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ICSE Class 10 Chemistry Solutions Viraf J Dalal Objective for Students
Neon lights are used in warning signal illuminations because
(A) Neon lights are visible from a long distance.
(B) Neon lights are visible through for and mist.
(C) Neon lights have beautiful coloration.
(D) Both ‘A’ and ‘B’
Option d – Both ‘A’ and ‘B’
Which one of the following noble gas is used in miner’s cap lamps?
(A) Helium
(B) Neon
(C) Argon
(D) Krypton
Option d – Krypton
In xenon halides XeF2, X2Cl2, XeBr₂ the stability decreases in the order
(A) XeBr₂ > XeCl2 > XeF2
(B) XeF2 > XeCl₂ > XeBr2
(C) XeCl₂ > XeBr2 > XeF2
(D) XeBr₂ > XeF2 > XeCl₂
Option b – XeF2 > XeCl₂ > XeBr2
In the solid state, argon atoms are held by
(A) Ionic bonds
(B) Covalent bonds
(C) Hydrogen bonds
(D) Vander Waal’s forces
Option d – Vander Waal’s forces
The extent of adsorption on coconut charcoal is minimum for the noble gas?
(A) He
(B) Ne
(C) Kr
(D) Xe
Option a – He
Which of the following is used in very low-temperature thermometers?
(A) He
(B) Ne
(C) H₂
(D) N₂
Option a – He
Which of the following light is effective in the formation of chlorophyll?
(A) Sodium lamp
(B) Neon lamp
(C) Mercury lamp
(D) Argon lamp
Option b – Neon lamp
The oxidation states of most electronegative elements in the product of the reaction of BaO2 with dil.H₂SO4 are
(A) 1 and 2
(B) -1 and +2
(C) -2 and -2
(D) -2 and -1
Option d – -2 and -1
On heating KClO3 we get
(A) KCIO2 + O2
(B) KCl + O₂
(C) KCl + 03
(D) KCI + O₂ + 03
Option d – KCI + O₂ + O3
The oxyacid of sulfur that contains a lone pair of electrons on sulfur is
(A) Sulphurous acid
(B) Sulphuric acid
(C) Peroxodisulphuric acid
(D) Pyrosulphuric acid
Option a – Sulphurous acid
Arrange the following hydrides of group 16 elements in order of increasing stability
(A) H₂S <H₂O <H₂Te <H₂Se
(B) H₂S <H₂Te <H₂Se <H₂S
(C) H₂O <H₂S <H₂Se <H₂Te
(D) H₂Te < H₂Se <H₂S <H₂O
Option d – H₂Te
The hybridization of sulfur in sulfur hexafluoride is
(A) sp³d
(B) sp³d²
(C) sp³d³
(D) sp³
Option b – sp³d²
The sulfur molecule is
(A) Diatomic
(B) Triatomic
(C) Tetratomic
(D) Octa-atomic
Option d – Octa-atomic
Which one of the following is a globular protein?
(A) Serum albumin
(B) Myosin
(C) Hair
(D) Wool
Option a – Serum albumin
Conversion of milk into curd, and boiling of egg are examples of
(A) Denaturation of proteins
(B) Oxidation of carbohydrates
(C) Formation of peptide linkage
(D) Hydrolysis of carbohydrates
Option a – Denaturation of proteins
Two types of proteins are
(A) Secondary and tertiary
(B) Tertiary and quaternary
(C) Simple and mixed
(D) Fibrous and globular
Option d – Fibrous and globular
The polypeptide chains are held together by
(A) Intramolecular H bonds
(B) Intermolecular H bonds
(C) Glycosidic linkages
(D) Sulphur linkages.
Option b – Intermolecular H bonds
The helical structure of proteins is stabilized by
(A) Vander Waal’s forces
(B) Dipeptide bonds
(C) Peptide bonds
(D) Hydrogen bonds
Option d – Hydrogen bonds
Which one among the following is used in making gunpowder?
(a) Magnesium sulfate
(b) Potassium nitrate
(c) Sodium stearate
(d) Calcium sulfate
Option b – Potassium nitrate
To reduce tooth decay, most toothpastes contain:
(a) Bromide
(b) Fluoride
(c) Iodide
(d) Chloride
Option b – Fluoride
Ammonia (NH3) obtained from different sources always has the same proportion of nitrogen and hydrogen. It proves the validity of the law of:
(a) Reciprocal proportion
(b) Constant proportion
(c) Multiple proportions
(d) None of these
Option b – Constant proportion
Boric acid is an acid because its molecule:
(a) Accepts OH from water, releasing a proton
(b) Combines with a proton from a water molecule
(c) Contains a replaceable H+ ion
(d) Gives up a proton
Option c – Contains a replaceable H+ ion
The main constituent of Vinegar is:
(a) Acetic acid
(b) Ascorbic acid
(c) Citric acid
(d) Tartaric acid
Option a – Acetic acid
If cold barium chloride is mixed with H₂SO4 which of the following is formed?
(A) HNO₂ + BaSO4
(B) HNO3 + BaSO4
(C) BaSO4 + NO2
(D) BaSO4 + N₂O3
Option a – HNO₂ + BaSO4
The compound of sulphur that can be refrigerant is
(A) SO2
(B) SO3
(C) S₂Cl₂
(D) H₂SO4
Option a – SO2
The bond angles of the SF4 molecule are
(A) 102°, 173°
(B) 89°, 117°
(C) 120°, 180°
(D) 45°, 118°
Option a – 102°, 173°
The oxide which acts as a reducing, oxidising, bleaching agent and Lewis base is
(A) SO3
(B) SO2
(C) MnO₂
(D) CO2
Option b – SO2
Sulphur reacts with chlorine in 1 : 2 ratio and forms X. Hydrolysis of X gives a sulphur compound Y. What is the structure and hybridization of the anion of Y?
(A) Tetrahedral, sp³
(B) Linear, sp
(C) Pyramidal, sp³
(D) Trigonal planar, sp²
Option c – Pyramidal, sp³
Passing H₂S gas through nitric acid produces
(A) Rhombic sulphur
(B) Colloidal sulphur
(C) Amorphous sulphur
(D) Plastic sulphur
Option b – Colloidal sulphur
Fluorine, chlorine, bromine, iodine and astatine are members of group…… P… and are known as ..Q……… Here P and Q refer to ……..
(A) P-17, Q-halogens
(B) P-17, Q-halogens
(C) P-16, Q-halogens
(D) P-16, Q-halogens
Option b – P-17, Q-halogens
Fluorine and chlorine are ….P….., bromine is a …. Q and iodine is a ….R…… Here P, Q and R refer to
(A) P-solids, Q-liquid, R-gas
(B) P-solids, Q-gas, R-liquid
(C) P-gases, Q-solid, R-liquid
(D) P-gases, Q-liquid, R-solid
Option d – P-gases, Q-liquid, R-solid
Which of the following is used to absorb sulphur dioxide?
(A) Conc. H₂SO4
(B) KOH solution
(C) Water
(D) Anhydrous CaCl₂
Option b – KOH solution
The crystalline form of the sulphur stable at room temperature is
(A) Rhombic sulphur
(B) Monoclinic sulphur
(C) Plastic sulphur
(D) Primatic sulphur
Option a – Rhombic sulphur
Decreasing order of B.P. is
(A) H₂O > H₂S > H₂Se > H₂Te
(B) H₂O > H₂Te > H₂Se > H₂S
(C) H₂O > H₂Se > H₂Te > H₂S
(D) H₂O > H₂S > H₂Te > H₂Se
Option b – H₂O > H₂Te > H₂Se > H₂S
The angular shape of the ozone molecule (O3) consists of
(A) 1 sigma bond 1 pi bond
(B) 2 sigma bond 1 pi bond.
(C) 1 sigma bond 2 pi bond
(D) 2 sigma bond 2 pi bond
Option b – 2 sigma bond 1 pi bond
Photo-conductors of Xerox machine uses
(A) Mercury
(B) Black phosphorus
(C) Selenium
(D) Tellurium
Option c – Selenium
Alkane nitriles on heating with dilute hydrochloric acid gives:
(A) Potassium salt of carboxylic acid
(B) Alkanoic acid
(C) Alkanamine
(D) Nucleic acid
Option b – Alkanoic acid
Alkaline hydrolysis of ester is called as saponification due to:
(A) Formation of alkali alkoxide
(B) Formation of glycol
(C) Formation of soaps
(D) Formation of alcohols
Option c – Formation of soaps
The wrong statement about methanal is:
(A) It is a gas at room temperature.
(B) Aqueous solution of methanal gas is formalin.
(C) It has a sweet odor.
(D) Dry methanal is obtained by heating paraformaldehyde.
Option c – It has a sweet odor
Pair of solid trimer and tetramer of ethanal is:
(A) Tetraldehyde and trioxane
(B) Trioxane and metaldehyde
(C) Metaldehyde and paraldehyde
(D) Paraldehyde and metaldehyde
Option d – Paraldehyde and metaldehyde
Aqueous solution of formaldehyde gas is:
(A) Formonitrile
(B) Formalin
(C) Urotropin
(D) Metaldehyde
Option b – Formalin
During the reaction between propionaldehyde and ammonical silver nitrate reagent:
(A) Ammonical silver nitrate is oxidized
(B) Propionaldehydes are reduced.
(C) Ammonical silver nitrate is reduced
(D) Fehling solution acts as a reducing agent.
Option c – Ammonical silver nitrate is reduced
Find out the incorrect statement about carboxylic acids:
(A) Aromatic carboxylic acids are highly soluble in water.
(B) Lower members of carboxylic acids are soluble in water
(C) Ethanoic acid in a solid state below 289.5 K is called glacial acetic acid.
(D) Lower members are colorless liquids having an irritating odor.
Option a – Aromatic carboxylic acids are highly soluble in water
Correct statement about alkanals and alkanones is:
(A) Aromatic alkanals are less reactive than aliphatic alkanals.
(B) As the steric effect of alkyl groups increases, the reactivity of alkanals and alkanones increases.
(C) +I effect of the alkyl group linked to the carbonyl carbon increases their reactivity.
(D) Carbonyl carbon in aromatic alkanals and alkanones is more electron-deficient due to the electron-attracting resonance effect.
Option a – Aromatic alkanals are less reactive than aliphatic alkanals
Acetic acid on heating with ammonia produces:
(A) Ethanamide
(B) Ethyl amine
(C) Ethyl diazonium chloride
(D) Ethyl acetate
Option a – Ethanamide
Ethanoyl chloride on reacting with ammonia produces:
(A) Ethanamine
(B) Acetamide
(C) Methanamide
(D) Propanamide
Option b – Acetamide
Phthalimide is prepared by strong heating ammonia with:
(A) Benzene-1,2-dicarboxylic acid
(B) o-toluic acid
(C) Phthaldehyde
(D) Phthalic anhydride
Option a – Benzene-1,2-dicarboxylic acid
Propane is prepared by decarboxylation of:
(A) Propionic acid
(B) Potassium propionate
(C) Butyric acid
(D) Sodium butyrate
Option d – Sodium butyrate
Incorrect statement about the solubility of alkanals and alkanones is:
(A) They are insoluble in organic solvents like benzene, ether, alcohol, etc.
(B) Lower alkanals and alkanones form hydrogen bonds with water.
(C) Their solubility in water decreases with an increase in carbon atoms.
(D) Lower aldehydes and ketones are soluble in water.
Vicinal dihalide is also called ________ dihalide.
(A) Alkylidene
(B) Alkylene
(C) Alkenyl
(D) Alkynyl
Option b – Alkylene
Isobutyl chloride is a haloalkane.
(A) Primary
(B) Secondary
(C) Tertiary
(D) Allylic
Option a – Primary
Ethylene dibromide and ethylidene dibromide are:
(A) Chain isomers
(B) Position isomers
(C) Functional isomers
(D) Optical isomers
Option b – Position isomers
n-pentyl chloride and isopentyl chloride are:
(A) Chain isomers
(B) Functional isomers
(C) Metamers
(D) Position isomers
Option a – Chain isomers
1-nitropropane’s functional isomer is:
(A) n-propyl nitrite
(B) n-propyl amine
(C) 2-nitropropane
(D) 1,2-dinitropropane
Option a – n-propyl nitrite
IUPAC name of benzyl chloride is:
(A) Chlorobenzene
(B) Phenyl methyl chloride
(C) Chlorophenyl methane
(D) Chloromethyl benzene
Option c – Chlorophenyl methane
Ethylene dihalide is a ________ type.
(A) Vicinal
(B) Allylic
(C) Geminal
(D) Vinylic
Option a – Vicinal
n-propyl iodide and isopropyl iodide are:
(A) Tautomers
(B) Chain isomers
(C) Position isomers
(D) Metamers
Option c – Position isomers
The major monochlorination product of isobutane is:
(A) 2-chloro-2-methylpropane
(B) 1-chloro-2-methylpropane
(C) 2-chlorobutane
(D) 2-chloropentane
Option a – 2-chloro-2-methylpropane
The yield of iodoalkane obtained from alcohols and HI is very low due to:
(A) R-I is reduced by HI in alkanes
(B) HI is less reactive
(C) The reactivity of alcohols with HI is low
(D) Alcohols are oxidized by HI
Option a – R-I is reduced by HI in alkanes
The order of reactivity of alcohols with a given HX is:
(A) 1° > 2° > 3°
(B) 3° > 2° > 1°
(C) 3° > 1° > 2°
(D) 1° > 3° > 2°
Option b – 3° > 2° > 1°
Which of the following haloalkanes are not obtained by halogenation of alkanes?
(A) Iodoalkane
(B) Bromoalkane
(C) Fluoroalkane
(D) Chloroalkane
Option c – Fluoroalkane
The number of monochlorination products obtained from 2-methyl butane is:
(A) Six
(B) Four
(C) Three
(D) Two
Option b – Four
1-Iodopropane is prepared by reacting 1-bromopropane with which of the following reagents in the presence of methanol?
(A) Sodium iodide
(B) Sodium chloride
(C) Sodium bromide
(D) Sodium fluoride
Option a – Sodium iodide
Which of the following compounds reacts with SbF3 to give isopropyl fluoride?
(A) Propan-2-ol
(B) Propan-2-amine
(C) 2-Bromopropane
(D) 1-Chloropropane
Option c – 2-Bromopropane
The best method for the preparation of alkyl chloride is
(A) Swartz reaction
(B) Finkelstein reaction
(C) Wurtz reaction
(D) Darzen’s method
Option d – Darzen’s method
During the Finkelstein reaction, NaBr is precipitated by using
(A) Dry ether
(B) Dry dimethyl ketone
(C) Methanamine
(D) Nitroethane
Option b – Dry dimethyl ketone
What is the reactivity order of HX to react with alcohol?
(A) HCl < HBr > HI
(B) HCl < HBr < HI
(C) HI > HCl > HBr
(D) HCl < HI < HBr
Option b – HCl
Which one of the following is not used as fertilizer?
(a) Ammonium nitrate
(b) Ammonium sulfide
(c) Ammonium phosphate
(d) Ammonium sulfate
Option b – Ammonium sulfide
Brine is an aqueous solution of:
(a) NaCl
(b) NaOH
(c) NaHCO3
(d) Na₂CO3
Option a – NaCl
Which one of the following is NOT true for bleaching powder?
(a) It is used as a reducing agent in chemical industries
(b) It is used for bleaching wood pulp in paper factories
(c) It is used for disinfecting drinking water
(d) It is used for bleaching linen in the textile industry
Option a – It is used as a reducing agent in chemical industries
How is carbon black obtained?
(a) By heating wood at high temperature in the absence of air
(b) By heating coal at high temperature in the absence of air
(c) By burning hydrocarbons in a limited supply of air
(d) By heating coal at high temperature in the presence of air
Option c – By burning hydrocarbons in a limited supply of air
The poisonous nature of Carbon monoxide (CO) is due to its:
(a) Insolubility in water
(b) Ability to form a complex with hemoglobin
(c) Ability to reduce some metal oxides
(d) Property of having one sigma bond
Option b – Ability to form a complex with hemoglobin
Which one of the following metals is alloyed with sodium to transfer heat in a nuclear reactor?
(a) Potassium
(b) Calcium
(c) Magnesium
(d) Strontium
Option a – Potassium
Which one of the following statements is not correct?
(a) All carbons in diamonds are linked by carbon-carbon single bonds.
(b) Graphite is a layered structure in which layers are held together by weak van der Waals forces.
(c) Graphite layers are formed by hexagonal rings of carbon atoms.
(d) Graphite layers are held together by carbon-carbon single bonds.
Option d – Graphite layers are held together by carbon-carbon single bonds
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