HINTS FOR DIFFICULT QUESTIONS
Distance covered by Abha = circumference = 2г 22 =2xx70 12 Displacement = 0 = 440 m So difference = 440-0 = 440 m
Option 2 is correct option.
(4) Energy use 0.8 kilowatt x 0.5 hrs x 30 days = 12 kilowatt-hrs (kwhr) electricity bill = 12 x 8 = 96 Rs. .. Option 2 is correct option (7) 40 gm = 1 mole of NaoH. So 1 mole of HCI is also required ... 36.5 gm of HCI is required ..
Option 2 is correct option
(8) molecular mass of salt = 23 + 35.5 = 58.5 u .. 58.5 gm of salt there contain 23 gram of so- dium. . In 117 gram of salt will contain23x 117 58.5 46 =46 gram of sodium Option 4 is correct option. (9) Only CH COOH is weak acid. Others are strong acids.
Option 3 is correct option.
(11) Funaria is Broyophyta. Others are Thallephyta Option 3 is correct option. 111 1 1 111 = (19)-+---+ vuf 1 v-5 10 v 5 10 1 v 10 1 v = 10 cm. As object is in between focus and pole so image will be virtual and will form behind the mirror.
Option 1 is correct option
(21)In the given gas speed of sound at same tem- perature does not depend on pressure or den- sity of that gas.
. Option 3 is correct option
(22)Echo should be heard after minimum 0.1 second. That means it should travel 36 m. at speed of 360 m/s. That means distance of re flecting surface is 36 + 2 = 18 m. .:.
Option 4 is correct option
(29) Spinal cord is not a part of Neuron all other are pars of Neuron. .
Option 3 is correct option.
IDEAL QUESTION PAPER: 4
(1) Velocity time graph for uniform acceleration is....
(1) Parallel to x axis
(2) Parallel to y axis
(3) A straight line passing through origin
(4) Curved shape
Ans-(3) A straight line passing through origin
(2) What do you think - which of the following graph will show relation between distance and time? (1) distnace
(2) distnace time
(3)distnace time
Ans-(4)distnace time
time
(3) Units of work and Energy are ... and..... ( respecitvely.
(1) Joule, Joule
(2) Joule, Watt
(3) Watt, erg
(4) Watt, horsepower
Ans-(1) Joule, Joule
(4) Nitin applied a force by his two hands each of having force of 5N on the wall of his house. How much work was done by Nitin ?(Note: Wall is neither moved nor fell)
(1) 5 joule
(3) 0 joule
(2) 10 joule
(4) 25 joule
Ans-(3) 0 joule
(5) Three electric cells of 6 volt are connected in a circuit. If two resistors of 3 ohm each will flow through electic circuits ? are connected in series how much current
(1) 3 ampere
(2)2 ampere
(3) 108 ampere
(4) 54 ampere
Ans-(1) 3 ampere
(6) If two resistors of 5 ohm each are connected in parallel instead of series, how much dif- ference will be in their effective resistance ?
(1) 9.6 ohm
(3) 15 Ohm
(2) 7.5 ohm
(4) 12.5 ohm
Ans-(2) 7.5 ohm
(7) Molecular formula of lime stone is.....
(1) CaCl,
(2) CaO
(3) CaCO,
(4) NaCl
Ans-(3) CaCO,
(8) How many moles will be in 9 grams of water?
(1) 3.011 x 102
(2) 3.011 x 10
(3) 6.022 x 10115
(4) 10
Ans-(1) 3.011 x 102
(9) Which of the following is basic radical ?
(1) chloride
(2) hydride
(3) hydroxide
(4) ammonium
Ans-(4) ammonium
(10) In the aqueous solution of acid concentra- tion of hydorgen is 10 mole/litre. What is its PH value ?
(1) 3
(2)-3.
(3) 10
(4)7
Ans-(1) 3
(11) Amphibians of the plant kingdom means plants in.... class
(1) Thallophyta
(2) Pteridophyta
(3) Angiosperms
(4) Bryophyta.
Ans-(4) Bryophyta.
(12) Which of the following is not a top con- sumer?
(1) Tiger
(2) Lion
(3) Snake
(4) Leopard
Ans-(3) Snake
(13) When energy exchange from one tropis level to another tropic level then ergy is exchanged.
(1) 1
(2) 10
(3) 50
(4) 100
Ans-(2) 10
(14) When milk changes into yoghurt proteins are separated due to
(1) Corrosion
(2) Decomosition
(3) Reflection
(4) Coagulation
Ans-(4) Coagulation
(15) Reproduction of yeast cause due to process. se. e:
(1) Sexual
(2) Budding
(3) Division
(4) Vegetative
Ans-(2) Budding
(16) Which of the following is not a factor of climate?
(1) Temperature
(2) Rain nt
(3) Tsunami
(4) Humidity
Ans-(3) Tsunami
(17) Find odd man out !
(1) Pyrolysis
(2) Dialysis
(3) Composting
(4) Recycle
Ans-(2) Dialysis
(18) Which of the following softwares is useh to store information in statistical form? f-
(1) Microsoft Word ?
(2) Microsoft Excel
(3) Microsoft Powerpoint
(4) Paint
Ans-(2) Microsoft Excel
(19) First generation computers were failed due to ....
(1) Heat
(3) Electricity
(2) Air
(4) Values
Ans-(1) Heat
(20) To obtain a complete image of a person in plane mirror the minimum height of mirror should be ... of that person.
(1) Same as his height
(2) Half S S - d
(3) Double 2
(4)rd
Ans-(2) Half
(21) Which of the following is not a magnifica tion of concave mirror?
(1) 2
(2)-2 1 1 2
(4)-2
Ans-1 1 2
(22) Which of the following statements is true in case of spherical mirror ?
(1) Real image can be obtained by conve mirror
(2) Real image can be obtained only by concave mirror
. (3) Image formed by convex mirror is larger than ( the object.
(4) Virtual image can be formed by concave mirror.
Ans-(4) Virtual image can be formed by concave mirror.
(23) Ultrasonic waves are transmitted down- wards into the sea with the help of a SO- NAR the reflected sound from submarine is received after 8 seconds. At what distance ( that submarine will be ? (Velocity of sound in water is 1550 m/s)
(1) 12.4 km
(2) 6.2 km
(3) 62 km
(4) 124 km
Ans-(2) 6.2 km
(24) A sound wave has frequency 3 KHz and wavelength 12.5 cm. How much time will require to cover a distance of 3 km?
(1) 4 seconds
(2) 6 seconds
(4) 10 seconds
(3) 8 seconds
Ans-(3) 8 seconds
(25) If we shout loudly standing at some distance from a hill, Echo is heard after 1.2 seconds. What will be distance of the hill ? (Speed of sound = 340 m/s)
(1) 204 m
(2) 408 m
(3) 283.33 m
(4) 141.67 m
Ans-(1) 204 m
(26) Which of the following statements is not true in case of diamond? 31 ue (20
(1) Hardest substance in all natural substances (4) in or
(2) Co, is formed after burning in air.
(3) does not dissolve in any solvent.
(4) It has hexagonal layered structure.
Ans-(4) It has hexagonal layered structure.
(27) Main element of biogas is.... (5) (6) a- 2 XE (1) Methane
(2) Butane
(3) Ethane
(4) Carbon dioxide
Ans-(1) Methane
(28)... % of aqueous solution of salt is called saturated brine.
(1) 10
(2) 20
(3) 25
(4) 30
Ans-(3) 25
(29) Which of the following is not type of radioactive radiation ?
(1) Alpha
(2) Beta
(3) Thita
(4) Gamma
Ans-(3) Thita
(30) Which of the following organs is not related to brain ?
(1) Nose
(2) Ear
(3) Throat
(4) Eye
Ans-(3) Throat
(31) .... is a part of brain which controls important involuntary movements.
(1) Medulla oblogata
(2) Cerebellum
(3) Cerebrum
(4) Spinal cord
Ans-(1) Medulla oblogata
(32) Functional unit of heredity is ......
(1) Rhibosomes
(3) Protin
(2) Gwanin
(4) Gene
Ans- (4) Gene
(33) Inner surface of repsiratotry tract has .... epithelial tissues.
(1) ciliated
(3) Galnadular
(2) Columnar
(4) Cuboidal
Ans-(1) ciliated
(34) Which of the following is GM variety of tomato?
(1) Amflora
(3) MON 810
(2) Golden
(4) Vaishali
Ans-(4) Vaishali
(35) The largest optical telescope in Asia is at (1) Chandigarh
(3) Ranchi
(2) Lucknow
(4) Nainital
Ans-(4) Nainital
HINTS FOR DIFFICULT QUESTIONS
(4) displacement = 0 work =
0 option 3 is correct option.
(5) Potential difference = 6 x 3 = 18 v effective resistance = 3 + 3 = 6 ohm V |= 18 = 3 ampere R 6 d ..
Option 1 is correct answer.
(6) In the series connection effective resistance = f 5+5=10 ohm In parallel conncection effective resistance = R,R2 5x5 25 F R1+R2 5+5 10 = 2.5 ohm ... Difference = 10-2.5 = 7.5 ohm .:.
Option ② is correct answer.
(8) 18 gram = 1 mole of water9 gram 0.5 mole of water Number of moles = 0.5x6.022 x 10 -3.011 x 102
Option 1 is correct option
(10) Concentration of hydrogen in mole/litre is nega- tive log (power of 10) = PH value Value of PH is 3
Option is correct option
(17) Dialysis is not a type of solid waste manage- ment. Others are types of solid waste mangement .
Option 2 is correct option.
(21) 2 magnification means virtural image and smaller than object. Such type of image can not be formed by concave mirror. ..
Option 3 is correct option.
(23) distance = speed x time distance = 1550 x 8 = 12400 m distance of submarine = distance covered by sound wave +2= 1240026200 6.2 km ..
Option 2 is correct option.
(24) velocity = wavelength x frequency 12.5 x 3000 Hz - 375 m/s 100 =0.375 Km/Second distance 3 velocity 0 375 time= time 8 seconds
Option (3) is correct option.
(25) distance covered by sound velocity x time - 340 x 1.2 = 408 m <= 408-2 distance of hill = 204 m
Option is correct option.
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