Set - 8 Flashcards by Compitative Exams MCQs

What is the warmest Ocean?
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A. Pacific Ocean
B. Atlantic Ocean
C. Arctic Ocean
D. Indian Ocean

D. Indian Ocean

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What is the world’s warmest Sea?
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A. Red Sea
B. Mediterranean Sea
C. Caspian Sea
D. Arabian Sea

A. Red Sea

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Most of the ozone in the atmosphere is concentrated in the____________?
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A. Mesosphere
B. Troposphere
C. Stratosphere
D. Ionosphere

C. Stratosphere

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Material for rain-proof coats and tents owe their water proof properties to ________?
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A. Surface tension
B. Viscosity
C. Specific gravity
D. Elasticity

A. Surface tension

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For being able to see three-dimensional pictures we have to use___________?
1

A. A binocular
B. A camera
C. A epidiascope
D. A stereoscope

C. A epidiascope

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Vitamin C is found in_________?
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A. Sea Food
B. Seeds
C. Fruits and Vegetables
D. None of these

C. Fruits and Vegetables

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Vitamin B is found in__________?

A. Sea Foods
B. Fruits and Vegetables
C. Seeds
D. None of these

C. Seeds

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Which is the hottest planet in our Solar system?
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A. Venus
B. Neptune
C. Mars
D. None of these

A. Venus

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What is the symbol of Gold?
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A. Ag
B. Au
C. S
D. None

B. Au

The symbol for gold on the periodic table of elements is “Au,” derived from the Latin word “aurum.” The symbol “Au” comes from the Latin name for gold, which has been used for centuries to represent this precious metal.

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Which term describes the emission of light by a living organism?
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A. Natural light
B. Bioluminescence
C. Illumination
D. Mimicry

B. Bioluminescence

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If there is no capillarity?

A. It would be impossible to use a kerosene lamp
B. The blotting paper would fail to function
C. There would have been no plants on earth
D. All of above

D. All of above

If there were no capillarity, it would indeed have significant implications for the existence of plants on Earth. Capillarity, also known as capillary action, is the ability of liquids to flow in narrow spaces or tubes, such as the tiny vessels in plant tissues.

Capillarity has various applications in everyday life, ranging from the functioning of wicking materials in candles and paper towels to ink rising in a fountain pen or water being absorbed by a sponge. It is a fundamental concept in fluid dynamics and has implications in many scientific and engineering fields.

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The major component of honey is_________?
12

A. Glucose
B. Surcose
C. Maltose
D. Fructose

D. Fructose

The major component of honey is fructose. Honey is a food substance which is sweet and is produced by bees from the sugary secretions of plants. Honey gets its sweetness from glucose and monosaccharides fructose.

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A slow-running pendulum clock can be speeded up by_______________?

A. Increasing the length of the rod
B. Increasing the weight of the bob
C. Reducing the length of the rod
D. Reducing the weight of the bob

C. Reducing the length of the rod

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A man is standing on a weighing machine in a lift which is moving. The weighing machine will slow MINIMUM reading when, the lift is moving?
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A. Upward with uniform speed
B. Downward with uniform acceleration
C. In a free fall due to failure of the lift mechanism
D. None of these

C. In a free fall due to failure of the lift mechanism

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The property by virtue of which metals can be beaten into thin sheets is known as?
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A. Ductility
B. Malleability
C. Conductivity
D. Density

B. Malleability

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A tight-rope walker carries a long pole which he holds across his body. The purpose of this pole is to____________?
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A. Prop him up if he falls
B. Spread out his weight and reduce the pressure on the rope
C. Add extra weight to keep the rope tightly stretched
D. To keep the centre of gravity always vertically above the rope

D. To keep the centre of gravity always vertically above the rope

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During a total solar eclipse there is most likely to be_____________?
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A. A decrease in the rate of photosynthesis
B. An increase in the rate of photosynthesis
C. A decrease in the rate of respiration
D. No effect on either photosynthesis or respiration

A. A decrease in the rate of photosynthesis

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Heating element of an electric heater is made up of___________?
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A. Tungsten
B. Graphite
C. Chromium
D. Nichrome

D. Nichrome

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In an oil lamp, the oil rises up in the wick due to?
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A. Capillary action
B. Atmospheric pressure
C. Viscosity of oil
D. Change in temperature

A. Capillary action

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Why are soft drink made with chilled water rather than water at room temperature?
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A. Ingredients dissolve better in chilled water
B. Chilled water enhances the taste
C. Chilled water attracts more carbon dioxide
D. Chilled water is more hygienic

C. Chilled water attracts more carbon dioxide

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Coke is made by heating coal in the absence of air at__________?
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A. 700 °C
B. 900 °C
C. 1300 °C
D. 1700 °C

C. 1300 °C

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In blood, the percentage of water is___________?
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A. 75%
B. 85%
C. 90%
D. 95%

C. 90%

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As the temperature of ice rises, the ice melts and its density?

A. Decreases
B. Remain constant
C. Increases
D. Increases upto 10C

C. Increases

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Nitrogen occurs in plant and animals in the form of ___________?
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A. Minerals
B. Fats
C. Carbohydrates
D. Proteins

D. Proteins

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Air contains volume of carbon dioxide approximately? 0 A. 3% B. 33% C. 0.3% D. 0.03%

D. 0.03%

The gases which are used by drivers as an artificial atmosphere are helium and_____________? 0 A. Nitrogen B. Oxygen C. Neon D. Carbon monoxide

B. Oxygen

The second most abundant metal found in the earth’s crust is_____________? 0 A. Silicon B. Aluminium C. Calcium D. Sodium

A. Silicon

In BTU system, one BTU is equal to__________? 0 A. 2055 Joule B. 1155 Joule C. 2155 Joule D. 1055 Joule

D. 1055 Joule

In which system of units, gas bills are charged? 0 A. SI B. CGS C. BTU D. CNG

C. BTU

All forms of energy that we use are ultimately transformed into__________? 0 A. Electrical Energy B. Heat Energy C. Light Energy D. Chemical Energy

B. Heat Energy

The amount of energy in wheat is__________? 0 A. 100 K Calories/100 gram B. 245 K Calories/100 gram C. 348 K Calories/100 gram D. 490 K Calories/100 gram

C. 348 K Calories/100 gram

The major part of natural gas, petroleum and coal consists of? 0 A. Carbon B. Chlorine C. CFC D. Methane

D. Methane

What is used in making of alloys? 0 A. Gypsum B. Granite C. Chromium D. Lime-stone

C. Chromium

The large plates of solar pannels are painted? 0 A. Red B. White C. Yellow D. Black

D. Black

According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in_________? 0 A. 2 hours B. 5 hours C. 8 hours D. 10 hours

D. 10 hours

Units of electricity consumed by 2500 watt air-conditioner in one hour are_________? 0 A. 25 units B. 2.25 units C. 2.5 units D. 0.25 units

B. 2.25 units

In the electricity meter the digit to the extreme right is___________? 0 A. 1/5th of the unit B. 1/100 of the unit C. 1/10th of the unit D. 1/1000th of the unit

C. 1/10th of the unit

For water purification, we use? 0 A. Chlorine B. Bromine C. Plants D. Young man

A. Chlorine

The human blood is divided into__________ groups? 0 A. Two groups B. Three groups C. Four groups D. Five groups

C. Four groups

A man can survive without food for at least? 0 A. One month B. Two month C. Three month D. Four month

A. One month under normal circumstances, a person can typically survive without food for about three weeks to one month.

The muscles, tissues and blood all are made up of____________? 0 A. Carbohydrate B. Proteins C. Vitamins D. Fats

B. Proteins

One gram of carbohydrates give energy of the amount? 0 A. 2 K Calories B. 4.1 K Calories C. 6.3 K Calories D. 8.0 K Calories

B. 4.1 K Calories

What amount of fats give energy of 9.3 K Calories? 0 A. 0.5 gram B. 1.0 gram C. 2.0 gram D. 4.1 gram

B. 1.0 gram

Sound travels_______ in solid materials then liquid? 0 A. Constant B. Slowest C. Fastest D. None of these

C. Fastest

What Color does chlorophyll not absorb? 0 A. Red B. Blue C. Green D. Yellow

C. Green

One Torr is equivalent to how many mm of Mercury? 0 A. 1 mm B. 10 mm C. 100 mm D. 0.1 mm

A. 1 mm

Saliva contains__________? 0 A. Amylases B. Bite C. Trypsin D. None of these

A. Amylases Saliva contains amylases. Amylases are enzymes that help break down starches and complex carbohydrates into simpler sugars. These enzymes aid in the digestion of carbohydrates, starting the process of chemical digestion in the mouth.

Which of the following regulates the Metabolism Of Sugar? 0 A. Thyroid B. Insulin C. Glucose D. None of These

B. Insulin

Which Planet is Called Great Red Spot? 0 A. Neptune B. Mars C. Jupiter D. Mercury

C. Jupiter

Which blood group is universal receiver? 0 A. Group A B. Group B C. Group AB D. GROUP O

C. Group AB

Which type of motions are present in solid? 0 A. translational B. rotational C. vibrational D. all of these

C. vibrational

The alloy of aluminium used for making magnet is_________? 0 A. Duralumin B. Y-Alloy C. Alnico D. Aluminium bronze

C. Alnico

Which synthetic fibre is known as artificial Silk? 0 A. Nylon B. Rayon C. Cotton D. Terylene

B. Rayon The synthetic fiber known as "artificial silk" is rayon. Rayon is a manufactured fiber made from cellulose, typically derived from wood pulp or other plant-based materials. It is often referred to as "artificial silk" because it has a similar lustrous appearance and drape to natural silk.

Which variety of glass is heat resistant? 0 A. Bottle glass B. Flint glass C. Hard glass D. Pyrex glass

D. Pyrex glass

The chemical used as a fixer in photography is__________? 0 A. sodium sulphate B. borax C. sodium thiosulphate D. ammonium sulphate

C. sodium thiosulphate

Which one of the following is the softest? 0 A. sodium B. iron C. aluminium D. lithium

A. sodium

Nail polish remover contains___________? 0 A. Acetone B. Benzene C. Acetic acid D. Petroleum ether

A. Acetone

What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called? 0 A. Paint B. Glass C. Gun Powder D. Cement

C. Gun Powder

Which is the heaviest metal? 0 A. Iron B. Mercury C. Nickel D. Osmium

D. Osmium Osmium is a dense and extremely heavy metal. It is considered one of the densest elements and has a high atomic weight. It is often used in applications that require materials with high density, such as in the manufacturing of instrument pivots, electrical contacts, and fountain pen tips. Osmium is denser and heavier than iron, mercury, and nickel.

Bleaching action of chlorine is by________? 0 A. Oxidation B. Reduction C. Decomposition D. Hydrolysis

A. Oxidation

Bleaching powder contains___________? 0 A. Nitrogen B. Iodine C. Chlorine D. Bromine

C. Chlorine

Which one of the following gases is readily soluble in water at room temperature? 0 A. Chlorine B. Nitrogen C. Ammonia D. Carbon dioxide

C. Ammonia

Radon is___________? 0 A. germon radio B. radio active gas C. artificial fibre D. an explosive

B. radio active gas

Which of the following is the most toxic gas? 0 A. Carbon dioxide B. Carbon monoxide C. Nitrogen D. Hydrogen

B. Carbon monoxide

The 2018 Nobel Prize in Physiology or Medicine has been awarded jointly to James P Allison and Tasuku Honjo for their discovery of which cancer? 0 A. Chemotherapy B. Radiation C. Surgery D. Immunotherapy

D. Immunotherapy

Air Conditioning Controls:___________? 0 A. Circulation of the Air B. Humidity C. Temperature D. All of The Above

D. All of The Above

Earth rotates the sun in___________? 1 A. 23 hours 56 min 4 sec B. 24 hours C. 23 hours 57 min 9 sec D. Non of above

A. 23 hours 56 min 4 sec

Who created periodic table? 0 A. Faraday B. Lavoisier C. Arrhenius D. Mendeleev

D. Mendeleev One of the key contributors to the development of the periodic table was Dmitri Mendeleev, a Russian chemist. In 1869, Mendeleev published a version of the periodic table that arranged the known elements based on their atomic weights and chemical properties. He left gaps in the table for elements that were yet to be discovered, predicting their properties based on the trends he observed.

Bauxite is an ore of_________? 0 A. copper B. zinc C. aluminium D. iron

C. aluminium

Ruby is an oxide of__________? 0 A. silver B. gold C. platinum D. aluminium oxide

D. aluminium oxide

First Atomic theory was proposed by? 0 A. John Dalton B. E.Rutherford C. De Broglie D. D.I.Mendeleef

A. John Dalton John Dalton in the early 19th century, who provided experimental evidence and formulated the modern atomic theory. he first atomic theory was proposed by the ancient Greek philosopher Democritus. Democritus lived in the 5th century BCE and put forward the idea that all matter is composed of tiny, indivisible particles called atoms.

Air contains maximum amount of__________? 0 A. oxygen B. nitrogen C. hydrogen D. carbon dioxide

B. nitrogen Air contains the maximum amount of nitrogen. Nitrogen makes up about 78% of the Earth's atmosphere. Oxygen is the second most abundant gas in the atmosphere, constituting approximately 21%. The remaining 1% consists of trace gases, including argon, carbon dioxide, neon, helium, and other gases. Hydrogen and carbon dioxide are present in much smaller quantities in the Earth's atmosphere.

The alcohol used in the preparation of dynamite is________? 0 A. ethyl alcohol B. glycerol C. glycol D. methyl alcohol

B. glycerol

The element used in lead pencils is__________? 1 A. Zinc B. Lead C. Carbon D. Tin

C. Carbon

Epsom salt is chemically known as_________? 0 A. Copper Sulfate B. Magnesium Sulfate C. Ferrous Sulfate D. None of these

B. Magnesium Sulfate

Calcium sulphate is known as__________? 0 A. Epsom salt B. Gypsum salt C. Blue vitriol D. Potash alum

B. Gypsum salt

Oil of vitriol is_________? 0 A. Nitric acid B. Hydrochloric acid C. Phosphoric acid D. Sulfuric acid

D. Sulfuric acid

The term PVC used in the plastic industry stands for______________? 0 A. Phosphavinyl chloride B. Phosphor vanadiu chloride C. Polyvinyl chloride D. Polyvinyl carbobate

C. Polyvinyl chloride

Human bone does not contain_________? 0 A. Calcium B. Chondroitin sulfate C. Boron D. phosphate

C. Boron

Which of the following in the human body is affected by leukemia? 0 A. Blood B. Lungs C. Eyes D. Nerves

A. Blood

The reaction between methane and chlorine in diffused sunlight is__________? 0 A. Oxidation B. Reduction C. Polymerisation D. Radical substitution

D. Radical substitution

At what temperature does silver melt? 0 A. 275 °C B. 327 °C C.961.8 °C D. 100 °C

C.961.8 °C

Science is derived from Latin word “scientia” which means_________? 0 A. Reasoning B. Logic C. Knowledge D. Life

C. Knowledge

Calculus was invented by________? 0 A. Al-khawarzimi B. Pythagoras C. IsaaC Newton D. Al.kindi

C. IsaaC Newton

Analytical solutions to Quadratic equations were introduced by__________? 0 A. Al-Khawarzimi B. Al-haitham C. IsasacNewton D. Pythagoras

A. Al-Khawarzimi

Study of energy production in living bodies is called_________? 0 A. Biology B. Biomechanics C. Bioenergetics D. Aerodynamics

C. Bioenergetics

The study of rearing fine and intelligent human beings through genetics is called__________? 0 A. Eugenics B. Biotechnology C. Cloning D. Geneology

A. Eugenics

Name the drugs which block the sensory nerves and prevent the patient from feeling pain? 0 A. Analgesics B. Antibiotics C. Antihistamines D. Anaesthetics

D. Anaesthetics

Inside which organ is the gallbladder located? 0 A. Pancreas B. Liver C. Kidney D. Small intestine

B. Liver

Who first discovered how blood circulates in the human body? 0 A. Edward Jenner B. Joseph Lister C. William Harvey D. Gregor Mendel

C. William Harvey William Harvey, an English physician, is credited with the discovery of how blood circulates in the human body. In the early 17th century, Harvey published his findings in a book called "De Motu Cordis" (On the Motion of the Heart), where he detailed his observations and experiments on the circulation of blood.

Through which organ does a fish respire? 0 A. Nose B. Lungs C. Gills D. Fins

C. Gills

Which lenses are used by people having short-sightedness? 1 A. Convex B. Concave C. Concavo-convex D. Plain

B. Concave People with short-sightedness, also known as myopia, typically use concave lenses to correct their vision. Concave lenses are thinner at the center and thicker at the edges, causing light rays to diverge before entering the eye. This helps to shift the focus of the incoming light rays forward, allowing them to form a clear image on the retina. By using concave lenses, the refractive error of myopia is effectively corrected, enabling individuals to see distant objects more clearly.

Which of the following animals does not have nervous system? 0 A. Bat B. Squirrel C. Sponges D. Lizard

C. Sponges Sponges are multicellular organisms that belong to the phylum Porifera. They are considered one of the simplest forms of animal life and lack a centralized nervous system. While sponges do have specialized cells called choanocytes that can respond to external stimuli, they do not possess a complex nervous system like bats, squirrels, or lizards.

Which of the following is caused by a deficiency of iron in the diet? 0 A. Giotre B. Scurvy C. Anaemia D. Rickets

C. Anaemia Iron-deficiency anaemia results in a decreased production of healthy red blood cells, leading to symptoms such as fatigue, weakness, pale skin, shortness of breath, and difficulty concentrating.

A group of elephants is called___________? 1 A. ZEAL B. Herd C. MOB D. TOWER

B. Herd

Which liquid is used in an aneroid barometer? 0 A. Mercury B. Alcohol C. Water D. None

D. None An aneroid barometer does not use a liquid. Unlike a mercury barometer, which utilizes the height of a column of mercury to measure atmospheric pressure, an aneroid barometer employs a mechanical mechanism consisting of a flexible metal box (aneroid cell) that expands or contracts in response to changes in air pressure. This mechanical movement is then translated into a measurement on a scale, indicating the atmospheric pressure. Since there is no liquid involved, the aneroid barometer is not affected by issues such as evaporation or freezing that may be encountered with liquid-based barometers.

What is the range, in hertz, of the normal human hearing? 0 A. 10 Hz to 10 kHz B. 20 Hz to 20 kHz C. 2000Hz D. 40 Hz to 40 kHz

B. 20 Hz to 20 kHz

Who invented Logarithm Tables? 0 A. John Napier B. John Doe C. John Harrison D. John Douglas

A. John Napier

How many pairs of walking legs does a cockroach have? 0 A. One B. Two C. Three D. Four

C. Three

What causes mumps? 0 A. Fungus B. Bacterium C. Deficiency of vitamins D. Virus

D. Virus Mumps is caused by a virus that spreads easily from person to person through infected saliva

In the treatment of which disease is dialysis used? 0 A. Ulcers B. Heart failure C. Kidney failure D. Brain tumour

C. Kidney failure