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RRB NTPC 2019-20 official notification is yet to be released, however according to Piyush Goyal the RRB NTPC CBT 1 exam starts from 15th Dec, 2020. This is one such exam that has no dearth of candidates participating thus, competition is going to high. In this PDF we have come with 100 important questions each of Physics, Chemistry and Biology respectively. Have a look and check how many of these questions’ answers you already knew. Before these questions we would like to brief you on the RRB NTPC 2019-20 exam pattern. In this we are giving free PDF to download 100 important questions each on Physics, Chemistry and Biology respectively. Download Free PDF.

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RRB NTPC CBT 1 2019-20 Exam Pattern

According to the RRB NTPC recruitment the exam pattern for stage I is mentioned below:

SectionsNo. of QuestionsTotal MarksDuration
Mathematics3030

90 minutes
General Intelligence and Reasoning3030 
General Awareness4040 
Total100100

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As we can see that General Awareness section scores maximum number of questions and maximum marks as well, this it has to be prepared very well. Moreover, its a scoring section too. Here are 100 important practice questions each for the Physics, Chemistry and Biology respectively.

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100 Important Physics Questions – RRB NTPC 2019-20

S. No.QuestionAnswer
1A four-stroke petrol engine theoretically operates on _____.Otto Cycle
2A piece of wood is underwater. The upthrust on it will be ______.Less than the weight of the wood
3A sound wave has a frequency of 2 kHz and wave length 35 cm. How long will it take to travel 1.5 km?2.1 seconds
4A stone is dropped from a certain height. Its kinetic energy will be maximum at?Just before it touches the ground
5Acceleration due to gravity is minimum at?Equator
6Air has maximum proportion of which inert gas?Argon
7An electrical lamp lights for 4 hours and draws a current of 0.5 A. Calculate the amount of charge flowing through the lamp.7200 C
8At what temperature Degree & Kelvin scale are the same?Zero
9Current 3A flows for the duration of 1 minute. What is the value of charge transferred?900 Coulombs
10Decibel unit is used to measureSound intensity
11Diode Bulb was discovered by ________.Sir J. S. Fleming
12Electric current in a metal wire is due to the flow ofElectrons
13Electric Motor converts _____ energy to mechanical energy.Electrical
14Electrons in Good conductors are _______.Loosely bound
15For which of his discovery was Albert Einstein awarded the Nobel Prize?Law of the Photoelectric Effect.
16How can the depth of sea be measured?Echosounding (how fast sound travels in the water)
17How does sound travel in air?Wave Compression
18How is Radioactivity measured?Disintegrations per second
19How is the electric current measured?Ammeter
20How to convert Galvanometer to Voltmeter?By connecting a high resistance in series with it
21If a person’s mass at earth is 66 kg, what will be his mass at the moon?66 kg
22If an astronaut is in space, the sky will appear to him as ______.Black
23If an object is placed at the centre of curvature, where will the image be formed?At the centre of curvature
24If light travels from air to glass, what will happen to the refracted ray?They refract twice
25If the focal length is 15 cm, and u is given as 10 cm then find the value of v?6 cm
26If the radius of curvature is 10 cm, find the focal length?5 cm
27If the temperature of a fluid is increased, then what happens to viscocity?It decreases
28In a television picture tube, deflection is produced by ______.Magnetic Field
29In which substance, the resistant decreases as the temperature increases?Pure Silicon
30Joule/coulomb is the unit of what?Electric Potential
31Lambert’s Law is related to ______.Illumination
32Light beam which is highly directional is called ______.Laser
33Mercury thermometers can be used to measure temperature up to _____?-37 to 360 °C.
34Mirage is an example of _____.Refraction and total internal reflection of light
35Red light is used at traffic signals because ______.Red light disperses the least
36Refractive Index is equal to what?Ratio of velocity of light in a vacuum to that in a defined material
37Rutherfold’s Model led to the discovery of ?Atom
38Sea shell looks golden due to _____.Diffraction
39Spectacles used for viewing 3D films have?Polaroids
40Static friction is due to _____?Adhesion, light chemical attraction between two surfaces
41Sun’s heat reaches Earth by ______.Radiation
42Tesla is the unit of which quantity?Magnetic Field
43The atmospheric air is held to the earth byGravity
44The green colour of Leaves is due to what?Because their cells contain chloroplasts which have the pigment chlorophyll
45The potential difference which develops between the electrode and electrolyte is called _____.Electrode Potential
46The power of concave lens is ______.Negative
47The power of electric circuit is measured with a ________.Wattmeter
48The speed of sound in air is approximately equal to _____.330 m/sec
49The twinkling of stars is due to?Because of turbulence in the atmosphere of the Earth
50Two bodies of Mass M1 & M2 have force of attraction, which is inversely proportional to what?The square of the distance between their centers
51Unit of frequency?Hertz
52What causes an object to fall?Gravity
53What colour will a red glass appear if it is heated in dark room?Green
54What does an Anemometer measure?Wind Speed
55What does the blades of a windmill possess so that they are moved by fast wind?Potential Energy
56What happens in an oxidation reaction?Electrons are lost
57What happens to the surface tension of water when detergent is added to it?It decreases
58What is an end to end connection of a resistor called?Series Circuit
59What is found in frequency modulation?Fixed Frequency
60What is the escape velocity of Moon?2.38 Km/s
61What is the formula for Time Period?1/Frequency
62What is the minimum distance for echo to be heard?343 m
63What is the reason for stars not visible in the sky in the daytime?Glare of sunlight
64What is the SI unit of Current?Ampere
65What is the SI unit of frequency of sound?Hertz
66What is the SI unit of Power?Watt
67What is the SI unit of Pressure?Pascal (Pa)
68What is the SI unit of Weight?Newton
69What is the SI unit of Young’s modulus of elasticity?Pascal
70What is the symbol of wavelength?Lambda” (λ)
71What is the unit of impulse?Newton-second
72What is the unit of work?Joule
73What is the work done if there is a charge of 2 coloumb and there is a potential difference of 12 volt?24 joule
74What Principle is used to design ships and submarines?Archimedes Principle
75What will be the attraction force (F) between 2 masses if the mass gets doubled?Force of gravity between them will be quadrupled
76What will be the effect on kinetic energy if any metal is heated?It increases
77What will be the frequency of a wave if the time is 0.2 second?5 Hz
78What’s the Escape Velocity on Earth?25,000 miles per hour
79What’s the property which is there in light waves but not in sound waves?Polarisation
80What’s the SI Unit of Work?joule
81What’s the unit of wave velocity?meters per second
82What’s the difference between centrifugal force & centripetal force?Direction
83What’s the distance between pole & focus called?Focal Length
84What’s the lens formula?1/v – 1/u = 1/f
85What’s the purpose of Hydrometer?It’s used to measure the specific gravity (or relative density) of liquids
86What’s the SI unit of specific heat?joule per kilogram Kelvin
87What’s the SI unit of velocity?meter per second
88What’s the unit of wavelength?Angstrom (Å)
89What’s the use of ECG?Records the electrical activity of your heart at rest
90When three resistors each having resistance, ‘r’ are connected in parallel, their resultant resistance is x. If these three resistances are connected in a series, the total resistance will be _______.9x
91Which current is measured by Ammeter?Electric Current
92Which instrument is used to measure altitudes in aircrafts?Altimeter
93Which instrument is used to measure depth of ocean ?Fathometer
94Which law describes the relationship between the angles of incidence and refraction?Snell’s Law
95Which law states that a body continues to maintain its state of rest or of uniform motion unless acted upon by an external force?Newton’s First Law
96Which layer of the earth’s atmosphere reflect the radio waves to the earth’s surface?Ionosphere
97Which lens can correct Astigmatism?Cylindrical Lenses
98Which lens is present in the human eye?Convex Lens
99Which was the first Super Computer of the world?CDC 6600
100Who invented the Electroscope?William Gilbert

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100 Important Chemistry Questions – RRB NTPC 2019-20


S. No.
QuestionAnswer
1Name the chemical name of K2SO4Potassium Sulfate
2What is the chemical formula of C3H8?Propane
3Name the property of the metals by which it can be made into thin wires?Ductility
4Most electro-negative elementFluorine
5Symbol of PhosphorusP
6Dry ice is the solid form of which gas?Carbon Dioxide
7Which is the most hardest metal?Tungsten
8Nature of ToothpasteBasic
9Methnoic Acid is also known as?Formic Acid
10Generally which type of bonds are the strongest?Ionic Bond
11Which of the given options has maximum vitamin C? (Options: Apple, Guava, Berries, All of the above; Answer: Guava)Guava
12What is electron affinity?The neutral atom’s likelihood of gaining an electron
13Who came up with the Modern Periodic Table?Dmitri Mendeleev
14Which ion helps clotting of blood?Calcium
15What’s the nature of oxides of non-metals?Non-metals react with oxygen in the air to produce non-metal oxides.
16Which of the below isn’t a blood group?Anything apart from the below will be the answer (A+), (A-), (B+), (B-), (O+), (O-), (AB+) & (AB-)
17Constitution of India is kept under which gas?Helium
18Which group is called Halogen?Group 17
19What converts blue litmus into red?Acid
20What’s the chemical formula of Benzene?C6H6
21What is Hydrogen? (Options: Metal, Non-metal, Metalloid, None of the above)Non-metal
22What decreases when going from up to down in a group?The chemical reactivity of metals
23Which of the element is the first metalloid in the table?Boron
24What’s the alternate name of Planetary Model?Rutherford Model
25What is the Olfactory Indicator?A substance whose smell varies depending on whether it is mixed with an acidic or basic solution
26What acid is present in ants?Formic Acid
27Which metal remains liquid at the room temperature?Mercury
28What makes quick lime water milky?Calcium Hydroxide
29Which acid is there in sour milk?Lactic Acid
30Fluorine, Chlorine and Bromine are in which group?Group 17
31Beryllium’s properties match with _____?Magnesium/ Aluminium
32What’s the formula for plaster of paris?CaSO4.1/2H2O
33What’s the colour of iodine vapour on sublimation?Purple
34Valence Shell is _____?The outermost shell of an atom containing the valence electrons.
35Which is the 1st element in Mendeleev’s Periodic Table?Hydrogen
36What is the Modern Periodic Table arrangement based on?Atomic Number
37When going down in a group in the periodic table, which property doesn’t change?Nature of oxide of elements
38Which element is maximum in human body?Oxygen
39The 17th group in the Periodic Table is which category?Halogens
40What’s the atomic number of Phosphorus?15
41What should be balanced in chemical balancing?Atoms
42What’s the unit of carbon credit?Ton
43Ethanol is found in _____?Paints, tinctures, markers, and personal care products such as mouthwashes, perfumes and deodorants.
44What does LPG contain?Propane and Butane
45The concentrated acid is neutralized by which solvent?Water
46Going from top to bottom in a periodic table, what will happen with the atomic size?The Atomic Size Increases
47Going from top to bottom in a group, what will happen with the metallic character?The Metallic Character will increase
48Na, Mg, Al, Si, P, Cl belong to which period?Third Period
49How many neutrons are there in Sodium?12
50Who discovered Neutron?James Chadwick
51What’s the source of solar energy?The Sun
52Which kind of bond does graphite have?Covalent Bond
54What causes a perfume to travel to our nose?Diffusion
55Elements in the first group of the Periodic Table are also known as?Alkali metals
56Which element has the highest ionization energy?Helium
57Atomic number of elements define which of the following?Number of protons and electrons
58How many atoms are present in Ozone?3
59What is the atomic number of Silver?47
60What is the formula of Borax?Na2[B4O5(OH)4]·8H2O
61What is the Formula of Chloroform?CHCl3
62What is the molecule formula of Propane?C3H8 or CH3CH2CH2
63What is the IUPAC name of C3H8?Propane
64Name the metalloid which has the highest atomic number?Tennessine
65Which gas is used to prevent Oxidisation?Nitrogen Gas
66Which is the best conductor of electricity?Silver
67Oxidation means loss of?Hydrogen
68Fe + CuSO4 → FeSO4 + Cu is an example of Combustion, Oxidation or Displacement Reaction?Displacement Reaction
69How many neutrons are there in Deuterium?1
70The pH value of blood is?7.35 to 7.45
71What is needed to make soda water?Carbon dioxide
72What is the chemical formula of Calcium Hydroxide?Ca(OH)2
73What is the chemical formula of detergent?C17H35COONa
74What is the heaviest metal?Osmium
75Who invented the Atom Bomb?J. Robert Oppenheimer
76Why does Silver turn black?because of hydrogen sulfide (sulfur)
77Which substance enhances the rate of reaction without reacting with the product?Catalyst
78What’s the valency of nitrogen in NH3?3
79If metal & an acid reacts, which gas is released?Hydrogen
80When litmus is added to the solution of borax it turns?Blue
81Litmus solution will be the most acidic in which of the following? Lime, Grapes, Mango, BananaLime
82What is the byproduct of soap?Glycerol
83What is the sum of neutrons & protons in an atom is known as?Mass Number
84Where is the hole of Ozone layer?Stratosphere
85Which is the most electronegative element?Fluorine
86The highest amount of citric acid is present in which fruit?Orange
87How many elements are there in the 3rd period of the periodic table?8
88Which is the lightest metal?Lithium
89What’s the formula of ‘Sindoor’?HgS
90What’s the atomic number of Gold?79
91What’s the total number of commonly known metalloids?6
92What is the pH of Wine?3.3 to 3.6
93What is the formula of Baking Soda?NaHCO3
94What is the formula of Benzene?C6H6
95What’s the chemical formula of Washing Soda?Na2CO3
96What metal is used to manufacture aeroplane?Aluminium
97An azo dye is formed by interaction of an aromatic diazonium chloride with?Phenol
98In Moseley’s periodic table elements are arranged according toAtomic Number
99Teflon is the common name ofPolytetrafluoroethene
100Which of the following elements has the lowest melting point? (Options: Zinc, Titanium, Sulphur & Fluorine)Fluorine

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100 Important Biology Questions – RRB NTPC 2019-20

S. No.QuestionAnswer
1.Use of disposable syringes is usually advised to prevent?AIDS
2DNA stands forDeoxyribonucleic Acid
3Blood groups was discovered by –Karl Landsteiner
4Dermatology is the study of?Human Skin
5An emergency hormone is known asAdrenaline
6The smallest bone in the human bodyStapes
7Which hormone control glucose levels in the body?Insulin
8Which part of eye is responsible for its colour?Iris
9What’s the name of tuberculosis’ vaccination?Bacille Calmette-Guérin (BCG)
10Which is the strongest bone in the human body?Femur
11Who gave the theory of evolution?Charles Darwin
12Plants which don’t have a differentiated plant body belong to which group?Thallophyta
13What joins one bone to another boneLigaments
14What’s the liquid part of blood known as?Plasma
15Which of the below has teeth?Mosquito
16Pupil is a part of which organ in the human body?Eye
17Which lens does Human eye have?Convex lens
18What is the primary sex hormone in men?Testosterone
19Jaundice disease affects which part of the human body?Liver
20What is the shape of Bacillus Bacteria?Rod-shaped
21The largest vein in the human body Vena cava
22Which of the following is not a sensory organ?Brain
23Glucose is aMonosaccharide
24Upper most layer of skin is called?Epidermis
25Number of bones a human skull has22
26Alcoholic drink containsEthyl Alcohol
27Genes are made byPolynucleotides
28Leoprasy is also known asHansen’s disease
29Endocrine glands are also known asDuctless Glands
30What are Bryophytes?Amphibious Plants
31What are Purkinje fibres associated with?Heart
32What will be the outcome when fructose is combined with glucose?Sucrose
33Deficiency of Vitamin C leads toScurvy
34Which is the strongest muscle of the human body?Masseter muscle
35The study of the chemical reactions required for life to exist and function, usually a focus on the cellular levelBiochemistry
36Transferrins are glycoproteins that control the level of what in biological fluids.?Free Iron
37Which blood group is the universal donor?O-
38Which disease is caused by the deficiency of Vitamin B1?Beriberi
39Cancer affects which part of the Bone marrow?Multiple myeloma
40Which is the smallest gland in the human body?Pineal gland
41Who is the father of Genetics?Gregor Mendel
42What is the normal fetal heart rate?110 to 160 bpm
43What’s the study of fungi?Mycology
44Who gave the theory of ‘Survival of the Fittest’?Herbert Spencer
45Where is the Thyroid gland located in the Human body?Neck
46Which among the following organs contributes to maintaining the balance of body?Ear
47Which chromosome is responsible for a baby boy?Y
48What is known as ‘Suicidal bags of cell’?Lysosome
49What is the PH value of milk?6.5
50The study of Trees is called?Dendrology
51Which among the following lens is used to correct Presbyopia?Bifocal lens
52The oral polio vaccine was discovered byAlbert Sabin
53Which creatures breathes through its skin?amphibians
54What are the products formed during photosynthesis?Glucose and Oxygen
55Food poisoning is caused byClostrideam boutulium
56Which is the largest gland in the human bodyLiver
57What is the smallest functional unit of a kidney?Nephron
58Our bones and teeth are generally made ofTricalcium phosphate
59What is the normal BP of human body?120/80
60Which is a broad-spectrum antibioticAmpicillin
61Deficiency of Iodine leads toGoitre
62Antihistamines are used to treat?Allergies
63Which vitamin helps in clotting of bloodVitamin K
64In which form of blood cancer, white blood cells multiply abnormally and circulate through the bloodLeukemia
65What connects muscles to bones?Tendons
66What kind of disease is ring worm?Fungal infection
67DNA is organized into dense protein-DNA complexes calledChromosomes
68A blood disorder in which the body makes an abnormal form or Inadequate amount of haemoglobinThalassemia
69Vitamin A deficiency causesNight Blindness
70What is the master gland in the human body?Pituitary gland
71What is the main storage site of calcium in the body?Bones
72What substance are nails made of?Keratin
73What is the molecular shape of a DNA molecule?Double helix
74Brain contains microscopic cells calledNeurons
75Most common blood disorder in humans Anemia
76White blood cells are also called asLeukocytes
77What kind of blood is carried through artery?Oxygenated blood
78Which hormone made by pancreas regulates the amount of glucose in the bloodInsulin
79Which layer of the skin contain sweat glandsDermis
80Most complex organ in the human body isBrain
81Name the soft, spongy tissue found in the centre of bonesBone Marrow
82Deficiency of Vitamin D causesRickets
83The branch of biology concerned with the study of the structure of organisms and their parts.Anatomy
84Dental cavities are caused because of the deficiency of?Fluorine
85The two holes in your nose are called?Nostrils
86The pollination by snails is calledMalacophily
87How many vertebrae are there in the human body?33
88The word gene was firstly used byWilhelm Johannsen
89The study of the geographical distribution of living thingsBiogeography
90Which metal is present in hemoglobin?Iron
91The study of fossils is calledPaleontology
92System that Influences the function of the body using hormonesEndocrine system
93The organ of the human body which stores the carbohydrates in the form of glycogen isLiver
94The PH value of human blood is?7.40
95Area of the brain which controls the movements of the musclesCerebral cortex 
96Which disease causes legs to swell?Elephantiasis
97Our skeletal system consists of how many bones?206
98The largest artery in the human bodyAorta
99The study of cognition is calledCognitive biology
100Deficiency of iodine leads toEnlargement of Thyroid Gland

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Download Free 100 Important Physics, Chemistry, Biology Questions PDF

We hope that the above compilation of Physics, Chemistry and Biology questions will be useful in your preparation.

RRB NTPC 2019-20 – Preparation for General & Life Sciences

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