GLOBE SCIENCE OLYMPIAD 2013

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3. Symbolic representation of four logic gates are shown as. Class – XI. Duration: 60 Minutes. Total Question: 50. Maximum Marks: 50. • All questions are ...
 

GLOBE SCIENCE OLYMPIAD 2013 Organized by Indian Environmental Society New Delhi, India Demo Test Class – XI

Duration: 60 Minutes

Total Question: 50

Maximum Marks: 50

Science & Environmental Science INSTRUCTIONS • • • •

All questions are compulsory, attempt all the questions. This question paper contains 50 questions (20+20+10). The question paper consists of three sections A, B and C. For each correct answer 1 mark will be awarded. There is no negative marking.

 

Section - A Science (c) both (a) and (b) physics questions (d) only (c)

1. A ball rests upon a flat piece of paper on a table top. The paper is pulled horizontally but quickly towards right as shown. Relative to its initial position with respect to the table, the ball _____. 2.

(a) remains stationary if there is no friction between the paper and the ball. (b) moves to the left and starts rolling backwards, i.e. to the left if there is a friction between the paper and the ball. (c) moves forward, i.e. in the direction in which the paper is pulled.

Identify the logic operation performed by the circuit given here. (a) (b) (c) (d)

NOT NAND OR NOR

3. Symbolic representation of four logic gates are shown as

Here, the correct statement/s is/are _____ . (a) only (a) (b) only (b)

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Pick out which ones are for AND, P A NAND annd NOT gates,, r respectively: (a) (ii), (ivv) and (iii) (b) (ii), (iiii) and (iv) (c) (iii), (iii) and (i) (d) (iii), (iii) and (iv) 4 Two identiccal rods AC and 4. a CB made of two differrent metals havin ng thermal co onductivities in i the ratio 2 : 3 are kept in contact with h each other at the end C as sho own in the figurre. A is at 1000°C and B iss at 25°C. Theen the junction C is at (a) (b) (c) (d)

50°C 75°C 60°C 5s°C

8. Maximum M num mber of electroons in a sub sh hell with l = 3 and n = 4 is ( 10 (A) ( 12 (B) ( 14 (C) ( 16 (D) 9. Id dentify the wroong statementt in the followiing (a)) Atomic radiuus of the elem ments increases as one moves down the first group of thee periodic tablee (b)) Atomic radiuus of the elemeents decreases as one moves across from m left to rightt in the 2nd period p of the periodic tablle (c)) Amongst is electronic sppecies, smallerr the positive charge on thhe cation, smalller is the ionic radius (d)) Amongst isooelectronic sppecies, greater the negative charge on thhe anion, largerr is the ionic radius 10. A gas absorbs a photon of 3555 nm and em mits at two waveelengths. If on ne of the emisssions is at 680 nm, the otherr is at: (a) 518 5 nm (b) 1035 nm ( 325 nm (c) ( 743 nm (d)

5 A body is moving 5. m along a circular path h with variablee speed. It hass (a) a radial acceeleration (b) a tangentiall acceleration (c) zero accelerration (d) both tangenntial and radial accelerations

11. The T electronicc transitions from n = 2 to t n = 1 will prod duce shortest wavelength in (where n = principal quan ntum state) ( Li+2 (a) ( He+ (b) ( H (c) ( H+ (d)

6 A body of mass 6. m 500 gram m is rotating in n a vertical cirrcle of radius 1 m. What is the differen nce in its kin netic energies at the t top and thee bottom of th he circle? (a) 4.9 J (b) 19.8 J (c) 2.8 J (d) 9.8 J

12. Mg2+ M is isoelecctronic with ( Ca2+ (a) ( Na+ (b) ( Zn2+ (c) ( Cu2+ (d)

7 A bucket coontaining water is tied to one 7. o end of a rope r of length 2.55 m and rota ated about the other end in i a vertical circlle. What shou uld be the min nimum velocityy of the bucket at a the highest point, so thatt the water in the bucket will not n spill? (g = 10 m/s2) (a) 2.5 m/ss (b) 4 m/s (c) 5 m/s (d) 7 m/s

13. Consider C the ground state of Cr atom (Z ( = 24). The num mbers of elecctrons with the azimuth hal quantum num mbers, l = 1 and d 2 are, respecctively: ( 12 and 4 (a) ( 12 and 5 (b) ( 16 and 4 (c) ( 16 and 5 (d) 14. The T pair of speecies with the same bond orrder is ( NO, CO (a) ( N2, O2 (b)

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  (c) O22-, B2 (d) O2+, NO+ 15. (a) (b) (c) (d)

16. (a) (b) (c) (d)

18. Which statement is wrong for viruses? (a) All are parasites. (b) Antibiotics have no effect on them. (c) They have ability to synthesize nucleic acids and proteins. (d) All of them have helical symmetry.

The term species was coined by______. Aristotle Linnaeus John Ray Engler

19. Classification of organisms based on evolutionary as well as genetic relationships is called (a) Numerical taxonomy (b) Phenetics (c) Biosystematics (d) Cladistics 20. In angiosperm, characters of flowers are used in classification because (a) Flowers are attractive (b) Flowers are large (c) Characters of flowers are conservative (d) None of the above

Nuclear membrane is absent in Penicillium Nostoc Volvox Agaricus

17. Single-celled eukaryotes are included in (a) Fungi (b) Protista (c) Monera (d) Archaea

Section - B Environmental Science 1.

2.

3. a) b) c)

What is the harm from the depletion of Earth's ozone layer? (a) The average temperature of earth's surface will increase gradually (b) The oxygen content of the atmosphere will decrease (c) Increased amount of Ultra violet radiation will reach earth's surface (d) Sea levels will rise as the polar ice caps will gradually melt Which of the following is not considered as part of water use planning? (a) Waste water treatment (b) Water diversion projects (c) Storm sewer drainage (d) Stalinization (e) Water use planning considers all of the above issues The three primary soil macronutrients are Carbon, Oxygen, and Water. Copper, Cadmium, and Carbon. Potassium, Phosphorus, and Nitrogen.

d) Boron, Zinc, and Manganese. e) None of the above.

4.

What are the three R’s which are used to help in Preservation of environment? (a) Reduce, Refuse, Recycle (b) Reduce, Reuse, Recycle (c) Retain, Reuse, Recycle (d) None of these

5.

Which of the following wastes cannot decomposed by bacteria to form compost? (a) Kitchen wastes (b) Plastic and polythene bags (c) Dead plants (d) Bodies of insects living in the soil

6.

Which gas exists in the highest concentration in the Earth's atmosphere? (a) hydrocarbons (b) ozone (c) oxygen (d) nitrogen (e) carbon dioxide

be

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  (a) (b) (c) (d)

7. which is the largest bone in the body a. femur b. Humers c. Spinal cord d. Colf bone 8.

The most common carrier of communicable diseases is (a) ant (b) housefly (c) dragonfly (d) spider

9.

Light year is related to (a) Energy (b) Speed (c) Distance (d) Intensity

Methane Nitrous Oxide Sulphur Oxide Carbon Monoxide

14. Which one of the following is a wrong statement? (a) Greenhouse effect is a natural phenomenon (b) Eutrophication is a natural phenomenon in freshwater bodies (c) Most of the forests have been lost in tropical areas (d) Ozone in upper part of atmosphere is harmful to animals

15. Carbon dioxide is called green-house gas because it is (a) Transparent to sunlight but traps heat (b) Transparent to heat but traps sunlight (c) Used in green-house to increase plant growth (d) Transparent to both sunlight and heat

10. How many Ergs are there in one Joule? (a) 102 (b) 104 (c) 106 (d) 107

16. The two gases making highest relative contribution to the greenhouse gases are (a) CO2 and N2O (b) CO2 and CH4 (c) CH4 and N2O (d) CFC5 and N2O

11. Anatomy is the Branch of Science which Deals with (a) Structure of animals and plants (b) Functioning of body Organ (c) Animal behavior (d) Cells & Tissues

17. Ozone depletion in the stratosphere will cause (a) Increased incidence of skin cancer (b) Forest tires (c) Global warming (d) none of these

12. Who proposed the Chemical Evolution of life (a) Darwin (b) Lammarck (c) Oparin (d) Haechel

13. Identify the non green-house gas (GHG) from the following 19. Lichens indicate pollution by (a) Ozone (b) SO2 (c) NO3 (d) CO

18. Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming? (a) CO2 40%,CFCs 30% (b) CFCs 14%, Methane 20% (c) Methane 20%, N2O 18% (d) N2O 6%, CO2 86% 20. Major aerosol pollutant present in the jet plane emission is (e) Carbon monoxide (f) Carbon tetrachloride (g) Chlorofluorocarbon (h) Sulphur dioxide

Section – C Science U -112, 3rd Floor, Vidhata House, Vikas Marg, Shakarpur, New Delhi -110092 Phone: 011-22450749, 22468582, Email: [email protected] web : www.globeindia.org/olympiad,www.iesgloal.org

 

1.

(d) Davis Cup, Wimbledon, French Open, Austra lian Open

The 9th South Asian Federation Games were held r ecently in which of the following cities? (a) Islamabad (b) Hyderabad (c) Kathmandu (d) Colombo

2.

Which of the following parts of the poppy plant is u sed for the extraction of opium? (a) Capsules (b) Flowers (c) Leaves (d) Roots

3.

A black hole is a body in space which does not allo w any radiation to come out. This property is due to its (a) Very small size (b) Very large size (c) Very high density (d) Very low density

4.

At which stage in its life cycle does the silk work yield the fiber of commerce? (a) Egg (b) Larva (c) Pupa (d) Imago

5.

In order to win the Grand Slam in Tennis, a player must win which one of the following groups of tournaments? (a) Australian Open, Wimbledon, French Open, U.S. Open (b) Wimbledon, French Open, U.S. Open, Swedi sh Open (c) Wimbledon, French Open, Paegas Czec Open , U.S. Open

6.

The speaker of the Lok Sabha can resign his office by addressing his resignation to a. the President b. the Prime Minister c. the Deputy speaker of the Lok Sabha d. the Chief Justice of India.

7.

The highest body that approves Five Year Plans in India is a. Planning commission b. National development council c. Interstate council d. Union cabinet

8.

Chambal river is a part of a. Sabarmati basin b. Ganga basin c. Narmada basin d. Gogavari basin

9.

Which of the following crops would be preferred for sowing in order to enrich the soil with nitrogen? a. Wheat b. Mustard c. Sunflower d. Gram

10. Which of the following plants is referred to as a living fossil? a. Ephedra b. Cycas c. Gingko d. Adiantum

  Answer Key Section - A 1

c

2

c

3

a

4

d

5

d

6

d

7

c

8

c

9

c

10

d

11

a

12

b

13

b

14

c

15

c

16

d

17

c

18

d

19

d

20

c

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  Section - B 1

c

2

c

3

e

4

b

5

b

6

d

7

a

8

11

b

12

a

13

d

14

d

15

a

16

b

17

a

18

b

3

c

4

c

5

a

6

c

7

b

8

9

b

10

c

b

19

d

20

c

b

9

a

10

d

Section - C 1

a

2

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