ICSE Class 10 Chemistry Solutions Viraf J Dalal

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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

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(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.

Option a – They are insoluble in organic solvents like benzene, ether, alcohol, etc

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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