InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
Air friction can be reduced by "_______" the shape of the objects. |
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| 602. |
Name the components labelled as A,B,C,D,E. |
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| 603. |
Ruler, Measuring tape, Metre rod are ? |
| Answer» SOLUTION :INSTRUMENTS USED to MEASURE LENGTH | |
| 604. |
How can you differentiate between distance and displacement? |
| Answer» SOLUTION :DISPLACEMENT has DIRECTION but DISTANCE has no direction. | |
| 605. |
The device used to measure temperature is |
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Answer» METRE scale |
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| 606. |
If the mechanical advantage of a lever is 2.5, what will be the effort you need to apply to lift a load of 50 N? |
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Answer» Load=50N MA=EFFORT/load `:.` Effort = Load/MA Effort `= 50//2.5=20N` |
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| 607. |
How are animals and plants able to survive in water? |
| Answer» Solution :Oxygen and carbon dioxide are SOLUBLE in water. Animals and plants can utilize these DISSOLVED gases for respiration and PHOTOSYNTHESIS, and hence can survive in water. | |
| 609. |
Occurrence of eclipse and formation of shadows are due to ______. |
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| 610. |
Glancing angle and angle of incidence are ______ angle. |
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| 611. |
What are the factors in which the image obtained by the pinhole camera depend ? |
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Answer» SOLUTION :(i) The width of the pinhole camera. (II) The object DISTANCE |
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| 612. |
Name the metalloids. |
| Answer» SOLUTION :BORON, SILICON, ARSENIC and antiomoney are METALLOIDS. | |
| 613. |
Ashoke and Ravi stood before a plane mirror at a distance of 3 m from it. Ashok walked 5 steps towards the mirror, each step measuring 30 cm. Ravi walked 8 steps away from the mirror, each step measuring 25 cm. The distance between Ravi and the image of Ashoke in the mirror is ______ m. |
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Answer» 5.5 m After Ashok moved 5 steps towards the mirror, then his distance from the mirror =3m -5(30) cm =3 m=-1.5 m `=1.5 m`. After Ravi moved away from the mirro, his distance from the mirror =3m + 8(25) cm =3m + 2m =5 m Therefore , the distance between Ravi and the image of Ashok =1.5 m + 5 m =6.5 m. Hence, the correct option is (d) |
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| 614. |
(a)Identify the mistakes (s) in the diagrams and give justification.Whatinference can be drawn from above diagrams ? |
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Answer» SOLUTION :(a) The level of water in TESTTUBE B should be higher . Water shouldoccupy 1 /5 th of the total volume of test tube B. (b) since 1/5 th of the total volume of air is consumed due to theburning of PHOSPHOROUS, this space GETS occupied by water. |
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| 615. |
Rohit stepped on a banana peel while walking, so he slipped off |
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Answer» Due to the less AMOUNT of sliding friction under his foot. |
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| 617. |
Identify the characteristics features of diatoms |
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Answer» There pairs of legs and two pairs of wings. Hence the CORRECT option is (a). |
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| 618. |
GLOBAL WARMING |
| Answer» Solution :ENORMOUS increase in the suface temperature of earth DUE to increase in the levels of carbon dioxide and other gases , such as methane , ozone in atmosphere is called global warming . R eduction in the use if fossil fuels and controlling deforestation are some measures to prevent global warming . growing more and more plants is OBVIOUSLY the most ESSENTIAL requirement for controlling global warming. | |
| 619. |
It is not advisable to cook foodon a wood fire in a closed room . Give reasons. |
| Answer» Solution :In a CLOSED room , woodundergoes INCOMPLETE combustion to form carbon monoxide . Inhalationof COreduces the oxygen carrying CAPACITY of heamoglobin in the BLOOD . Hence , excess inhalation of CO can be fatal. | |
| 620. |
Identify the mixture in which the constituents cannot be separated by sublimation. |
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Answer» Naphthalene+sand HENCE, the CORRECT option is (d). |
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| 621. |
Static friction between two surfaces |
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| 622. |
Define rest. |
| Answer» SOLUTION :If a body does not CHANGE its position with RESPECT to its surroundings with time, then the body is SAID to be in a STATE of rest. | |
| 624. |
How can one find out whether a bulb is fused or not ? |
| Answer» Solution :If the filament of the bulb is BROKEN, then the bulb doesn't GLOW and is said to be FUSED. | |
| 625. |
What is bio-mass . |
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| 627. |
Distilled water cannot be used for which among the following purposes? |
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Answer» DRINKING HENCE, the correct OPTION is (d). |
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| 628. |
How can use third order levers as machines even though their MA is less than one? |
| Answer» Solution : For a third-order LEVER, for an applied effort the DISPLACEMENT at the LOAD is greated than that of effort. So, it is USED as a machine. | |
| 629. |
What is the speed of a body if it covers a distance of 20 m in 4 seconds? |
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| 630. |
What is inside the glass case of an incandescent bulb along with He-Ne gas ? |
| Answer» Solution :We FIND a thin wire which is fixed inside the BULB and it is CALLED FILAMENT of the incandescent (or) filament bulb. | |
| 631. |
Match Column I with Column II. |
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Answer» `(A)to(E), (B)to(d),(C)to(a),(D)to(c),(E)to(b)` |
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| 632. |
Have you ever seen an electric cell ? If so, how many terminals does it have and how can one differentiate the terminals of a battery ? |
| Answer» Solution :Yes, A CELL has TWO terminals. They are positive and negative terminals . The end which has the BRASS cap is a positive terminals and the BASE is the negative TERMINAL. | |
| 633. |
What Is Combustion? |
| Answer» SOLUTION :The PROCESS of BURNING of a substance in the PRESENCE of AIR (or) oxygen iscalled combustion. | |
| 634. |
Explain the types of eclipse. |
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Answer» Solution :TYPES of Eclipse: There are two types of eclipse. They are (a) SOLAR eclipse(b) Lunar eclipse (a) Solar eclipse : When the shadow of moon falls on the earth, we cannot SEE the sun.is called solar eclipse . Solar eclipse OCCURS only on new moon days. Solar eclipse does not occur on EVERY new moon day. Lunar eclipse always occurs on a full moon light but does not occur on every full moon day. |
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| 635. |
Keshav observed that the increase in the temperature of a body is given by T_(1) = 2t^(2) for the first 5 minutes and T_(2) = 3t for the next 5 minutes, where T_(1), T_(2) and 't' are temperatures in Fahrenheit, Celsius scales and time in minutes, respectively. If the initial temperature of the body is 20^(@)F and the relation between the Celsius and Fahrenheit scale is, then find the temperature of the body after 8 minutes in Celsius scale. |
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Answer» `T_(1) = 2t^(2)` `2xx25` `= 50^(@)F` Initial TEMPERATURE = `20^(@)F` After 5 min = `20^(@) + 50^(@) = 70^(@)F` `(C)/(5) = (F-32)/(9)` `C = (70-32)/(9) xx 5` `=21^(@)C` Increase in temperature after next 3 minutes `T_(2) = 3t` `= 3 xx 3` `T_(2) = 9` implies Increase in temperature is `9^(@)C` Temperature after 8 minutes = 21 + 9 `=30^(@)C` |
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| 636. |
{:("Across",|,"Down"),(4. "The cell which cannot be charge",|,1."Electricity produced by water stored at certain height"),(7."The substance which allows electrical energy passes through it ",|,2."Filament works on this effect of electricity"),(8."The property of conductor which opposes current ",|,3."Positive terminal of a cell"),(9."The path of electric energy flow is called",|,5. "Negative teminal of a battery"),(,|,6."MCBs are alternative for"):} |
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| 637. |
Name the bones that form pectoral, girdle in human beings. |
| Answer» Solution :The bones that support the chest region and HELP in the articulation of forelimbs form pectoral GIRDLE (shoulder girdle). It consists of a PAIR of collar bones. A large flat shoulder blade connected by humerus of upper arm forms the ball and SOCKET joint. | |
| 638. |
Angle of deviationmeans _____ . |
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| 639. |
If mechanical advantages of two inclined planes A and B are in the ratio of 1 :3, the slope of A must be_____ than that of B. |
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| 640. |
Thought air contains only about 0.03% of carbon dioxide , it is a very important component of air. Givereasons. |
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Answer» Solution :(i) Carbon DIOXIDE is essential photosynthesis . In the presence of sunight green PLANTS use carbon dioxide from air and water vapour from soil to make food by the process of photosynthesis. (ii)carbon dioxide EXTINGUISHES FIRE. (III) Carbon dioxide is a gree house gas. |
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| 641. |
During an incident of fire , one is advised to wrap a woolen blanket over a burning object.Explain why? |
| Answer» Solution :During an incident of fire , one is advised to warp a WOOLEN BLANKET over a burning object because air gaps in woolen blanket act as an INSULATING MEDIUM which cuts the supply of oxygen to object that is burning THEREBY prevent it from further burning. | |
| 642. |
The components of ink are separated by _______ |
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| 643. |
The backone in the earthworm helps in movement. |
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| 644. |
Distinguishbetween conventional and non-conventional sources of energy . |
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| 645. |
Why are the magnets used in earphones or speakers? |
| Answer» Solution :Sound is PRODUCED due to virbration of objects. To produce vibration , you need something that itself vibrates and MAKE air to vibrate. This can be achieved when a CURRENT carrying coil is placed near a magnet as arranged in earphones and speakers. | |
| 646. |
Which of the following types of mixtures is always homogeneous? |
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Answer» Liquid-Liquid HENCE, the CORRECT option is (B). |
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| 647. |
______ can be heterogeneous or homogenous. |
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| 648. |
If there any difference between mass and weight ? If So, what is the difference ? |
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Answer» (2) Mass is measured in kilograms and weight in newtons in SI system |
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| 649. |
Explain why, a single-fixed pullery is used to lift a load even if its MA is equal to 1? |
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| 650. |
Select the correct alternative from the given options.Identify the true statement among the following options. |
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Answer» AIR OCCUPIES space |
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