲਦੀ ਹੈ ਤੇ ਉਸ ਨੂੰ 42 ਕਿਲੋ ਮੀ. ਦੀ ਦੂਰੀ ਤੈਹਿ ਕਰਨ ਵਿਚ...

22. A man travels 600 km by train at 80 km/hr, 800 km by ship at 40 km/hr, 500 km by aeroplane at 400 km/hr and 100 km by a car at 50 km/hr. what is the average speed for the entire distance?

एक आदमी ट्रेन से 600 किमी, 80 किमी / घंटा से समुंद्री जहाज से 800 किमी, 40 किमी / घंटा...

21. A boy rides his bicycle 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. his average speed for the entire trip is approximately

. एक लड़का अपनी साइकिल को 12 किमी / घंटा की औसत गति से 10 किमी की सवारी करता है...

20. A boy goes his school from his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. if he takes 5 hours in going and coming the distance between his house and school is:

एक लड़का अपने घर से 3 किमी / घंटा की गति से अपने स्कूल जाता है और 2 किमी /...

19. A car driver travels from the plains to the hill station, which are 200 km apart at an average speed of 40 km/hr. in the return trip, he covers the same distance at an average speed of 20 km/hr. the average speed of the car over the entire distance of 400 km is.

एक कार चालक मैदानी इलाकों से हिल स्टेशन तक जाता है, जिसकी 200 किमी की दूरी के लिए औसत गति...

27. When a grape is placed in concentrated sugar solution, then it will show

(a)  Endosmosis                       (b)  Exosmosis (c)   Imbibition                         (d)  None of these Ans. (b)      Sugar solution is hypertonic hence shrinkage of grapes...

26. Pollen grains of some of the plants germinate on stigma soon but they burst in water or dilute sugar solution

(a)  Exosmosis                          (b)  Endosmosis (c)   Imbibition                         (d)  Plasmolysis Ans.  (b)      Because the concentration of cytoplasm of pollen grains is high...

25. Which of the following plant absorb water from atmosphere

(a)  Jamun                                (b)  Orchid (c)   Melia                                  (d)  Moringa Ans.  (b)          In orchids, aerial roots are found which have velamen tissue,...

12. A cell increases in volume if the external medium is

(a)  Hypotonic                          (b)  Hypertonic (c)   Isotonic                              (d)  None of these Ans. (a)      If the plasmolysed cell (flaccid cell) is placed in...

11. A cell placed in strong solution will shrink because

(a)  Cytoplasm will decompose (b)  Mineral salt will break the cell wall (c)   Salt water enter the cell (d)  Water...

45. Active absorption is affected by

(a)  Osmotic concentration (b)  Associate tissue structures (c)   Transpiration (d)  Sucking capacity of root hair Ans.  (a)      Active absorption takes...

16. A person has to cover a distance of 6 km, in 45 minutes. If he covers one-half of the distance in one -thirds of the total time: to cover the remaining distance in the remaining time, his speed (in km/hr) must be

एक व्यक्ति को 6 किमी की दूरी 45 मिनट में तय करनी होती है। यदि वह कुल समय के एक-तिहाई...

44. The unique property of water molecules is

  (a)  Universal solvancy (b)  Conductivity (c)   Specific heat (d)  Ability to maintain body temperature Ans.       (a)  When...

8. Dry seeds when placed in water swells due to

(a)  Imbibition                         (b)  Absorption (c)   Diffusion                            (d)  Adsorption Ans.   (a)  Meterials capable of imbibition such as proteins and cellulose in...

9. Which of the following shows the presence of semipermeable membrane

(a)  Vessels                               (b)  Tracheids (c)   Fibres                                 (d)  Wood parenchyma Ans. d (14)

10. If a cleaned goat bladder is filled with a syrup tightly tied and emersed in a vessel of water

(a)  Volume of liquid in the bladder will increase (b)  Volume of liquid will decrease (c)   Volume of liquid in...

13. In osmosis solvent flows from

(a)  Lower concentration to higher concentration of solvent (b)  Higher concentration of solvent to lower concentration of solvent (c)   One...

15. All the following involves osmosis except

(a)  Water from soil entering a root hair (b)  Water passing from root hair to adjacent cells (c)   Water passing...

14. If a cell is reduced in size on placing in a solution of sugar, the solution is

(a)  Hypertonic                        (b)  Hypotonic (c)   Isotonic                              (d)  Saturated Ans. (a)      A solution whose osmotic concentration is more than...

16. Freshly cut potato slice is put into strong solution of sugar, later its cells found to be

(a)  Flaccid                                (b)  Turgid (c)   Longer                               (d)  More full of starch Ans.  (a)           If potato tuber is placed in to...

17. An example of selectively permeable membrane can be best deduced from the passage of water and mineral salts from

(a)  Soil into root hair (b)  Root hair into cortical cell (c)   Pericycle cells into tracheal elements (d)  Cortical cells...

18. An example of selectively permeable membrane is

(a)  Plasmalemma                   (b)  Cell wall (c)   Mitochondrial membrane       (d) Chloroplast membrane Ans.  (a)      Plasmalemma allows selective passage of solutes along...

19. Plasma membrane controls

(a)  Passage of water (b)  Passage of water and some solutes in and out of the cell (c)   Passage of...

20. A cell is plasmolysed after being kept in a hypertonic solution. What will be present between cell wall and plasmalemma

(a)  Isotonic solution               (b)  Hypertonic solution (c)   Air                                      (d)  Hypotonic solution Ans.  (b)          During plasmolysis, plasma membrane shrink along with...

21. Swelling of gum in water is due to

  (a)  Imbibition                         (b)  Endosmosis (c)   Active diffusion                (d)  All the above Ans.    (a)  Dry gum or pieces of...

22. Which of the following statement is correct

(a)  Plant absorb excess quantity of water (b)  Plants take in small quantity of mineral salts through soil water (c)  ...

23. Gaseous exchange in land plants takes place through stomatal opening, while in submerged hydrophytes it takes place by

(a)  Lenticels (b)  Stomata (c)   Hydathodes (d)  General surface of the cells by diffusion Ans.  d (11)

24. Which of the following has more imbibition power

(a)  Cellulose                            (b)  Hemicellulose (c)   Fat                                      (d)  Protein Ans.     (d)  Proteins are the strongest imbibants of water, starch less...

7. The process of osmosis involves

(a)  Movement of solute through semipermeable membrane (b)  Movement of solvent through a semipermeable membrane (c)   Movement of solution through...

6. Selective permeability identifies the process of transmission through semipermeable membrane is called

(a)  Diffusion                            (b)  Osmosis (c)   Plasmolysis                        (d)  Imbibition Ans. (b)      Osmosis is a special type of diffusion or diffusion through semipermeable...

5. What happens when formalin preserved Spirogyra filament is placed in a hypertonic sugar solution

(a)  It gains turgidity               (b)  It looses turgidity (c)   It becomes plasmolysed   (d)  Nothing happens Ans. (d)      In formalin preserved...
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