Know Your World - 45

1. From which part of the plant is turmeric obtained?

Stem

2. In order of their distances from the Sun, which planet lies between Mars and Uranus?

Jupiter and Saturn

3. Which is used as a coolant in nuclear reactors?

Liquid sodium

4. Meghnad Saha is known for his contribution in which field?

Physics

5. Which part of cinchona plant yields quinine?

Bark

6. Liquefied Petroleum Gas consists of mainly which gases?

Methane, butane and propane

7. Which cytoplasm organelles are treated as prokaryotic cells within the eukaryotic cells?

Glyoxysomes

8. When milk is churned, how does the cream separate from it?

Due to the centrifugal force

9. When did man first land on moon?

1969

10. Which is the secondary source of light in a fluorescent lamp?

Mercury vapour

11. Archaeopteryx had which reptilian characters?

Clawed wings, teeth on jaw, tail

12. Which elements are obtained from sea weeds?

Iodine

13. By using which technique, is DNA fingerprint done?

Southern Blotting

14. Which Bacteria convert atmospheric nitrogen into nitrogenous compound?

Nitrogen fixing bacteria

15. Sound travels faster in which thing?

Iron than in air

16. Which type of microorganism is most widely used in industries?

Bacteria, microalgae and fungi.

17. In fireworks, how is the green flame produced?

Because of barium

18. Water will be absorbed by root hairs, then how is when the external medium?

Hypotonic

19. Who does a liquid drop tend to assume a spherical shape?

Surface tension

20. What is an instrument for measuring the rate of transpiration?

Potometer

21. Which reflects back more sunlight as compared to other three?

Land covered with fresh snow

22. Which substance does not have a melting point?

Glass

23. For which snake is the diet mainly composed of their snakes?

King Cobra

24. What minimum number of non-zero non-collinear vectors is required to produce a zero vector?

3

25. What structure is common to both earthworm and cockroach?

Ventral nerve cord

26. By which a mixture of sand and naphthalene can be separated?

Sublimation

27. Which part of human brain is the regulating centre for swallowing and vomiting?

Medulla oblongata

28. By which Radio waves of constant amplitude can be generated?

Oscillator

29. Which is used to know the development of foetus in uterus?

Ultrasound

30. Which oil is used in the floatation method for the purification of ores?

Pine oil

Know Your World - 44

1. Which mirror is to be used to obtain a parallel beam of light from a small lamp?

Concave mirror

2. What is the Number of water molecules present in Mohr’s salt?

8

3. Which gland is responsible for the secretion of insulin?

Pancrease

4. The change in temperature of a body is 50°C. What is the change on Kelvin scale?

50 K

5. What is a good source of Vitamin ‘E’?

Fresh vegetable

6. Which are the important raw materials required in cement industry?

Limestone and clay

7. What is not the cause of low conductivity of electrolyte?

Ionization of salt

8. Epiphytes are plant which depends on other plants for which purpose?

Mechanical support

9. Cooking gas is a mixture of which gases?

Butane and propane

10. Which acid is produced when milk gets sour?

Lactic acid

11. What is Electric field intensity at a point a hollow charged spherical conductor?

Is zero

12. What is the most important requirement for the people of a flood hit area?

Inoculation against cholera

13. Which are the most commonly used chemicals in the artificial rain making or cloud seeding?

Silver Iodide (Agl)

14. Which hormone is responsible for the secretion of milk in mothers?

Lactogenic hormone

15. What happens, When water is heated from 0°C to 10°C the volume of water?

First decreases then increases

16. A vein is a vessel that carries blood which side?

Towards the heart

17. Which compound does not give a positive test in Lassaigne’s test for nitrogen?

Hydrazinc

18. What is in lichen symbiotic relationship between fungi and algae called?

Halotism

19. With which instrument can a sailor in a submarine see the objects on the surface of sea?

Periscope

20. Litmus paper used in laboratory from which obtained?

Lichen

21. Which acid is used in synthetic lemonade?

Citric acid

22. At absolute zero temperature, what will be the kinetic energy of the molecules?

Zero

23. Which is the instrument that measures air pressure?

Barometer

24. Middle ear is not found in snake. Through part do they receive sound?

Skin

25. By whom was the quantum theory first enunciated?

By Max Planck

26. Through which are the characters are transferred from parents to progeny?

DNA

27. With rise of boiling point of water, what will be the latent heat of steam?

Decreases

28. Which branch of biology deal with the study of heredity?

Genetics

29. If a proton of mass m is moving with velocity of light, how will its mass?

Unchanged

30. If we sprinkle common salt on an earthworm, why does it die?

Due to osmotic shock

Know Your World - 43

1. A man with a dark skin, in comparison with a man with a white skin, What will experience?

Less heat and less cold

2. Where a large number of species are are found within a small unit of area?

Wet evergreen equatorial forests

3. Which is the tree requiring minimum water for its growth?

Babul

4. How are Oxygen and ozone?

Allotropes

5. In which is ‘Foot and Mouth Disease’found?

Cattle

6. What denotes the smallest temperature?

1° on the Kelvin scale

7. Which tree, once very popular in social forestry, is now taken to be environmental hazard?

Eucalyptus

8. Foot-and-Mouth disease in animals, a current epidemic in some parts of the world, By which is this caused?

Bacterium

9. In which animal is respiration done by skin?

Frog

10. ‘Gobar gas’ contains mainly which gas?

Methane

11. By which number the quality of gasoline’ sample is determined?

By its octane number

12. Due to bite of mad dog the disease hydrophobia is caused by which virus?

Rabies virus

13. A temperature at which both the Fahrenheit and the centigrade scales have the same value?

-40°

14. Medicine for epilepsy is obtained from which lichen?

Parmelia

15. Which type of glass is used for making glass reinforced plastic?

Quartz glass

16. What percentage of water is lost during transpiration?

0.99

17. When temperature is gradually decreased, what is the specific heat of substance?

Decreased

18. What is the loss of water in the form of water drops called?

Guttation

19. Which metal is non toxic in nature?

Gold

20. What is Study of growth and development of embryo?

Embryology

21. Angular separation between two colours of the spectrum depends upon which thing?

Angle of deviation

22. What is the Study of pulse and arterial blood pressure called?

Sphygmology

23. Which is the element that has the highest first ionization potential?

Nitrogen

24. What is considered as the easily digestible source of protein?

Soybean

25. Total internal reflection of light is possible when light enters from which thing?

Water to air

26. Which is a global biodiversity hotspot in India?

Western Ghats

27. In the human body, Cowper’s glands form a part of which system?

Reproductive system

28. Which transition metal is in liquid state?

Mercury

29. In absence of ribosome in cell which functions does not take place?

Protein synthesis

30. If a bar magnet is cut length wise into 3 parts, what will the total number of poles be?

6

Know Your World - 42

1. ‘Sharbati Sonora’ refers to ______

A variety of wheat

2. Kisan-Khad is an example of fertilizer ______

N-P-K

3. Commercial Cork is obtained from the bark of ______

Oak

4. The National Bureau of Plant Genetic Resource is located at ______

New Delhi

5. Origin of species was published by ______

Charles Darwin

6. The deficiency of ______ in the body leads to diabetis.

Insulin

7. Antibiotics are ______

drugs prepared from moulds and mould like organisms

8. An instrument to hear and analyse movements of heart and lungs ______

Stethescope

9. Largest reptile is ______

Crocodile

10. Life span of RBC is ______

120 days

11. An adult person will have ______ liters of blood

43256

12. In GM food, GM stands for ______

Genetically modified

13. Vaccine for influenza has been discovered by_____

Salk

14. The number of chromosomes in a normal human body cell is_____

46

15. Who is known as the father of Genetics?

Gregor Johann Mendel

16. The average length of human pregnancy is_____

36-38 weeks

17. Colour vision is made possible by the cells in the retina called_____

cone cells

18. The naturally occurring anticoagulant in the human body is_____

Heparin

19. The cellular energy is made available in the form of_____

ATP

20. Osteomalacia symptomised by bone softening is due to the deficiency of_____

Vitamin D

21. 1 gm of carbohydrate food gives energy which is about _____

4.2 k.cal

22. Who is the father of cloning?

Ian Wilmut

23. Who invented oral polio vaccine?

Albert Sabin

24. Name the disease which created panic in Asian countries in 2003.

Avian Flu

25. Name the first transgenic crop sown in India.

Bt. Cotton

26. Write the scientific name of coconut.

Cocus nucifera

27. Name the largest flower in the world?

Rufflesia

28. National Institute of Communicable diseases is located at ___

New Delhi

29. Name the inventor of mercury thermometer.

Fahrenheit

30. Name the scientist who prepared smallpox vaccine first.

Edward Jenner

Know Your World - 41

1. The shortest bone in the human body is ___

Stapes

2. What is Tissue Culture?

A branch of biology in which living tissues or cells are grown artificially in suitably controlled environments. The cells or tissues may be grown on solid substrates such as glass

3. What is Cloning?

Cloning is the production of copies that are genetically identical to the parent. It occurs naturally in asexually reproducing lower organism and vegitatively reproducing plants.

4. How are identical twins born?

One sperm fertilizes with the ovum and then the zygote divides into two separate cells developing independently. They grow into the identical twins.

5. How is acid rain caused?

Acid rain is caused by large scale emission of acidic gases into the atmosphere from thermal power plants, industries and automobiles. The gases mainly responsible for acid

6. What do you mean by test tube baby?

If a woman is unable to conceive and bear children an ovum is taken from the woman and fertilized by the sperm of the male inside a test tube containing nutrient medium.

7. Why blood group ‘‘O’’ is called a universal donor?

Blood group ‘O’ do not contains both the antigen (A & B). So there is no possibilities to agglutinate and it is safe to transfuse into persons of any blood group.

8. Why do we perspire on a hot day?

Human body is physiologically conditioned to maintain uniform temperature. When the heat produced in the body becomes excessive and not dissipated properly, the sweat

9. Describe briefly the functions of liver.

Liver is the largest gland in human body. The main functions of liver are - 1.It secretes bile which helps in digestion. 2.It synthesis amino acids, plasma proteins, cholesterol etc.

10. What is inoculation?

Introduction of germs of the some disease below the skin, so as to produce the disease in a mild form and thus give immunity from a severe attack of the same disease is called inoculation. inoculation is done to control diseases like plague, cholera etc.

11. Mitochondria are called “Power house” of the cell. Why?

The energy released during the biological oxidation of carbohydrates and fats is utilized by the mitochondria and synthesize the energy rich compound known as ATP

12. What is “field capacity of water’’?

The amount of water retained by the soil after the drainage of gravitational water is called field capacity or the water-holding capacity of the soil.

13. What is Biological Oxygen Demand (BOD)?

Degree of impurity of water due to organic matter is measured in terms of B.O.D. BOD is the oxygen in milligrams required for five days in one litre of water at 20°C for the microorganisms to metabolize organic waste. BOD is high in highly polluted water.

14. Why are earthworms regarded as a great friend of the farmers?

Earthworms increase the fertility of the soil by taking dead decaying leaves in their burrows which ultimately form the humus content of the soil. Thus they are regarded as a great friend of farmers.

15. What is soil profile?

Soil profile is a term used to show different layers or horizons of soil for their study in undisturbed state. The horizons may differ in thickness, colour, texture, structure, porosity, activity and composition.

16. Alpha-keratin is a protein present in which thing?

Wool

17. Which of the following is used as ‘a moderator in nuclear reactor?

Graphite

18. Which planet looks reddish in the night sky?

Mars

19. The improper function of which results in condition ‘Myxedema’ in human beings?

Thyroid gland

20. Which element that does not occur in nature but can be produced artificially?

Plutonium

21. Which can be used for biological control of mosquitoes?

Gambusia

22. Which planet looks reddish in the night sky?

Mars

23. The improper function of which results in condition ‘Myxedema’ in human beings?

Thyroid gland

24. The latitude of a place is the same as which place?

Celestial pole

25. In which technology do Cryogenic engines find applications?

Rocket technology

26. Which vitamin is considered to be a hormone?

Vitamin D

27. Which is the element found on the surface of the moon?

Titanium

28. Why is ‘Beaufort Scale’ used?

To measure wind velocity

29. Through which Translocation of food materials in plants takes place?

Phloem

30. When does Relative humidity decreases?

With increased temperature

Know Your World - 40

1. Which of the following processes is responsible for producing the sand dunes in western Rajasthan?

Wind deposition

2. The solar radiation coming to Earth is called ___

Sunshine

3. Marble is the metamorphosed form of ___

Limestone

4. Which one of the following planets has no moon?

Mercury

5. Which group of the industries maximizes savings on transport costs by being located near the sources of materials?

Iron and steel, aluminum, cement

6. The Earth rotates on its axis at an inclination of ___

23½°

7. The surface temperature of the sun is estimated as ___

6000 °C

8. Why are winters more severe in Southern Hemisphere than in Northern Hemisphere?

Northern Hemisphere receives more sunlight

9. Dolomite is a/an ___

Sedimentary rock

10. Where do most of the weather phenomena take place?

Troposphere

11. Colorado in U.S.A. is famous for this landform ___

Grand Canyon

12. Hailstorms are caused due to ___

freezing

13. Daily weather changes in the atmosphere are associated with ___

Troposphere

14. El Nino is ___

a warm ocean current

15. Duncan Passage is located between ___

South and Little Andaman

16. Mushroom Rocks are the typical land forms seen in ___

Deserts

17. The deepest ocean of the world is ___

Pacific ocean

18. The presence of ozone in the stratosphere is responsible for ___

checking the penetration of ultra-violet rays to the earth

19. Where in India can you normally spot the Siberian crane in winter?

Keoladeo Ghana Sanctuary

20. Which of the following type of coal has the lowest proportion of volatile matter?

Anthracite

21. At what height geosynchronous orbit is located?

36,000 km

22. The atmospheric layer reflecting radio waves is called ___

Ionosphere

23. The deepest surface depression on the earth is ___

Mariana Trench

24. Where the hot deserts are generally found?

On the western margins of the Tropics

25. Mist is caused by ___

water vapour at low temperature

26. Which from the following is a land-locked sea?

Aral Sea

27. Equatorial regions experience ___

hot and humid climate

28. When the barometer reading dips suddenly, it is an indication of ___

Storm

29. A place where there is constant intermingling of salt water and fresh water is ___

Estuary

30. What is ‘equinox’?

When the day and night are of equal duration it is called an equinox

Know Your World - 39

1. Isobars are lines joining places having equal ___

Pressure

2. Tropical grassland of Brazil is called ___

Campos

3. Land and sea-breezes occur due to ___

Convection

4. Basaltic lava is found in the ___

Deccan Trap

5. Mediterranean type of climate is characterized by ___

dry summer and wet winter

6. Which one of the following types of erosion is responsible for the formation of Chambal Ravines?

Gully

7. Which of the following winds is called anti-trade wind?

Westerlies

8. The orbits of planets around the sun may be ___

Great circular and parabolic

9. What is supernova?

A dying star

10. The term ‘Isoneph’ indicates the lines of equal ___

cloudiness

11. Hanging Valley is formed due, to the action of ___

Glacier

12. Which is the world’s largest desert?

Sahara

13. “Climate is extreme, rainfall is scanty, and the people used to be nomadic hoarders”. For which region is this statement correct?

Siberian Tundra

14. Shale is metamorphosed into which of the following rocks?

Slate

15. Which among the following coal contains 90 per cent of carbon?

Anthracite

16. Tropical storm in Chinese Sea is known as ___

Typhoon

17. The deepest trench of the world-The Mariana Trench’ is located in the ___

Pacific ocean

18. Trade winds blow from the ___

subtropical high pressure

19. Convectional Rainfall occurs in ___

Equatorial region

20. The residue left after extracting juice from sugar-beet and sugarcane is called ___

bagasse

21. Which of the following is called “brown paper”?

Tea

22. IR 20 and Ratna are two important varieties of ___

paddy

23. Nature of unemployment in agriculture in India is ___

seasonal and disguised

24. Which one of the following is related to Silviculture?

Forest crops

25. Jhum Cultivation is a method of cultivation which used to be practiced in ___

Central Highland

26. Indian agriculture is typically characterized as ___

land scarce, labor surplus economy

27. The term “Green Revolution” has been used to indicate higher production through ___

enhanced agricultural productivity per hectare

28. The gradation and standardization of agricultural products are conducted through ___

Directorate of Marketing and Inspection

29. Which of the following countries has highest percentage of land under cultivation?

U.SA.

30. In Indian agriculture, the period from July to October November is called ___

Kharif season