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WorksheetsBhabha Scientific Society Round 1
Total questions: 30
Worksheet time: 15mins
Which of the following statements is not correct?
Hepatitis B virus is transmitted much like HIV
Hepatitis B, unlike Hepatitis C, does not have a vaccine
Globally, the number of people infected with Hepatitis B and C viruses are several times more than those infected with HIV
Some of those infected with Hepatitis B and C viruses do not show the symptoms for many years.
What is the main cause of seasons on the Earth?
The tilt of the Earth's axis in relation to the sun
The distance between the Earth and the sun
The speed that the Earth rotates around the sun
Changes in the amount of energy coming from the sun
A baby blue whale drinks this many liters of milk per day
100
120
190
240
Recently, scientists observed the merger of giant ‘blackholes’ billions of light-years away from the earth. What is the significance of this observation?
‘Higgs boson particles’ were detected
‘Gravitational waves’ were detected
Possibility of inter-galactic space travel through ‘wormhole’ was confirmed.
It enabled the scientists to understand to ‘singularity’
What is the difference between Bluetooth and Wi-Fi devices
Bluetooth uses 2.4 GHz radio frequency band, whereas-Wi-Fi can use 2.4 GHz or 5 GHz frequency band
Bluetooth is used for Wireless Local Area Networks (WLAN) only, whereas Wi-Fi is used for Wireless Wide Area Networks (WWAN) only.
When information is transmitted between two devices using Blue-tooth technology, the devices have to be in the line of sight of each other, but when Wi-Fi technology is used the devices need not be in the line of sight of each other
Group of lions is a pride and a group of crows is a murder, but what is a group of dolphins called
POD
Herd
Gaggle
Fleet
Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this?
1. Dispersion
2. Refraction
3. Internal reflection
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
A married couple adopted a male child, A few years later; twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is
O positive
A positive
B positive
Cannot be determined on the basis of the given data
Which of the following diseases can be transmitted from one person to another through tattooing? 1. Chikungunya
2. Hepatitis B
3. HIV-AIDS
1 only
2 and 3 only
1 and 3 only
1, 2 and 3
The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
Ice is a bad conductor of heat
Since the surface of the lake is at the same temperature as the air, no heat is lost
The density of water is maximum at 4°C
None of the statements, given above is correct
Fruits stored in a cold chamber exhibit longer storage life because
exposure to sunlight is prevented
concentration dioxide in the is increased of carbon environment
rate of respiration is decreased
there is an increase in humidity
Which chemical was used earlier for giving anesthesia to patients?
Diethyl ether
ammonium dioxide
With reference to ‘LiFi’, recently in the news, which of the following statements is/are correct? 1.It uses light as the medium for high-speed data transmission.
2.It is a wireless technology and is several times faster than ‘WiFi. Select the correct answer using the code given below
1 only
2 only
Both 1 and 2
Neither 1 nor 2
The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?
Gravity is the strongest of the four
Electromagnetism act only on particles with an electric charge
Weak nuclear force causes radioactivity
Strong nuclear force holds protons and neutrons inside the nuclear of an atom.
With which polymer, the cabinets of radio and TV made of?
Polypropylene
Polystyrene
Teflon
Nylon
Ball bearings are used in bicycles, cars, etc., because
the actual between the is increased area of contact wheel and axle
the effective between the is increased area of contact wheel and axle
the effective between the is reduced area of contact wheel and axle
None of the above statements is correct
Match the following from inventions (List I) and inventors (List II)
List I List II
a. Tape Recorder 1. Micheal Faraday
b. Crascograph 2. James Watt
c. Steam Engine 3. J. C Bose
d. Dynamo 4. Poulson Select
Select the correct matching
a b c d
4 3 2 1
4 2 3 1
1 2 4 3
1 2 3 4
Name a fossil bird which looks like a bird but has many other features found in reptiles?
Dodo
Archaeopteryx
Flamingos
Mouse Bird
Who is known as the father of genetics?
Mendel
Darwin
Dalton
Marie Curie
Which of the following is not the components of photochemical smog that occurs in warm, dry and sunny climate?
NO2
O3
SO3
Unsaturated hydrocarbon
Which isotope is used through the radioactive age estimation technique to obtain (determine) the age of rocks?
Uranium isotope
Plutonium isotope
Thorium isotope
The chemical formula of the plaster of Paris is:
CaS04.5H2O
2CaS04. H2O
(CaS04)2. 2H2O
CaSO4. MgO
Which of the following is the striking contribution in Physics of Scientist Fahrenheit?
Fountain Pen
Gas Engine
Clinical Thermometer
Thermionic Emission
Why the Planets do not twinkle?
Because they emit light of a constant intensity
Because their distance from the earth does not change with time
Because they are very far away from the earth resulting in decrease in intensity of light
Because they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable
.The solution of one of the following compounds will conduct electricity. This compound is:
CCl4
HCl
CaCl2
CH3Cl
Which among the following gas was leaked at Bhopal during the Bhopal gas tragedy at 2-3 December 1984?
Methyl isocyanide
Methyl isocyanate
Methyl isochloride
Methyl isochlorate
Charles Goodyear is known for which of the following
Experiments on Rubber Plants
Vulcanization of Rubber
Invention of Radial Tyres
Invention of Artificial Rubber
A genetically engineered form of brinjal, known as the Bt-brinjal, has been developed. The objective of this is
To make it pest-resistant
To improve its taste and nutritive qualities
To make it drought-resistant
To make its shelf-life longer
1. Consider the following differences between Hard water and Soft water:
1) While hard water has high calcium and magnesium content, soft water has high sodium content
2) Hard water does not easily lather with soap, whereas soft water easily lather with soap
Which of the above statements is/are correct?
1 Only
2 Only
Both 1 & 2
Neither 1 nor 2
What is Tyndall effect?
scattering of a beam of light by the particles of a suspension
refraction of a beam of light by the particles of a solution
scattering of a beam of light by the particles of a colloid
reflection of a beam of light by the particles of a suspension
