Basic Information of Daily Science Inventions and
Entomology is the science that studies--
- Human behavior
- Insects
- The formation of rocks
- None of the above
সঠিক উত্তরঃ Insects
Which one of these planets is nearest to the earth?
- Murcury
- Venus
- Neptune
- None of these above
সঠিক উত্তরঃ Venus
Acquired Immune Deficiency Syndrome (AIDS) is caused by
- Bacteria
- Fungus
- Virus
- None of the above
সঠিক উত্তরঃ Virus
A Biologist specializing in the study of insects is called---
- an herpetologist
- a paleontologist
- an entomologist
- an ornithologist
সঠিক উত্তরঃ an entomologist
Ozone depletion is caused by----
- Carbon monoxide
- Carbon dioxide
- Chloroflurocarbon
- Mercuric Oxide
সঠিক উত্তরঃ Chloroflurocarbon
- Protons and Quarks
- Neutrons, Gamma Rays and Positrons
- Protons, Neutrons and Electrons
- Positrons, Neutrons and Electrons
সঠিক উত্তরঃ Positrons, Neutrons and Electrons
Enzymes and anti-bodies are mainly made of---
- Carbohydrate
- Fats
- Proteins
- Vitamins
সঠিক উত্তরঃ Proteins
Where is the sea of Tranquility?
- In the pacific ocean
- In the atlantic ocean
- On the moon
- Near the bermuda triangle
সঠিক উত্তরঃ On the moon
The three methods of science are observation, experimentation and ----.
- deduction
- hypothesis
- measurement
- inference
সঠিক উত্তরঃ measurement
Who wrote the book "The Origin of Species"?
- Sir Alexander Fleming
- Louis Pasteur
- Charles Darwin
- Stephen Hawking
সঠিক উত্তরঃ Charles Darwin
Which food stuff turns blue-black when brought in contact with iodine?
- Unsaturated fatty acids
- Starch
- Proteins
- Vitamins
সঠিক উত্তরঃ Starch
The response of plants to light is known as--
- Chemotropism
- Thigmotropism
- Phototropism
- Hydrotropism
সঠিক উত্তরঃ Phototropism
Which of the following helps keep body cool?
- Mastication
- Urination
- Perspiration
- Respiration
সঠিক উত্তরঃ Perspiration
Which of the following carries malaria?
- Bats
- Earthworms
- Mosquitoes
- Cockroaches
সঠিক উত্তরঃ Mosquitoes
- Removing pimples
- Curing malaria
- Curing aids
- Curing typhoid
সঠিক উত্তরঃ Curing malaria
Farmers can keep their soil fertile by--
- Crop rotation
- Regular tilling
- Repeatedly growing the same crop
- Irrigation
সঠিক উত্তরঃ Crop rotation
Quinine is obtained from the bark of which tree?
- Bunyan
- Cinchona
- Redwood
- Eucalyptus
সঠিক উত্তরঃ Cinchona
What is the name given to the green pigment in plants?
- tendrils
- starch
- stomata
- chlorophyll
সঠিক উত্তরঃ chlorophyll
What is the pulse rate of an average healthy human beings?
- 100 beats per minute
- 72 beats per minute
- 65 beats per minute
- 80 beats per minute
সঠিক উত্তরঃ এখানে সঠিক উত্তর নেই।
- south to north
- west to east
- east to west
- north to south
সঠিক উত্তরঃ west to east
Which of the following is a main component of comon glass?
- powdered mica
- marble
- water
- sand
সঠিক উত্তরঃ sand
- renewable source of energy
- very limited source of energy
- non renewable source of energy
- polluting source of energy
সঠিক উত্তরঃ renewable source of energy
What is the name given to molten rocks that are erupted by a volcano?
- lava
- slate
- firestone
- marble
সঠিক উত্তরঃ lava
Natural hot water springs occuring in New Zealand, Italy and Iceland are known as--
- old faithfuls
- fountains
- geysers
- hot bubbles
সঠিক উত্তরঃ geysers
Removal of the top layer of soil/rocks by wind, water is known as--
- desalination
- detoxification
- erosion
- corrosion
সঠিক উত্তরঃ erosion
The length of the days and nights is equal at the--
- south pole
- tropic of capricorn
- equator
- north pole
সঠিক উত্তরঃ equator
A space that contains no air or any gas is known as--
- vavuum
- hollow
- pressurized cabin
- bubble
সঠিক উত্তরঃ vavuum
The lower, dense region of the atmosphere is known as--
- stratosphere
- hydrosphere
- troposphere
- inosphere
সঠিক উত্তরঃ troposphere
What is the name given to the respiratory holes on the surface of a leaf?
- tendrils
- pits
- stomata
- chlorophyll
সঠিক উত্তরঃ stomata
- ice with salt added
- any frozen liquid
- solid carbon dioxide
- very cold ice
সঠিক উত্তরঃ solid carbon dioxide
Which gas in the atmosphere saves us from the UV rays of the sun?
- oxygen
- carbon monoxide
- ozone
- nitrogen
সঠিক উত্তরঃ ozone
When we breathe which of the following gases do we use?
- carbon dioxide
- hydrogen
- oxygen
- helium
সঠিক উত্তরঃ oxygen
Which of the following is necessary for a substance to burn?
- gasoline
- hydrogen
- oxygen
- light
সঠিক উত্তরঃ oxygen
On burning charcoal which of the following gases is produced?
- nitrous oxide
- hydrogen
- carbon dioxide
- oxygen
সঠিক উত্তরঃ carbon dioxide
A barometer is used for measuring--
- annual rainfall
- humidity
- atmospheric pressure
- temperature
সঠিক উত্তরঃ atmospheric pressure
Which of the following is not a constituent of the atmosphere?
- nitrogen
- carbon dioxide
- aluminium
- oxygen
সঠিক উত্তরঃ aluminium
Which one of the following gases is not a greenhouse gas?
- nitrous oxide
- methane
- chloroflurocarbons
- carbon dioxide
সঠিক উত্তরঃ nitrous oxide
Which one of the following is not a plantation crop?
- rubber
- sugarcane
- coffee tea
- all of these
সঠিক উত্তরঃ sugarcane
One of the following metals, which one pollutes the air of a busy city?
- lead
- copper
- cadmium
- chromium
সঠিক উত্তরঃ lead
The increase in carbon dioxide in the atmosphere cause---
- no change in earth temperature
- increase in ultraviolet rays
- rise in earth temperature
- fall in earth temperature
সঠিক উত্তরঃ rise in earth temperature
Which of the following was the world's worst industrial disaster?
- Minamata Syndrome
- The Tree Mile Island mishap
- Chernobyl nuclear accident
- Bhopal gas tragedy
সঠিক উত্তরঃ এখানে সঠিক উত্তর নেই।
Which one of the following serves as host tree for silkworm to produce good silk?
- hibiscus
- chrysanthemum
- banyan tree
- mulberry
সঠিক উত্তরঃ mulberry
Which one of the following is responsible for the depletion of ozone layer?
- PAN
- sulphur oxide
- chloroflurocarbons
- methane
সঠিক উত্তরঃ chloroflurocarbons
Which one of the following crops requires continuous semi-aquatic condition for cultivation?
- sugarcane
- ground nut
- wheat
- rice
সঠিক উত্তরঃ rice
Which one of the following is an air-pollutant present in the atmosphere?
- nitrogen
- hydrogen
- oxygen
- carbon monoxide
সঠিক উত্তরঃ carbon monoxide
Which one of the following contributes largely to the green-house gas effect?
- water vapour
- ozone
- carbon dioxide
- carbon monoxide
সঠিক উত্তরঃ carbon dioxide
Which of the following is the most toxic gas?
- nitrogen
- hydrogen
- carbon dioxide
- carbon monoxide
সঠিক উত্তরঃ carbon monoxide
Dimond and graphite are similar in---
- electric conductivity
- atomic weight
- crystal structure
- density
সঠিক উত্তরঃ atomic weight
What is the correct increasing order of abundance of the main components of air?
- nitrogen, oxygen and argon
- nitrogen, argon and oxygen
- oxygen, nitrogen and argon
- argon, nitrogen and oxygen
সঠিক উত্তরঃ argon, nitrogen and oxygen
Which one of the following nitrogenous fertilizers is not very effective in acidic soils?
- nitrolin
- calcium nitrate
- ammonium sulphate
- urea
সঠিক উত্তরঃ urea
- Carbon Di-oxide
- Hydrogen sulphide
- Oxygen
- Nitrogen
সঠিক উত্তরঃ Hydrogen sulphide
Which of the following acids is most important in building tissue proteins?
- lactic
- saturated fatty
- linoleic
- amino
সঠিক উত্তরঃ amino
Which of the following is the only liquid metal?
- Mercury
- Water
- Hydrogen
- Chlorine
সঠিক উত্তরঃ Mercury
What are elements containing the same number of protons but different number of neutrons called?
- compounds
- allotropes
- isotopes
- isobars
সঠিক উত্তরঃ isotopes
Stainless steel is an alloy of iron and--
- nickel, manganese and chromium
- nickel, cobalt and manganese
- nickel and chromium
- chromium and tungsten
সঠিক উত্তরঃ nickel, manganese and chromium
What is known as the universal solvent?
- Hydrochloric Acid
- Aqua Regia
- Water
- Sulphuric Acid
সঠিক উত্তরঃ Water
In tritinum, electrons, protons and neutrons are present in the ratio of--
- 1 : 1 : 2
- 1 : 2 : 1
- 1 : 1 : 0
- 1 : 1 : 1
সঠিক উত্তরঃ 1 : 1 : 2
Which one of the following metals does not react even with boiliing water?
- magnesium
- calcium
- beryllium
- potassium
সঠিক উত্তরঃ beryllium
Which one of the following metals reacts very rapidly with water at room temperature?
- magnesium
- calcium
- beryllium
- potassium
সঠিক উত্তরঃ calcium
Which of the following can be used both as an oxidizing agent and as a reducing agent?
- sodium nitrite
- sodium sulphide
- sodium thiosulphate
- sodium nitrate
সঠিক উত্তরঃ sodium nitrate
What type of iron is obtained from blast furnace?
- wrought iron
- soft iron
- pig iron
- cast iron
সঠিক উত্তরঃ cast iron
What are the main constituents of biogas?
- butane and carbon-dioxide
- methane and carbon-monoxide
- methane and carbon-dioxide
- ethylene and carbon-dioxide
সঠিক উত্তরঃ methane and carbon-dioxide
Which among the following is a natural polymer?
- terylene
- polyester
- rubber
- plastic
সঠিক উত্তরঃ rubber
Cooking oil is converted into vegetable ghee through which process?
- crystallization
- cracking
- hydrogenation
- oxidation
সঠিক উত্তরঃ hydrogenation
Which of the following compounds are responsible for acid rain?
- nitrogen dioxide and carbon monoxide
- silicon dioxide and carbon monoxide
- nitrogen dioxide and silicon dioxide
- nitrogen dioxide and sulphur dioxide
সঠিক উত্তরঃ nitrogen dioxide and sulphur dioxide
Which of the following sulphur compound is used as a bleaching agent in textile industry?
- sulphuric acid
- hydrogen sulphide
- carbon disulphide
- sulphur dioxide
সঠিক উত্তরঃ sulphur dioxide
- calcium and potassium
- calsium and magnesium
- calsium and sodium
- magnesium and sodium
সঠিক উত্তরঃ magnesium and sodium
Marble is a changed form of which of the following?
- limestone
- basalt
- graphite
- coal
সঠিক উত্তরঃ limestone
Which of the following compound is used in the manufacturing of baking powder?
- calcium oxide
- sodium bicarbonate
- sodium carbonate
- silicon carbide
সঠিক উত্তরঃ sodium carbonate
By what name is water which contains soluble salts of calcium and magnesium known?
- hard water
- mineral water
- soft water
- heavy water
সঠিক উত্তরঃ hard water
Which one of the following substances undergoes chemical change on heating?
- lead nitrate
- platinum wire
- sodium chloride
- silica
সঠিক উত্তরঃ lead nitrate
- lipids
- carbohydrates
- arganic acids
- amino acids
সঠিক উত্তরঃ carbohydrates
Which gas is present under pressure in soft drinks?
- Carbon Di-oxide
- Nitrous oxide
- Oxygen
- Nitrogen
সঠিক উত্তরঃ Carbon Di-oxide
Which one of the following is used for bleaching purposes?
- bromine
- iodine
- fluorine
- chlorine
সঠিক উত্তরঃ chlorine
To glavanise iron, iron is coated with which of the followiing?
- galena
- silver
- aluminium
- zinc
সঠিক উত্তরঃ zinc
Which one of the following forms an irreversible complex with hemoglobin of the blood?
- pure nitrogen gas
- a mixture of carbon dioxide and helium
- carbon monooxide
- carbon dioxide
সঠিক উত্তরঃ carbon monooxide
Among the following which is the purest form of iron?
- grey cast iron
- wrought iron
- steel
- white cast iron
সঠিক উত্তরঃ wrought iron
For which of the following purposes is a transformer used?
- measurement of flow of electricity
- conversion of low voltage into high voltage and vice versa
- conversion of DC into AC
- regulation of fluctuation of voltage
সঠিক উত্তরঃ conversion of low voltage into high voltage and vice versa
Dry sand appears bright while wet sand appears dark because of--
- optical illusion
- diffraction
- reflection
- refraction
সঠিক উত্তরঃ reflection
Heating element of an electric heater is made up of--
- Chromium
- Nichrome
- Tungsten
- Graphite
সঠিক উত্তরঃ Nichrome
Which one of the completed the 100th anniversary of its discovery in 1995?
- X-rays
- diesel engine
- detergents
- photography
সঠিক উত্তরঃ X-rays
Which of the following is a device for storing electric charge?
- compass
- cyclotron
- capacitor
- counter
সঠিক উত্তরঃ capacitor
Which of the following is not a radio active metrial?
- plutonium
- sodium
- uranium
- radium
সঠিক উত্তরঃ sodium
Which of the following is a renewable source of energy?
- coal
- biomass
- petroleum
- kerosene
সঠিক উত্তরঃ biomass
One liter of water is equivalent to how many kilograms?
- 1.25 kg
- 0.90 kg
- 1.5 kg
- 1 kg
সঠিক উত্তরঃ 0.90 kg
While functioning what is the temperature level inside a refrigerator?
- 350°
- 500°
- 400°
- 450°
সঠিক উত্তরঃ 400°
On which principle does the tape recorder function?
- Boyleis law
- electromagnetic induction
- eletrovalency
- All of these
সঠিক উত্তরঃ electromagnetic induction
Which of the following is the main source of energy of the sun?
- nuclear fission
- nuclear fusion
- both fission and fusion
- All of these
সঠিক উত্তরঃ nuclear fusion
A nuclear reactor is a device to produce nuclear energy with the help of---
- controlled chain reaction
- graphite as fuel
- nuclear fusion
- uncontrolled chain reaction
সঠিক উত্তরঃ controlled chain reaction
Which of the following is the mde of propagation of heat from the sun to the earth?
- radiation alone
- convection and radiation
- conduction
- convection alone
সঠিক উত্তরঃ radiation alone
Which of the following statements is true?
- temperature decreases with increase in altitude
- temparatur increaseswith increase in altitude
- temperature remains the same at any altitude
- All of these
সঠিক উত্তরঃ temperature decreases with increase in altitude
Who invented the miner's safety-lamp?
- Thomas Savery
- Sir Frank Whittle
- Sir Thomas Malory
- Alexander Graham Bell
সঠিক উত্তরঃ Sir Frank Whittle
The tendency of a liquid drop to assume spherical shape is due to--
- density
- vapour pressure
- surface tension
- viscosity
সঠিক উত্তরঃ surface tension
Which of the following is the working principle of a washing machine?
- reverse osmosis
- diffusion
- centrifugation
- dialysis
সঠিক উত্তরঃ centrifugation
Which human gland does secret growth hormone?
- Pituitary Gland
- Liver
- Pancreas
- Thalamus
সঠিক উত্তরঃ Pituitary Gland
Which one of the following gases is predominant in the atmosphere?
- Carbon Di-oxide
- Oxygen
- Argon
- Nitrogen
সঠিক উত্তরঃ Nitrogen
Who among the the following is associated with the invention of computers?
- Mac Millen
- Rangabhashyam
- Edison
- Babbage
সঠিক উত্তরঃ Babbage
Who among the following evolved the concept of relationship between mass and energy?
- Dalton
- Rutherford
- Einstein
- Planck
সঠিক উত্তরঃ Einstein
The telephone was invented by---
- Thomas More
- James Watt
- James Arkwright
- Alexander Graham Bell
সঠিক উত্তরঃ Alexander Graham Bell
- Study of smells
- study of muscles
- Study of bones
- Study of Birds
সঠিক উত্তরঃ Study of Birds
- Different races of mankind
- Genetics of plants
- Alteringhumans beings by changing their genetic components
- People of European
সঠিক উত্তরঃ Alteringhumans beings by changing their genetic components
Study of life in outer space is known as--
- Enterobiology
- Neobiology
- Endobiology
- Exobiology
সঠিক উত্তরঃ Exobiology
- Relation between Organisms and their environment
- Tissues
- Birds
- Cell formation
সঠিক উত্তরঃ Relation between Organisms and their environment
Anatomy is the branch of science which deals with--
- Animal behavior
- Cells and tissues
- Structure of animals and plants
- Functioning of body organs
সঠিক উত্তরঃ Structure of animals and plants
Which of the following pairs is incorrect?
- Faraday : Diffusion of gases
- Pasteur : Bacteriology
- Roentgen : X-ray
- Newton : Law of Gravitation
সঠিক উত্তরঃ Faraday : Diffusion of gases
Wright Brothers are regarded inventors of the----
- Aeroplane
- Honda
- Balloon
- Bicycle
সঠিক উত্তরঃ Aeroplane
Blaze Pascal is associated with---
- Computer
- Cinema
- Television
- Calculating Machine
সঠিক উত্তরঃ Calculating Machine
Choose the correct combination--
- Evolution : Darwin
- Aeroplane : Harway
- Typewriter : Remington
- Dynamite : Dunlop
সঠিক উত্তরঃ Evolution : Darwin
- J. L. Baird : Television
- J. Perkins : Penicillin
- James Watt : Steam Engine
- A. G. Bell : Telephone
সঠিক উত্তরঃ J. Perkins : Penicillin
The credit of developing the polio vaccine goes to--
- Selman Waksman
- John Sleeman
- Jonas Salk
- Alb E. Sabin
সঠিক উত্তরঃ Jonas Salk
Who was the surgeon who pioneered antiseptic surgery in 1865?
- Henry William
- John Sleeman
- Edward Jenner
- Joseph Lister
সঠিক উত্তরঃ Joseph Lister
The first attempt in printing was made in England by--
- William Caxton
- Isaac Newton
- James Arkwright
- James Watt
সঠিক উত্তরঃ William Caxton
Who discovered circulation of blood in human body?
- William Harvey
- Jonon Esals
- Edward Jenner
- Joseph Lister
সঠিক উত্তরঃ William Harvey
Who among following invented the steam engine?
- Thomas Savery
- Wright Brothers
- Marconi
- James Watt
সঠিক উত্তরঃ James Watt
The scientist who first discovered that the earth rrevolves round the sun was--
- Copernicus
- Einstein
- Newton
- Dalton
সঠিক উত্তরঃ Copernicus
Which instrument is used to measure pressure?
- Saccharimeter
- Ammeter
- Manometer
- Lactometer
সঠিক উত্তরঃ Manometer
Which of the following is not the name of Greek God?
- Venus
- Neptune
- Pluto
- Jupiter
সঠিক উত্তরঃ এখানে সঠিক উত্তর নেই।
What causes an eclips of the sun?
- when the earth comes in between the moon and the sun
- when the sun comes in between the earth and the moon
- when the moon comes in between the earth and the sun
- when the mars comes in between the sun and the moon
সঠিক উত্তরঃ when the moon comes in between the earth and the sun
HIV AIDS can be spread through--
- Mosquito bite
- Used Injection syringe
- A sexual physical contact
- Polluted drinking water
সঠিক উত্তরঃ এখানে সঠিক উত্তর নেই।
Which planet has recently been the target of a lot of controversy?
- Saturn
- Pluto
- Jupiter
- Neptune
সঠিক উত্তরঃ Pluto
Which of the followings is not a part of milk?
- Proteins
- Carbohydrate
- Sugar
- Fat
সঠিক উত্তরঃ এখানে সঠিক উত্তর নেই।
Hepatitis C increases the risk of--
- Blood Cancer
- Stomach Cancer
- Liver Cancer
- HIV AIDS
সঠিক উত্তরঃ Liver Cancer
With which device are earthquakes recorded?
- Barometer
- Oscillator
- Voltmeter
- Seismograph
সঠিক উত্তরঃ Seismograph
Anopheles mosquito causes which of the following deases?
- Dengue
- Malaria
- Typhoid
- Cholera
সঠিক উত্তরঃ Malaria
A citrus fruit means that the fruit is rich in--
- Carbohydrate
- Vitamin B
- Vitamin C
- Vitamin A
সঠিক উত্তরঃ Vitamin C
- SMART-1
- SAT-1
- Discovery
- Apollo
সঠিক উত্তরঃ SMART-1
SMS available in mobile phone stands for--
- System of Marketing Service
- System Management
- Short Message Service
- Support Management System
সঠিক উত্তরঃ Short Message Service
The Richter scale is used for measuring---
- Tsunami
- Flood
- Hurricane
- Earthquake
সঠিক উত্তরঃ Earthquake
Which one of the following has the shortest wave length?
- Alpha-ray
- Beta-ray
- X-rey
- Gamma-ray
সঠিক উত্তরঃ Gamma-ray
Hygrometer is used to measure--
- relative humidity
- purity of milk
- specific gravity of a liquid
- intensity of earthquakes
সঠিক উত্তরঃ relative humidity
- quality of liquid
- length of light waves
- length of cables
- speed of ships
সঠিক উত্তরঃ length of light waves
Which disease appeared as a threat to our poultry sector in recent years?
- Chiken Anaemia
- Avian Leukosis
- Avian pox
- Avian Influenza
সঠিক উত্তরঃ Avian Influenza
What is the acceptable safe limit of Arsenic per liter of water?
- 0.01 mg
- 0.001 mg
- 0.20 mg
- 0.02 mg
সঠিক উত্তরঃ 0.01 mg
Submarin cable is the term used in--
- Education system
- Communication system
- Data transformation
- Information Technology
সঠিক উত্তরঃ এখানে সঠিক উত্তর নেই।
"To every action there is an equal and oposite reaction"-- this theory has been given by--
- Copernicus
- Newton
- Alexander
- Archimedes
সঠিক উত্তরঃ Newton
What is the difference between Bangladesh Standard Time and Greenwich Mean Time?
- 6 hours
- 8 hours
- 10 hours
- 5 hours
সঠিক উত্তরঃ 6 hours
The Lunar Eclipse occurs when?
- The Moon lies between the Sun and the Earth
- The Earth lies between the Sun and the Moon
- The Sun lies between the Earth and the Moon
- When the new Moon occurs
সঠিক উত্তরঃ The Earth lies between the Sun and the Moon
Which organization of UNO declared prohibition on Clone human chiled?
- UNDP
- WHO
- UNESCO
- WFO
সঠিক উত্তরঃ WHO
Wher is the headquarters of the UN Security council located at?
- Washington
- Paris
- New York
- Tokyo
সঠিক উত্তরঃ New York
What is there in the North Polar region?
- Arctic Ocean
- Anterctic Ocean
- Antarctica Continent
- Arctic continent
সঠিক উত্তরঃ Arctic Ocean
Every atom of Carbon di-oxide contains -- Oxygen and --- Carbon.
- 1, 2
- 2, 1
- 1, 1
- 2, 2
সঠিক উত্তরঃ 2, 1
What do scientists beleve global warming is caused by?
- The earth getting older
- Human activity
- Changes in animals
- The rainforest
সঠিক উত্তরঃ Human activity
- Galileo
- Joseph Priestly
- Neil Bohre
- Newton
সঠিক উত্তরঃ Joseph Priestly
What is the scientific name of Vitamin C?
- Nitric Acid
- Ascorbic Acid
- Blue Berry
- Black Berry
সঠিক উত্তরঃ Ascorbic Acid
What invention bought Alfred Nobel fame and fortune?
- Electricity
- Radio
- Television
- Dynamite
সঠিক উত্তরঃ Dynamite
Who developed the small pox vaccination?
- Eduard Jenner
- Alexander Fleming
- Albert Einstein
- Isaac Newton
সঠিক উত্তরঃ Eduard Jenner
The freezing point in Farenheit thermometer is:
- 32° Farenheit
- 0° Farenheit
- 212° Farenheit
- 1° Farenheit
সঠিক উত্তরঃ 32° Farenheit
Sir Jagadish Chandra Bose is famous for his contribution in the field of--
- Physics
- Biology
- Bengali Literature
- All of the previous
সঠিক উত্তরঃ Biology
- H1N2
- H2N2
- H2N1
- H1N1
সঠিক উত্তরঃ H1N1
- ইমার্জেন্সী-মেইল
- ইলেক্ট্রনিক-মেইল
- এক্সপ্রেস-মেইল
- ইজি-মেইল
সঠিক উত্তরঃ ইলেক্ট্রনিক-মেইল
ডুবোজাহাজে কোন যন্ত্রের সাহায্যে পানির নিচ থেকে উপরের দৃশ্য দেখা যায়?
- পেরিস্কোপ
- টেলিস্কোপ
- মাইক্রোস্কোপ
- স্টেথোস্কোপ
সঠিক উত্তরঃ পেরিস্কোপ
- খনির ভিতর
- পাহাড়ের উপর
- মেরু অঞ্চলে
- বিষুব অঞ্চলে
সঠিক উত্তরঃ মেরু অঞ্চলে
দিন-রাত্রি সমান থাকে কোন তারিখে?
- ২১ জুন ও ২২ ডিসেম্বর
- ২২ ডিসেম্বর ও ২২ ফেব্রুয়ারি
- ২৩ সেপ্টেম্বর ও ২১ মার্চ
- ২১ মে ও ২১ জুলাই
সঠিক উত্তরঃ ২৩ সেপ্টেম্বর ও ২১ মার্চ
The name of the device used in measuring earthquake is--
- Barometer
- Oscillator
- Voltmeter
- Seismograph
সঠিক উত্তরঃ Seismograph