Chemistry set 1 MCQs

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Showing 504 questions
Q.121 Select the name of the hydrocarbon with a structural formula CH3 − CH2 − CH2 − CH2 −CH2−CH3.
A 2-Methylpentane
B n-Hexane
C 2,2-Dimethylbutane
D 3-methyl hexane
Discuss / Board
Q.122 Which of the following is a CLOSED chain organic compound?
A Ethane
B Isobutane
C Acetic acid
D Cyclopropane
Discuss / Board
Q.123 Name the white precipitate formed in the reaction of sodium sulphate and barium chloride.
A Sodium chloride
B Sodium oxide
C Barium hydroxide
D Barium sulphate
Discuss / Board
Q.124 The depositional pattern of CaCO3 and other materials that extend upwards from the floor of a limestone cavern is known as:
A Stalactite
B Dripstone
C Stalagmite
D Hatectite
Discuss / Board
Q.125 Which of the following organic compounds is a benzenoid?
A Aniline
B Hexane
C Propane
D Acetaldehyde
Discuss / Board
Q.126 Which of the following is the IUPAC name of m-Dichlorobenzene?
A 3,4-Dichlorobenzene
B 1,2-Dichlorobenzene
C 2,3-Dichlorobenzene
D 1,3-Dichlorobenzene
Discuss / Board
Q.127 2-Methylpropan-2-ol is commonly known as:
A prim-propyl alcohol
B tert-butyl alcohol
C ethyl alcohol
D methanol
Discuss / Board
Q.128 In the IUPAC name of a compound, the indicates the total number of carbon atoms present in the longest carbon chain belonging to the compound.
A Word root
B Prefix
C Primary suffix
D Secondary suffix
Discuss / Board
Q.129 In which of the following years did Antoine Lavoisier discover the law of conservation of mass and state that mass is conserved in
A 1787
B 1786
C 1788
D 1789
Discuss / Board
Q.130 H2 is a molecular formula indicating how many atoms are bonded in a single molecule of hydrogen gas?
A 5
B 4
C 3
D 2
Discuss / Board
Q.131 Which of the following formulas represents the strongly basic chemical compound Barium Hydroxide?
A Ba(OH)3
B Ba(OH)2
C Ba2OH
D BaOH
Discuss / Board
Q.132 Which of the following statement is correct regarding rate of diffusion of liquids? I. Rate of diffusion of liquids is higher than that of solids. II. This is due to the fact that in the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state.
A Neither I nor II
B Both I and II
C Only I
D Only II
Discuss / Board
Q.133 Liquids flow and change shape, they are NOT rigid and thus they are also called as ..........
A liquefied
B Mixtures
C fluid
D Solution
Discuss / Board
Q.134 How many horizontal rows are present in the modern periodic table?
A 7
B 11
C 5
D 9
Discuss / Board
Q.135 How many vertical columns are present in the modern periodic table?
A 16
B 14
C 20
D 18
Discuss / Board
Q.136 What is the other name for solid carbon dioxide?
A White ice
B Ice at room temperature
C Dry ice
D Freezed ice
Discuss / Board
Q.137 Mendeleev's Periodic Law was modified, and was adopted as the basis of the Modern Periodic Table.
A Atomic mass
B Molar mass
C Atomic number
D Similar properties
Discuss / Board
Q.138 Elements in the Modern Periodic Table are arranged in vertical columns called groups and horizontal rows called periods.
A 18,7
B 16,7
C 18,9
D 16,9
Discuss / Board
Q.139 How many elements are present in the first period of the periodic table?
A Five
B Three
C Four
D Two
Discuss / Board
Q.140 In the periodic table, which group consists of elements known as the noble gases?
A Group 17
B Group 1
C Group 18
D Group 7
Discuss / Board
Q.141 Which element has the highest atomic number and is the heaviest naturally occurring element?
A Thorium (Th)
B Uranium (U)
C Plutonium (Pu)
D Neptunium (Np)
Discuss / Board
Q.142 In 1866, John Newlands, an English scientist, arranged the then known elements in the order of It is known as 'Newlands' Law of Octaves'.
A decreasing atomic masses
B decreasing atomic number
C increasing atomic masses
D increasing atomic number
Discuss / Board
Q.143 The Modern Periodic Table has 18 vertical columns known as 'groups' and horizontal rows known as 'periods'.
A 7
B 6
C 8
D 12
Discuss / Board
Q.144 .........of a substance is the temperature and pressure at which three phases (gas, liquid, and soli(D) of that substance may coexist in thermodynamic equilibrium.
A Tri-state
B Amphibious
C Triple-point
D Allotropic
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Q.145 Which historical gas law states that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature?
A Charles's law
B Boyle's law
C Gay-Lussac's law
D Avogadro's law
Discuss / Board
Q.146 At absolute zero ( 0 K or −273.15∘C ), the particles of matter:
A Vibrate in fixed positions
B Stop moving
C Move at the speed of light
D Undergo fusion
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Q.147 Non-metals, are electronegative. They tend to form bonds by electrons.
A subtracting two
B gaining
C substituting
D losing
Discuss / Board
Q.148 When Mendeleev started his work, how many elements were known at that time?
A 56
B 61
C 63
D 72
Discuss / Board
Q.149 ........is a form of matter in which many of the electrons wander around freely among the nuclei of the atoms.
A Plasma
B Solid
C Liquid
D Gas
Discuss / Board
Q.150 Which of the following gases, when cooled and compressed, can change from a gas to a supercritical fluid state?
A Steam
B Carbon dioxide (CO2)
C Hydrogen (H2)
D Oxygen (O2)
Discuss / Board

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