General Science Multiple Choice Questions


General Science Multiple Choice Questions

1) What is the PH of H2O?
6
7
8
9 



Answer: (b) 7

Explanation: H2O is the chemical formula of water. The water is neither acid nor base. Water is only neutral. This category belongs to pH 7. Therefore, the pH of water is 7.

2) Which of the following gas is reduced in the reduction process?
Oxygen
Helium
Carbon
Hydrogen 



Answer: (d) Hydrogen

Explanation: In the reduction process, oxygen is added, and hydrogen is reduced from the reactant.

3) Which of the following compound is mainly used in hand sanitizer?
Aldehyde
Acetic acid
Alcohol
Ketone 



Answer: (c) Alcohol

Explanation: Alcohol is mainly used in hand sanitizers. It kills germs present on our hands or any other places by rendering their oxygen supply.

4) What is the S.I unit of frequency?
Diopter
Second
Hertz
Meter 



Answer: (c) Hertz

Explanation: The frequency is equal to the number of cycles per unit time, so its S.I unit is s-1 which is equal to hertz. Therefore, the S.I unit of frequency is hertz.

5) Acid turns blue litmus paper into which color?
Black
Blue
Red
Orange 



Answer: (c) Red

Explanation: The acid turns blue litmus paper into red litmus paper, and the base turns red litmus paper into blue litmus paper.

6) Which of the following enzymes is not present in the human stomach?
Pepsin
Hydrochloric acid
Mucus
Trypsin 



Answer: (d) Trypsin

Explanation: There are three enzymes present in our stomach pepsin, hydrochloric acid, mucus. Trypsin is present in the small intestine. So, option (d) is the correct answer.

7) Which of the following gland is present in the human mouth?
Adrenal
Pituitary
Gonads
Salivary 



Answer: (d) Salivary

Explanation: The salivary gland is present in the human mouth, which secretes saliva to excrete fat present in human foods.

8) Name the gland which is present above our kidneys?
Adrenal
Pituitary
Gonads
Salivary 



Answer: (a) Adrenal

Explanation: Adrenal gland is present above our kidneys. It controls our blood pressure. It also controls changes that occur in our body during the angry and happy mood.

9) What is the basic unit of our neural system?
Neutron
Neuron
Nephron
Nucleon 



Answer: (b)

Explanation: The basic unit of our neural system is the neuron. It connects our brain to all parts of our body.

10) What is the basic unit of our excretory system?
Neutron
Neuron
Nephron
Nucleon 



Answer: (c) Nephron

Explanation: The basic unit of the excretory system is the nephron. It helps filter blood through urea. It is connected to human's arteries and veins.

11) What is the unit of wavelength?
Hertz
Diopter
Faraday
Meter 



Answer: (d) Meter

Explanation: The wavelength is the distance between two consecutive waves. The distance is measured in meters, centimeters, or nanometers. Therefore, the unit of wavelength is meter, centimeter, or nanometer.

12) What is the frequency range of white light?
4 * 1014 to 8 * 1014
4 * 1014 to 9 * 1014
5 * 1014 to 8 * 1014
5 * 1014 to 9 * 1014 



Answer: (a) 4 * 1014 to 8 * 1014

Explanation: White light has seven colors which are violet, indigo, blue, green, yellow, orange, red. There is a range of frequency of white light, and its frequency range is 4 * 1014 to 8 * 1014.

13) What is the color of AgBr?
Blue
Brown
White
yellow 



Answer: (d) yellow

Explanation: The AgBr is the chemical formula of the silver bromide. The color of AgBr is yellow.

14) What is the other name of Newton's first law of motion?
Action-reaction
Change in momentum
Law of inertia
Constant momentum 



Answer: (c) Law of inertia

Explanation: Newton's first law of motion is also known as the law of inertia. It states that everyone remains in their previous position.

15) According to newton's second law of motion, change in momentum per unit time is equal to ________.
Force
Energy
Acceleration
Work 



Answer: (a) Force

Explanation: According to newton's second law of motion, change in momentum per unit time is equal to force applied on that body. Therefore, option (a) is the correct answer.

16) What is the color of SO2 gas?
Blue
Grey
Colorless
Brown 



Answer: (c) Colorless

Explanation: SO2 is the chemical formula of sulfur dioxide. The color of SO2 gas is colorless. It gives a pungent smell. Therefore, if we want to recognize the presence of SO2 gas, we smell it.

17) What is the color of CuSO4?
Blue
Brown
Orange
White 



Answer: (d) White

Explanation: CuSO4 is the chemical formula of copper sulphate, and its color is white.

18) What is the S.I unit of electric charge?
Coulomb
Ampere
Faraday
Ohm 



Answer: (a) Coulomb

Explanation: The S.I unit of electric charge is the coulomb.

19) How many carbon atoms are present in heptane?
6
7
8
5 



Answer: (b) 7

Explanation: Heptane is a hydrocarbon chain that has seven carbon atoms. Therefore, option (b) is the correct answer.

20) What is the chemical formula of benzene?
C6H6
C6H4
C8H6
C6H8 



Answer: (a) C6H6

Explanation: Benzene is a cyclic hydrocarbon chain. It has 6 carbon atoms which are alternatively connected with a double bond. Therefore, the chemical formula of benzene is C6H6.

21) What is the atomic number of phosphorus?
12
13
14
15 



Answer: (d) 15

Explanation: The atomic number of phosphorus is 15. It belongs to the 15th group and the 3rd period in the periodic table.

22) Which of the following quantity increases in a group when we move from top to bottom?
Valency
Electronegativity
Atomic size
Ionization energy 



Answer: (c) Atomic size

Explanation: When we move from top to bottom in the periodic table, the number of shells increases, which increases the size of the atom.

23) What is the PH range of acids?
0 - 7
7 - 14
1 - 7
7 - 15 



Answer: (a) 0 - 7

Explanation: The total range of the PH scale is 0 to 14, in which the pH range of acids is 0 to 7.

24) Name the non-metals which have high melting and boiling point?
Gallium
Diamond
Cesium
Lead 



Answer: (b) Diamond

Explanation: Diamond is a non-metal but still has high melting and boiling point due to its covalent structure. In these options, all other options are metals. Therefore, option (b) is the correct answer.

25) Name the metal which is most ductile?
Gold
Silver
Copper
Iron 



Answer: (a) Gold

Explanation: Gold and platinum are the most ductile metal. Ductility is the property of any element by which it can modify into a wire.

26) What is the S.I unit of current?
Coulomb
Ampere
Ohm
Volt 



Answer: (b) Ampere

Explanation: The S.I unit of charge is ampere. One ampere is equal to the amount of current flowing across a unit length wire.

27) What is the S.I unit of potential difference?
Volt
Ampere
Coulomb
Ohm 



Answer: (a) Volt

Explanation: The S.I unit of potential difference is volt. One volt is equal to the potential difference across a wire having 1-ampere current apply 1-ohm resistance.

28) Name the veins that carry oxygenated blood from the heart to other parts of the body?
Kidney
Arteries
Both (a) and (b)
None of the these 



Answer: (b) Arteries

Explanation: The arteries are attached to the heart. They carry oxygen-rich blood from the heart to other parts of the body.

29) Name the part of the body on which coronavirus affects the most?
Heart
Liver
Kidney
Lungs 



Answer: (d) Lungs

Explanation: The coronavirus has the most impact on human lungs. It causes difficulty in breathing and is harmful to health.

30) Name the part of the eye on which image is formed?
Cornea
Lens
Optical nerves
Brain 



Answer: (a) Cornea

Explanation: The part of the eye on which the image is formed is the cornea. Image is focused by the lens on the cornea, which sends it to the brain through optical nerves.

31) Which of the following diseases is caused by dog bites?
Scurvy
Madness
Rabies
Colorblindness 



Answer: (c) Rabies

Explanation: Rabies is the name of the disease caused by dog bites. In this disease, the person loses his ability to think and understand.

32) Which device is used for measuring air pressure?
Ammeter
Voltmeter
Seismograph
Barometer 



Answer: (d) Barometer

Explanation: The barometer is used for measuring air pressure. It is also called barometric pressure. It measures pressure in bar unit.

33) What is the basic principle of an electric generator?
Law of constant momentum
Flaming left-hand rule
Ohm's law 



Answer: (a) Magnetic induction

Explanation: The basic principle of the electric generator is magnetic induction. It is given by faraday.

34) What is the S.I unit of lens power?
Joule
Calorie
Diopter
Hertz 



Answer: (c) Diopter

Explanation: The S.I unit of lens power is a diopter. It is equal to the reciprocal of the focal length of the lens. P = 1/F.

35) What is the S.I unit of resistance?
Coulomb
Ohm
Volt
Ampere 



Answer: (b) Ohm

Explanation: The S.I unit of resistance is the ohm. If we apply 1 unit voltage in a wire and it gives 1-ampere current, then resistance across this wire is 1 ohm.

36) What is the chemical formula of alcohol?
C2H5OH
C2H5
C2H5COOH
C2H5O 



Answer: (a) C2H5OH

Explanation: The chemical formula of alcohol is C2H5OH. It is ethane with an alcohol group. It is also called ethanol.

37) What is the name of juice secreted from the gall bladder?
Saliva
Hydrochloric acid
Bile juice
Maltase 



Answer: (c) Bile juice

Explanation: Bile juice is secreted from the gall bladder. It is basic in nature. It helps neutralize acidic food.

38) What is the scientific name of humans?
Mangifera indica
Rana tigrina
Homo sapiens
Homo species 



Answer: (c) Homo sapiens

Explanation: The scientific name of humans is homo sapiens.

39) What is the scientific name of frog?
Anura
Homo sapiens
Felis catus
Mangifera indica 



Answer: (a) Anura

Explanation: The scientific name of the frog is Anura.

40) What is the name of farming in which the domestication of hens is involved?
Pisci culture
Apiculture
Poultry culture
None of the these 



Answer: (c) Poultry culture

Explanation: Poultry culture is the farming of hens. It is used for producing eggs. Pisci culture is the farming of fishes. Apiculture is the farming of bees.

41) Who discovered the x-rays?
Maxwell
Wilhelm roentgen
Faraday
Hertz 



Answer: (b) Wilhelm roentgen

Explanation: Wilhelm roentgen discovered the x-ray in 1895. X-ray is used in human body scanning.

42) Who discovered the radioactivity?
Madam curie
Henri Becquerel
Faraday
Hertz 



Answer: (b) Henri Becquerel

Explanation: Henri Becquerel discovered the radioactivity.

43) Name the process by which the human breathes?
Photosynthesis
Digestion
Excretion
Respiration 



Answer: (d) Respiration

Explanation: Respiration is the process by which a person breathes. In this process, oxygen is taken in, and carbon dioxide is taken out.

44) Name the part of the human body in which most of the digestion occurs?
Stomach
Small intestine
Large intestine
Mouth 



Answer: (b) Small intestine

Explanation: The small intestine is the organ of the human body where complete digestion of food like carbohydrates, proteins, and fats takes place.

45) Name the metal which is easily cut by a simple knife?
Sodium
Lead
Tin
Mercury 



Answer: (a) Sodium

Explanation: Sodium is a metal that is easily cut by a simple knife. Sodium is an alkali metal that belongs to the first group.

46) Name the fabric which is used in making bulletproof jackets?
Iron
Aluminum
Steel
Kevlar 



Answer: (d) Kevlar

Explanation: Kevlar is used in making bulletproof jackets.

Kevlar is a resistor of heat. It is a strong fabric, so it is used in bulletproof jackets.

47) What is the S.I unit of force?
Newton
Bar
Joule
Newton meter. 



Answer: (a) Newton

Explanation: Force is equal to mass into acceleration. The S.I unit of mass is the kilogram, and the S.I unit of acceleration is ms2. So, the S.I unit of force is kgms2 which is equal to Newton. Hence the S.I unit of force is Newton.

48) What is the scientific name of a mango?
Mangifera indica
Rana tigrina
Homo sapiens
Felis catus 



Answer: (a) Mangifera indica

Explanation: The scientific name of mango is Mangifera indica.

49) Who is the main producer of our ecosystem?
Humans
Plant
Animals
Bacteria 



Answer: (b) Plant

Explanation: Plants use the sun's energy for producing their food. So, they are the primary producer of our ecosystem.


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