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Chemistry Entry Tests Most Repeated MCQs With Answers

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 If you have applied for jobs or entry tests in Chemistry Subject you will learn here online solved objective type question answers of Chemistry. All of these Chemistry MCQs are helpful for upcoming jobs tests. Learn these MCQs for your exams and tests of PPSC, FPSC, CSS, PMS, NTS, PTS, OTS, CTS, SPSC, BPSC, KPPSC and other entrance exams.

Chemistry MCQs

In Medical and Engineering Colleges and Universities chemistry in the Major Subject for MCAT, ECAT exams. Most repeated and mostly asked Chemistry Question answers learn with easy quiz tests. most important more then 100 Chemistry MCQs Objective Type Question Answers.


Chemistry Most Important Question Answers MCQs

Q.1: Each day human body breathe in ------- liters of air?
  1. 5,000 to 10,000
  2. 10,000 to 15,000
  3. 15,000 to 20,000
  4. 20,000 to 25,000
C
Q.2: The most abundant element in the universe is?
  1. Hydrogen
  2. Oxygen
  3. Carbon dioxide
  4. Silicon
A
Q.3: The substance which increases the rate of chemical reaction is?
  1. Metal
  2. Catalyst
  3. Alloy
  4. Enzymes
B
Q.4: The average human body contains about ------- gram of Sodium Chloride?
  1. 190
  2. 210
  3. 230
  4. 250
D
Q.5: pH is an abbreviation for?
  1. Power of Hydrogen
  2. Possibility of Hydrogen
  3. Population of Hydrogen
  4. Position of Hydrogen
A
Q.6: The best soil pH value for most crops and plants is?
  1. 4.5
  2. 5.5
  3. 6.5
  4. 7.5
C
Q.7: ---------- are biological catalysts?
  1. Enzymes
  2. Minerals
  3. Proteins
  4. Vitamins
A
Q.8: The most abundant constituent in Air is?
  1. Oxygen
  2. Hydrogen
  3. Carbondioxide
  4. Nitrogen
D
Q.9: Isotopes are atoms of the same element with different numbers of?
  1. Protons
  2. Electrons
  3. Neutrons
  4. Positron
C
Q.10: Over ---------- of the elements in the Periodic Table are Metals?
  1. 60%
  2. 65%
  3. 70%
  4. 75%
D
Q.11: Those substances which give hydroxyl ions in water are called?
  1. Acid
  2. Base
  3. Salts
  4. Alkalies
B
Q.12: Those substances which give hydrogen ions in water are called?
  1. Base
  2. Salts
  3. Neutral
  4. Acid
D
Q.13: KHSO4 is a ?
  1. Base
  2. Acid
  3. Neutral
  4. Salt
B
Q.14: Neutral solution has pH value of?
  1. 3
  2. 5
  3. 7
  4. 14
C
Q.15: According to Bronsted, Acids are?
  1. Proton accepter
  2. Electron donor
  3. Proton donor
  4. Electron accepter
C
Q.16: NH3 is a/an?
  1. Acid
  2. Base
  3. Salts
  4. Neutral
B
Q.17: Salts are?
  1. Acid
  2. Base
  3. Alkalies
  4. Neutral
D
Q.18: Organic compounds are originated from ?
  1. Air
  2. Sun
  3. Rocks
  4. Living organisms
D
Q.19: -----------are insoluble in water?
  1. Alkanes
  2. Sugars
  3. Salts
  4. Starch
A
Q.20: Poly Hydroxyl compounds of Aldehyde and ketones are called ?
  1. Carbohydrates
  2. Protein
  3. Lipids
  4. Vitamin
A
Q.21: Wheat, rice, and honey are the sources of?
  1. Lipids
  2. Proteins
  3. Vitamin
  4. Carbohydrates
D
Q.22: Polymers of amino acids are called?
  1. Vitamin
  2. Proteins
  3. Lipids
  4. Maltose
B
Q.23: Nucleic acids are of --------types?
  1. Two
  2. Three
  3. Four
  4. Five
A
Q.24: The two types of nucleic acids are DNA and?
  1. GNA
  2. RNA
  3. proteins
  4. lipids
B
Q.25: Fats and oils are example of ?
  1. Proteins
  2. Vitamin
  3. Lipids
  4. Carbohydrates
C
Q.26: The major component of troposphere is?
  1. Argon
  2. Carbon
  3. Hydrogen
  4. Nitrogen
D
Q.27: Ozone depletion causes?
  1. Blood Cancer
  2. Skin Cancer
  3. Malaria
  4. T.B
B
Q.28: The pH of the acid rains is less than?
  1. 5.6
  2. 5.1
  3. 4.6
  4. 4.1
A
Q.29: Ozone is a ------------ gas?
  1. Reddish
  2. Greenish
  3. Bluish
  4. Yellowish
C
Q.30: In water, ratio of oxygen and hydrogen by mass is?
  1. 1:3
  2. 2:1
  3. 1:2
  4. 8:1
D
Q.31: The pH of a neutral solution is?
  1. 5
  2. 7
  3. 10
  4. 14
B
Q.32: The pH of an acidic solution is ----- 7?
  1. less than
  2. greater than
  3. equal to
  5. and
A
Q.33: The branch of chemistry in which we study hydrocarbon and their derivatives is called?
  1. Organic chemistry
  2. Inorganic chemistry
  3. Industrial chemistry
  4. Biochemistry
A
Q.34: The metal present in combined state is called?
  1. solid
  2. compound
  3. mineral
  4. None of these
C
Q.35: Which of the following is homogeneous mixture?
  1. Smoke
  2. Fog
  3. Smog
  4. Air
D
Q.36: The atomic number of Hydrogen is?
  1. 1
  2. 2
  3. 8
  4. 16
A
Q.37: Electron in its ground state does not?
  1. spin
  2. revolve
  3. reside in orbit
  4. radiate energy
D
Q.38: The number of periods in modern periodic table is?
  1. 5
  2. 6
  3. 7
  4. 8
C
Q.39: Which of the following is a transition element?
  1. Cu
  2. Cl
  3. S
  4. B
A
Q.40: Ink spreads in water because of?
  1. Vapor pressure
  2. Diffusion
  3. Dipole movement
  4. Osmosis
B
Q.41: The blister form of copper is the --------- form?
  1. Impure
  2. Raw
  3. Pure
  4. Refined
A
Q.42: Vitamin A is soluble in?
  1. Water
  2. Fats
  3. Both A And B
  4. None of these
B
Q.43: Vitamin B is soluble in?
  1. Water
  2. Fats
  3. Both A And B
  4. None of these
A
Q.44: The atomic number of an element is the number of ----- in the ----- of an atom?
  1. electrons, first shell
  2. electrons, last shell
  3. neutrons, nucleus
  4. protons, nucleus
D
Q.45: An element is a substance whose atoms all have the same?
  1. neutrons
  2. electrons
  3. atomic number
  4. mass number
C
Q.46: Mutation is a sudden chemical change in?
  1. DNA
  2. RNA
  3. Cell
  4. Cell wall
A
Q.47: Amino acids are the building blocks of?
  1. Fats
  2. Vitamins
  3. Proteins
  4. Lipids
C
Q.48: Organic chemistry is the study of?
  1. Carbon
  2. Metal
  3. Oxygen
  4. Carbon and its compounds
D
Q.49: Enzymes are made of?
  1. Proteins
  2. Lipids
  3. Fats
  4. Minerals
A
Q.50: Acidic rain is caused by?
  1. Nitrogen oxide
  2. Sulfur Dioxide
  3. Carbonic Acid
  4. Both
  5. and
D
Q.51: Lower the pH value, --------- will be an acid?
  1. weaker
  2. neutral
  3. stronger
  4. none of these
C
Q.52: Which of the following is an organic compound ?
  1. CO
  2. C2H2
  3. CO2
  4. NaHCO3
B
Q.53: Which one of the following is the general formula of alkenes?
  1. CnH2n
  2. CnH2n–1
  3. CnH2n+1
  4. CnHn
B
Q.54: The Homologues has the same?
  1. density
  2. state
  3. chemical properties
  4. colour
C
Q.55: Carbon atom usually?
  1. gains four electron
  2. loses four electrons
  3. ionizes
  4. forms four covalent bonds
D
Q.56: Organic radical with general formula CnH2n+1 is?
  1. Allyl
  2. Alkyl
  3. Pheny
  4. Benzyl
B
Q.57: The next homologue of C8H18 is?
  1. C9H20
  2. C9H18
  3. C8H16
  4. C7H14
A
Q.58: Methane is the first member of?
  1. Alcohol Series
  2. Carboxylic acids Series
  3. Alkane Series
  4. Alkene Series
C
Q.59: The compound C3H8 (Propane) must have?
  1. An ionic bond
  2. At least one triple bond
  3. All single bonds
  4. At least one double bond
C
Q.60: The name of C6H14 is ?
  1. Hexane
  2. Decane
  3. Propane
  4. Heptanes
A
Q.61: Which of the following organic compound has different chemical properties?
  1. C2H5COOH
  2. CH3OH
  3. C5H11OH
  4. C2H5OH
A
Q.62: Which of the following is inorganic?
  1. NaCN
  2. CH3CL
  3. CH4
  4. CH3OH
A
Q.63: Dehydration of ethanol with concentrated sulfuric acid results in the formation of?
  1. Methane
  2. Ethene
  3. Ethane
  4. Acetylene
B
Q.64: Which one of the following reagents distinguished ethene from acetylene?
  1. Bromine solution
  2. AgNO3
  3. Alcoholic KOH
  4. Carbon tetrachloride solution
B
Q.65: Which one of the following decolonizes Br2 Water?
  1. MethaneEthene
  2. Propane
  3. Ethane
  4. Ethene
D
Q.66: When ethene reacts with HBr, the compound formed is?
  1. Br-CH2-CH2-Br
  2. CH3-CH2-Br
  3. Acetylene
  4. CH3-CH2-CH3
B
Q.67: Which of the following statement is not true for alkynes?
  1. They do not perform Baeyer’s Test
  2. They undergo addition reaction
  3. They burn to form CO2
  4. They contain a triple bond
A
Q.68: All the member of alkane series has?
  1. All types of bonds
  2. All single bonds
  3. At least one double bond
  4. At least one triple bond
B
Q.69: Baeyer’s reagent is?
  1. Acidic KMnO4
  2. Hot KMnO4
  3. Concentrated KMnO4
  4. Alkaline KMnO4
D
Q.70: Which one gives carboxylic acid with alkaline KMnO4 ?
  1. Ethane
  2. Ethene
  3. Acetylene
  4. Methane
C
Q.71: Which one gives a mixture of hydrocarbons on halogenations ?
  1. Ethane
  2. Ethyl alcohol
  3. Ethene
  4. Ethyne
D
Q.72: Baeyer’s test shows the presence of ?
  1. A double bond
  2. A triple bond
  3. Both A and B
  4. No bond
C
Q.73: Which one is the least reactive ?
  1. Propane
  2. Ethene
  3. Ethyne
  4. Ethane
D
Q.74: Ethane reacts with chlorine in the presence of ?
  1. Sunlight
  2. Water
  3. Carbon tetra chloride
  4. Ether
A
Q.75: ----------- is a factor related to blood clotting?
  1. Vitamin A
  2. Vitamin K
  3. Vitamin C
  4. Vitamin E
B
Q.76: The coldest region of the Earth’s atmosphere is?
  1. Mesopause
  2. Stratosphere
  3. Tropopause
  4. Stratopause
A
Q.77: The melting point of water is -------- degree Celsius?
  1. 0
  2. 1
  3. 2
  4. 100
A
Q.78: The total volume of water present on the Earth surface is?
  1. 1.386 km3
  2. 1.386 million km3
  3. 1.386 billion km3
  4. 1.386 trillion km3
C
Q.79: The vital function of protoplasm is due to the presence of?
  1. calcium
  2. fats
  3. minerals
  4. water
D
Q.80: The quantity of fresh water present on the Earth’s surface is about?
  1. 0.25%
  2. 2.5%
  3. 12.25%
  4. 25.5%
B
Q.81: The reason of unusual physical properties of water is due to the presence of?
  1. Covalent bond
  2. Coordinate covalent Bond
  3. Hydrogen bonding
  4. None of these
C
Q.82: The density of water is one gram per centimeter cube at?
  1. 60 °C
  2. 4 °C
  3. 100 °C
  4. 0 °C
B
Q.83: The enormous quantity of water present on earth surface acts as giant thermostat due to its high?
  1. Density
  2. Boiling Point
  3. Latent heat values
  4. Heat Capacity
D
Q.84: The “latent heat of fusion” of water is?
  1. 4.01 kj/mol
  2. 5.01 kj/mol
  3. 6.01 kj/mol
  4. 7.01 kj/mol
C
Q.85: Dielectric constant of water at 18 °C is?
  1. 80
  2. 90
  3. 100
  4. 110
A
Q.86: Water gas is a mixture of?
  1. Hydrogen and Oxygen
  2. Hydrogen and Carbon monoxide
  3. Water and Air
  4. Steam and Air
B
Q.87: Chlorine act as a bleaching agent in the presence of?
  1. HNO3
  2. NaOH
  3. HCL
  4. H2O
D
Q.88: The chemical formula of magnetic oxide is?
  1. Fe3O4
  2. Fe2O3.H2O
  3. Fe2O3
  4. FeO
A
Q.89: Rain water is acidic in nature because air contains?
  1. Oxygen
  2. Nitrogen
  3. Carbon dioxide
  4. All of these
C
Q.90: Nutrient pollution of water bodies is caused by?
  1. pathogens
  2. acid rain
  3. calcium and magnesium
  4. nitrogen and phosphorus
D
Q.91: Most of the aquatic animals cannot survive above?
  1. 30 °C
  2. 35 °C
  3. 50 °C
  4. 44 °C
A
Q.92: Which one of the following disease is caused by mercury?
  1. Typhoid
  2. Cholera
  3. Hepatitis
  4. Parkinson
D
Q.93: The blister copper is refined by?
  1. Boiling
  2. Concentration
  3. Electrolysis
  4. Reduction
C
Q.94: Chemical formula of Urea is?
  1. NH2CONH2
  2. Na2CO3
  3. NH2COONH4
  4. NH4CL
A
Q.95: Sodium carbonate is commercially manufactured by?
  1. Ostwald’s Process
  2. Haber’s Process
  3. Frisch Process
  4. Solvay Process
D
Q.96: Urea is widely used in fertilizers as a source of?
  1. Biomass
  2. Sulfur
  3. Phosphate
  4. nitrogen
D
Q.97: Petroleum is a mixture of many?
  1. Salt
  2. Hydrocarbons
  3. Hydroxide
  4. Acids
B
Q.98: Raw materials used for manufacturing urea are?
  1. CO2 and NH3
  2. H2 and NH3
  3. HCL and NH3
  4. OH and NH3
A
Q.99: Which one is a step of metallurgical process ?
  1. Rustin
  2. Crystallization
  3. Roasting
  4. None of these
C
Q.100: Different fractions of petroleum are separated by ?
  1. Cooling
  2. Fractional Distillation
  3. Steam distillation
  4. None of these
B
Q.101: The mass number is the total number of ----- and ----- in nucleus of an atom?
  1. protons, neutrons
  2. protons, electrons
  3. neutrons, electrons
  4. electrons, positrons
A
Q.102: Isotopes are atoms whose nucleus have the same number of ----- but different number of -----?
  1. protons, neutrons
  2. protons, electrons
  3. neutrons, electrons
  4. electrons, positrons
A
Q.103: The atomic mass unit (amu) is equal to?
  1. 1.66054×10–15 kg
  2. 1.66054×10–19 kg
  3. 1.66054×10–23 kg
  4. 1.66054×10–27 kg
D
Q.104: Burning of sodium in chlorine produces?
  1. clouds
  2. pencil
  3. salt
  4. smoke
C
Q.105: The molecular formula of surcose (sugar or table sugar) is?
  1. C6H12O6
  2. C12H22O11
  3. C6H12
  4. C12H22
B
Q.106: An electrolyte is a substance that produces ----- solution when dissolved in water?
  1. conducting
  2. nonconducting
  3. poorly conducting
  4. B and C
A
Q.107: A ----- consists of the elements in any one horizontal row of the periodic table?
  1. block
  2. base
  3. group
  4. period
D
Q.108: A ----- consists of the elements in any one column of the periodic table?
  1. block
  2. base
  3. group
  4. period
C
Q.109: One atomic mass unit (amu) is a mass unit equal to exactly one-twelth the mass of a ----- atom?
  1. carbon-8
  2. carbon-12
  3. carbon-16
  4. carbon-20
B
Q.110: Vitamin -------- is also called ascorbic acid?
  1. D
  2. A
  3. E
  4. C
D
Q.111: The first period of elements consists of only?
  1. hydrogen
  2. hydrogen and helium
  3. hydrogen and oxygen
  4. hydrogen and nitrogen
B
Q.112: The elements in any one group have similar?
  1. atomic number
  2. mass number
  3. properties
  4. radioactivity
C
Q.113: The only nonmetal element that exists in liquid form is?
  1. Bromine
  2. Mercury
  3. Calcium
  4. Platinum
A
Q.114: All metallic elements are solid at room temperature except for?
  1. Lithium
  2. Mercury
  3. Calcium
  4. Platinum
B
Q.115: The chemical formula of aluminium oxide is?
  1. Al3O2
  2. Al3O3
  3. Al2O2
  4. Al2O3
D
Q.116: The elements in group 1A are known as?
  1. alkanes
  2. alkenes
  3. alkali metals
  4. halogens
C
Q.117: The elements in group 7A are known as?
  1. alkanes
  2. alkenes
  3. alkali metals
  4. halogens
B
Q.118: A periodic table is showing the element Sodium as below. What is atomic number and mass number of the element sodium?
  1. Atomic Number = 11 and Mass Number = 23
  2. Atomic Number = 23 and Mass Number = 11
  3. Atomic Number = 11 and Electronegativity = 23
  4. Atomic Number = 11 and Valency = 23
A
Q.119: The molecular formula of methanol?
  1. CH2OH
  2. CH3OH
  3. CH2Cl3
  4. CH3Cl2
D
Q.120: The molecular formula of glucose?
  1. C6H11O5
  2. C6H12O5
  3. C6H11O6
  4. C6H12O6
B

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