Chemistry Class 9 Chapter 1 MCQs. We covered all the Chemistry Class 9 Chapter 1 MCQs in this post for free so that you can practice well for the exam.
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Chemistry Class 9 Chapter 1 Objective MCQs for Students
Pure bromoalkane is prepared from bromination of which alkane?
(A) Ethane
(B) Propane
(C) 2-methyl propane
(D) Isopentane
Option a – Ethane
Which of the following compounds yields only one product on monobromination? ( Chemistry Class 9 Chapter MCQ )
(A) n-Butane
(B) Propane
(C) Neopentane
(D) Isopentane
Option c – Neopentane
Direct iodination of alkanes is a reversible reaction because
(A) R-I is reduced by HI
(B) R-I is oxidized by HI
(C) HIO3 oxidizes HI
(D) R-I reduce HCl
Option a – R-I is reduced by HI
The major additional product of HBr with isobutylene is ( Chemistry Class 9 Chapter MCQ )
(A) Isobutyl bromide
(B) Sec. butyl bromide
(C) Ter. butyl bromide
(D) n-butyl bromide
Option c – Ter. butyl bromide
3-Chloropropene is obtained by reacting propene and which of the following reagents in the presence of UV light?
(A) Sulfuryl chloride
(B) Thionyl chloride
(C) Benzyl chloride
(D) Vinyl chloride
Option a – Sulfuryl chloride
Synthesis of fluoroalkane is best accomplished by ( Chemistry Class 9 Chapter MCQ )
(A) Wurtz reaction
(B) Sandmayer’s reaction
(C) Finkelstein reaction
(D) Swartz reaction
Option d – Swartz reaction
Which of the following is not formed during the chlorination of ethane?
(A) Chloroethene
(B) Ethylene chloride
(C) Ethylidene dichloride
(D) Ethyl chloride
Option a – Chloroethene
During the preparation of isopropyl chloride from propane, the intermediate obtained is ( Chemistry Class 9 Chapter MCQ )
(A) n-propyl free radical
(B) isopropyl free radical
(C) isopropyl carbonium ion
(D) isopropyl carbanion
Option b – isopropyl free radical
3-Methyl butan-2-ol reacts with Lucas reagent to form
(A) 2-chloro-2-methyl butane
(B) 2-chloro-3-methyl butane
(C) 1-chloro-2-methyl butane
(D) 1-chloro-3-methyl butane
Option a – 2-chloro-2-methyl butane
Which of the following contains the number of color waves? ( Chemistry Class 9 Chapter MCQ )
(A) PPL
(B) Monochromatic light
(C) Colored light
(D) Ordinary light
Option d – Ordinary light
A research student, when trying to get ethyl chloride from ethanol, noticed that extra heating was required despite the reagent, which he didn’t require while preparing tert-butyl chloride. The reagent must be
(A) Groove’s reagent
(B) Sandmayer’s reagent
(C) Darzen’s reagent
(D) Lucas reagent
Option d – Lucas reagent
Vijay is performing a reaction between 2-methyl prop-1-ene and hydrogen bromide in the presence of Na2O2. His major product might be a haloalkane. ( Chemistry Class 9 Chapter MCQ )
(A) Primary
(B) Secondary
(C) Tertiary
(D) Vinylic
Option a – Primary
Four students found the relation between the boiling point for halides of ethane. Who is most likely to be correct? [R is the ethyl group]
(A) Sundarm: RCl > RBr > RI
(B) Vajid: RI > RBr > RCl
(C) Tom: RBr > RI > RCl
(D) Surinder: RCl > RI > RBr
Option b – Vajid: RI > RBr > RCl
Nicol’s prism is constructed by cementing two crystals of CaCO3 using adhesive ( Chemistry Class 9 Chapter MCQ )
(A) Glycine
(B) Canada balsam
(C) Cement
(D) Synthetic gum
Option b – Canada balsam
Dextro rotatory isomers rotate the plane of plane-polarized light in
(A) Left side
(B) Anticlockwise direction
(C) Right side
(D) Left or right side
Option c – Right side
Tetrahedral carbon linked to four different atoms or groups is called ( Chemistry Class 9 Chapter MCQ )
(A) Optically inactive carbon
(B) Optically active carbon
(C) Achiral carbon
(D) Stereocenter
Option d – Stereocenter
An organic substance is asymmetric and optically active when
(A) It has an asymmetric carbon and lacks symmetry.
(B) It has an asymmetric carbon and one of the symmetry.
(C) It has no asymmetric carbon but has symmetry.
(D) It has no asymmetric carbon and symmetry.
Option a – It has an asymmetric carbon and lacks symmetry
The equimolar mixture of d and l forms of optically active compounds is called ( Chemistry Class 9 Chapter MCQ )
(A) Optical antipodes
(B) Enantiomers
(C) Racemic mixture
(D) Optical isomers
Option c – Racemic mixture
Light containing single-color waves vibrating in all possible planes is called
(A) Ordinary light
(B) Monochromatic light
(C) Plane-polarized light
(D) Red-colored light
Option b – Monochromatic light
A beam of light vibrating in a single plane is called ( Chemistry Class 9 Chapter MCQ )
(A) Nicol’s prism
(B) Plane-polarized light
(C) Monochromatic light
(D) Ordinary light
Option b – Plane-polarized light
Nicol’s prism is constructed from
(A) Calcite
(B) CaCO3
(C) Iceland spar
(D) Any of these
Option d – Any of these
Molecularity of a reaction is decided on the basis of
(A) Transition state
(B) Fast step
(C) Kinetic expression
(D) Rate-determining step
Option d – Rate-determining step
Chiral molecules are those which are ( Chemistry Class 9 Chapter MCQ )
(A) Show chain isomerism
(B) Show metamers
(C) Superimposable on their mirror image
(D) Non-superimposable on their mirror image
Option d – Non-superimposable on their mirror image
The total number of optical isomers of fructose is
(A) 2
(B) 4
(C) 8
(D) 16
Option c – 8
The process of separation of a racemic mixture into d and l enantiomers is called ( Chemistry Class 9 Chapter MCQ )
(A) Resolution
(B) Dehydration
(C) Revolution
(D) Dehydrohalogenation
Option a – Resolution
A detailed study of the path followed by reactants during their conversion into products is called:
(A) Order of reaction
(B) Mechanism of reaction
(C) Rate of reaction
(D) Molecularity of reaction
Option b – Mechanism of reaction
Objects that are superimposable in their mirror images are called
(A) Chiral
(B) Achiral
(C) Asymmetric molecules
(D) Configuration
Option b – Achiral
Find out the wrong statement about optical activity:
(A) Sphere, cube, and cone are superimposable with their mirror images.
(B) Pair of human hands are superimposable with each other.
(C) The objects which are superimposable with mirror images are called chiral molecules.
(D) The objects that are non-superimposable with mirror images are called achiral molecules.
Option b – Pair of human hands are superimposable with each other
The process of conversion of enantiomers into a racemic mixture is called
(A) Retention of configuration
(B) Racemisation
(C) Racemic modification
(D) Inversion of configuration
Option b – Racemisation
Which of the following haloalkanes is gaseous?
(A) Pentyl chloride
(B) Propyl chloride
(C) Ethyl chloride
(D) Butyl chloride
Option c – Ethyl chloride
Select the correct order of boiling point of alkyl halide.
(A) 1-chlorobutane > 2-chlorobutane > 2-chloro-2-methyl propane
(B) 2-chlorobutane > 2-chloro-2-methylpropane > 1-chlorobutane
(C) 2-chloro-2-methyl 1-1 propane > chlorobutane > 2-chlorobutane
(D) 1-chlorobutane > 2-chloro-2-methyl propane > 2-chlorobutane
Option a – 1-chlorobutane > 2-chlorobutane > 2-chloro-2-methyl propane
The property of a substance to rotate the plane of plane-polarized light toward clockwise or anticlockwise direction is called
(A) Optical inactivity
(B) Optical activity
(C) Asymmetric compound
(D) Racemates
Option b – Optical activity
The angle through which the plane of plane-polarized light is rotated is measured by
(A) Chirality meter
(B) Stereometer
(C) Optical meter
(D) Polarimeter
Option d – Polarimeter
The number of reactants whose concentration decides the rate of reaction is called as
(A) Molecularity of reaction
(B) Kinetic expression
(C) Mechanism
(D) Order of reaction
Option d – Order of reaction
If the hydroxyl group in 2-hydroxypropanoic acid is replaced by a hydrogen atom, what will happen?
(A) Optical activity is lost
(B) Optical activity is retained
(C) Form a racemic mixture
(D) Produce a non-superimposable mirror image
Option a – Optical activity is lost
n-propyl bromide on boiling with aqueous caustic soda undergoes
(A) Hydrolysis
(B) Electrophilic substitution
(C) Free radical substitution
(D) Elimination
Option a – Hydrolysis
Ter. pentyl chloride on heating with moist silver oxide produces
(A) 2,2-dimethyl propane-1-ol
(B) Isopentyl alcohol
(C) ter. butyl alcohol
(D) 2-Methyl butan-2-ol
Option d – 2-Methyl butan-2-ol
Methyl iodide on heating with alcoholic potassium cyanide produces
(A) Nitromethane
(B) Acetonitrile
(C) Methyl isocyanide
(D) Formonitrite
Option b – Acetonitrile
What are the constituents of alloy solder?
(a) Pb and Zn
(b) Pb and Sn
(c) Pb and Si
(d) Pb and Co
Option b – Pb and Sn
Which one of the following acids is secreted by the leaves of Nettle that causes painful stings?
(a) Methanoic acid
(b) Citric acid
(c) Tartaric acid
(d) Acetic acid
Option a – Methanoic acid
When copper reacts with moist carbon dioxide (CO2) in the air, it forms a green coating of which one of the following compounds?
(a) Cupric carbonate
(b) Cuprous oxide
(c) Cupric oxide
(d) Copper sulfate
Option a – Cupric carbonate
What is the name of the process that converts sulfide ores into oxides by heating strongly in the presence of excess air?
(a) Calcination
(b) Roasting
(c) Smelting
(d) Incineration
Option b – Roasting
Which one of the following gases produces a red light when electricity flows through it?
(a) Helium
(b) Argon
(c) Nitrogen
(d) Neon
Option d – Neon
Which one of the following methods can be used to remove the permanent hardness of water?
(a) Boiling
(b) Ion-exchange
(c) Lime treatment
(d) Bubbling sulfur dioxide gas
Option b – Ion-exchange
Which one of the following is NOT a component of photochemical smog?
(a) Ozone
(b) Peroxyacetyl nitrate
(c) Polycyclic aromatic hydrocarbons
(d) Nitric oxide
Option c – Polycyclic aromatic hydrocarbons
Which one of the following statements is NOT correct?
(a) Buckminsterfullerene is an allotrope of carbon
(b) Diamond is a good conductor of electricity
(c) In graphite, each carbon atom is linked to three other carbon atoms
(d) Atomic weight is the most fundamental characteristic of an element
Option b – Diamond is a good conductor of electricity
Which one of the following statements about alkaline earth metals is NOT true?
(a) Strontium salts burn with a red flame
(b) Barium metal is used in medicine to examine the alimentary canal of a patient by X-ray
(c) Green plants need magnesium to make the chlorophyll that traps energy from sunlight in photosynthesis
(d) The red color of the gemstone Ruby is due to the element beryllium present in it
Option d – The red color of the gemstone Ruby is due to the element beryllium present in it
Which one of the following is the most fundamental characteristic of an element?
(a) Melting point
(b) Atomic number
(c) Colour
(d) Atomic weight
Option b – Atomic number
The radioactive isotope of hydrogen is:
(a) Protium
(b) Deuterium
(c) Tritium
(d) Hydronium
Option c – Tritium
Which one of the following is used for storing biological tissues?
(a) Liquid nitrogen
(b) Liquid helium
(c) Liquid argon
(d) Liquid bromine
Option a – Liquid nitrogen
Which one of the following does not form oxide on reaction with oxygen?
(a) Magnesium
(b) Lead
(c) Tin
(d) Silver
Option d – Silver
Which of the following polymers is NOT a thermoplastic?
(a) Teflon
(b) Neoprene
(c) Polystyrene
(d) Polythene
Option b – Neoprene
Symbol of the element was introduced by:
(a) John Dalton
(b) Antoine Lavoisier
(c) Jons Jacob Berzelius
(d) Robert Boyle
Option c – Jons Jacob Berzelius
Identify the correct pair of elements among the following which are liquid at room temperature and standard pressure.
(a) Bromine and fluorine
(b) Mercury and rubidium
(c) Bromine and thallium
(d) Bromine and mercury
Option d – Bromine and mercury
Which one of the following oxides shows both acidic and basic behavior?
(a) Zinc oxide
(b) Copper oxide
(c) Magnesium oxide
(d) Calcium oxide
Option a – Zinc oxide
Silver articles turn black when kept in the open for a longer time due to the formation of:
(a) H₂S
(b) AgS
(c) AgSO4
(d) Ag₂S
Option d – Ag₂S
Rutherford’s alpha particle scattering experiment on thin gold foil was responsible for the discovery of:
(a) electron
(b) proton
(c) atomic nucleus
(d) neutron
Option c – atomic nucleus
Which of the following fertilizers has more nitrogen content?
(a) Urea
(b) Ammonium Nitrate
(c) Potassium Nitrate
(d) Ammonium Phosphate
Option a – Urea
Which one of the following is known as Wood Spirit?
(a) Methanol
(b) Ethanol
(c) Formaldehyde
(d) Acetaldehyde
Option a – Methanol
Which one of the following will NOT show the Tyndall effect?
(a) Chalk powder freshly mixed with water
(b) Lime juice
(c) A few drops of milk mixed with water
(d) Starch solution
Option b – Lime juice
Which of the following are the most favorable conditions for liquefying a gas?
(a) Low-pressure and high-temperature
(b) Low pressure and low temperature
(c) High pressure and high temperature
(d) High pressure and low temperature
Option d – High pressure and low temperature
Aluminium, Iron, Copper, and Zinc are extracted from:
(a) Bauxite, Magnetite, Malachite, and Calamine respectively
(b) Magnetite, Bauxite, Malachite, and Calamine respectively
(c) Calamine, Malachite, Magnetite, and Bauxite respectively
(d) Malachite, Magnetite, Bauxite, and Calamine respectively
Option a – Bauxite, Magnetite, Malachite, and Calamine respectively
The Soda-acid fire extinguisher contains:
(a) sulphuric acid and solution of sodium hydrogen carbonate
(b) nitric acid and solution of sodium hydrogen carbonate
(c) sulphuric acid and solution of potassium carbonate
(d) nitric acid and solution of potassium carbonate
Option a – sulphuric acid and solution of sodium hydrogen carbonate
Quartz is extensively used as a piezoelectric material. It contains:
(a) Hg
(b) Si
(c) Ti
(d) Sn
Option b – Si
Which one of the following statements is not correct?
(a) Elements are defined by the number of protons they possess.
(b) Isobars are atoms having the same atomic number but different mass numbers.
(c) The mass number of an atom is equal to the number of nucleons in its nucleus.
(d) Valency is the combined capacity of an atom.
Option b – Isobars are atoms having the same atomic number but different mass numbers
In graphite, each carbon atom is bonded to three other carbon atoms:
(a) forming a three-dimensional structure
(b) in the same plane giving a hexagonal array
(c) in the same plane giving a square array
(d) in the same plane giving a pentagonal array
Option b – in the same plane giving a hexagonal array
Soap solution used for cleaning purposes appears cloudy. This is due to the fact that soap micelles can:
(a) refract light
(b) scatter light
(c) diffract light
(d) polarize light
Option b – scatter light
Employing Chromatography, one cannot separate:
(a) radio-isotopes
(b) colors from a dye
(c) pigments from a natural color
(d) drugs from blood
Option a – radio-isotopes
Consider the following statement: “The atomic number of an element is a more fundamental property than its atomic mass.” Who among the following scientists has made the above statement?
(a) Dmitri Mendeleev
(b) Henry Moseley
(c) J. J. Thomson
(d) Ernest Rutherford
Option b – Henry Moseley
Very small insoluble particles in a liquid may be separated from it by using:
(a) crystallization
(b) fractional distillation
(c) centrifugation
(d) decantation
Option d – decantation
Which one of the following statements about glass is not correct?
(a) Glass is often said to be a supercooled liquid.
(b) Glass has no definite melting point.
(c) Soda glass is harder than Pyrex glass.
(d) Boron is present in pyrex glass.
Option c – Soda glass is harder than Pyrex glass
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