Simplified ICSE Chemistry Class 9 Solutions by Viraf J Dalal. We covered all the Simplified ICSE Chemistry Class 9 Solutions by Viraf J Dalal in this post for free so that you can practice well for the exam.
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Simplified ICSE Chemistry Class 9 Objective Solutions by Viraf J Dalal for Students
Blood in the human body is highly buffered at pH
(A) 7.4
(B) 7.0
(C) 6.9
(D) 8.1
Option a – 7.4
The pH of the buffer solution is 5. If the pKa of a weak acid is 4. The ratio of acid to salt in the solution is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) 1 : 1
(B) 1:10
(C) 10 : 1
(D) 1 : 2
Option b – 1:10
The pH of the buffer solution prepared by adding 10 ml of 0.1 M CH3COOH and 20 ml of 0.1 M sodium acetate will be (pKa of CH3COOH = 4.74)
(A) 4.05
(B) 3.04
(C) 5.04
(D) 3.05
Option c – 5.04
In a mixture of sodium acetate and acetic acid, some amount of water is added, then the pH of the solution ( Simplified ICSE Chemistry Class 9 MCQ )
(A) Increases
(B) Decreases
(C) Unchanged
(D) Neutral
Option c – Unchanged
A solution containing an equimolar concentration of CH3COOH and CH3COONa. If the pKa of acetic acid is 4.8. The pH of the solution will be
(A) 4.8
(B) 5.101
(C) 9.2
(D) 5
Option a – 4.8
Which one of the following mixtures will act as an acidic buffer solution?
(A) CH3COOH + CH3COONH4
(B) HCI + NH4Cl
(C) HCOOH + HCOOK
(D) HCI + NaCl
Option c – HCOOH + HCOOK
A solution is 2 M of NH4OH and 2 M NH4Cl for NH4OH pKb = 4.7. The pH of the solution is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) 4.7
(B) 9.3
(C) 7
(D) 9
Option b – 9.3
The pH of the mixture of acetic acid and potassium acetate will be
(A) 0
(B) 7
(C) Less than 7
(D) More than 7
Option c – Less than 7
Which one of the following is the purest form of Carbon?
(a) Charcoal
(b) Coke
(c) Fullerene
(d) Carbon black
Option d – Carbon black
How is carbon black obtained? ( Simplified ICSE Chemistry Class 9 MCQ )
(a) By heating wood at a high temperature in the absence of air.
(b) By heating coal at a high temperature in the absence of air.
(c) By burning hydrocarbons in a limited supply of air.
(d) By heating coal at a high temperature in the presence of air.
Option c – By burning hydrocarbons in a limited supply of air
Incomplete combustion of a fuel gives poisonous ……… gas.
(a) carbon dioxide
(b) isocyanate
(c) carbon monoxide
(d) nitrogen
Option c – carbon monoxide
What is the bond order of the CO group?
(a) 1
(b) 2.5
(c) 3.5
(d) 3
Option d – 3
Which of the following statements is not true? ( Simplified ICSE Chemistry Class 9 MCQ )
(a) Buckminsterfullerene is an allotropic of carbon.
(b) Diamond is a good conductor of electricity.
(c) Graphite is a good conductor of electricity.
(d) Each carbon atom in Graphite is attached to the other three carbon atoms.
Option b – Diamond is a good conductor of electricity
Graphene is
(a) An alloy of carbon
(b) Nanostructure of carbon
(c) Isotope of carbon
(d) None of the above
Option b – Nano structure of carbon
The order of electron affinity of B, C, N, and O is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) O> B> C>N
(B) O> C> B>N
(C) B > N> C>O
(D) O> C>N> B
Option d – O> C>N> B
Oxygen molecule exhibit
(A) Paramagnetism
(B) Diamagnetism
(C) Ferromagnetism
(D) Ferrimagnetism
Option a – Paramagnetism
A salt of sulfurous acid is called
(A) Sulphate
(B) Sulphurate
(C) Sulphite
(D) Sulphonate
Option c – Sulphite
Which of the following element does not show an oxidation state of +4? ( Simplified ICSE Chemistry Class 9 MCQ )
(A) O
(B) S
(C) Se
(D) Te
Option a – O
The ozone layer is depleted by
(A) NO
(B) NO2
(C) N₂O5
(D) NO3
Option a – NO
In pyro sulfurous acid, the oxidation state of sulfur is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) Only +2
(B) Only +4
(C) +2 and +6
(D) Only +6
Option d – Only +6
Group 16 elements have a lower value of first ionization enthalpy as compared to group 15 elements because
(A) Half-filled p-orbitals in group 15 elements are more stable.
(B) Group 16 elements have a smaller size than Group 15 elements.
(C) Group 16 elements contain double bonds while Group 15 elements have triple bonds.
(D) Group 16 elements have more electrons in p-orbitals.
Option a – Half-filled p-orbitals in group 15 elements are more stable
The electron affinity of sulfur is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) More than O and Se
(B) More than O but less than Se
(C) Less than O but more than Se
(D) Equal to O and Se
Option a – More than O and Se
The minimum catenation ability is shown by
(A) Oxygen
(B) Sulphur
(C) Selenium
(D) Tellurium
Option d – Tellurium
All the elements of the oxygen family are
(A) Nonmetals
(B) Metalloids
(C) Radioactive
(D) Polymorphic
Option d – Polymorphic
When a slow dry stream of oxygen is passed through a silent electric discharge, the conversion of oxygen to ozone (10%) occurs. The product is known as P. Here P refers to ( Simplified ICSE Chemistry Class 9 MCQ )
(A) Ozonized oxygen
(B) Diatomic oxygen
(C) Both ‘A’ and ‘B’
(D) Neither ‘A’ nor ‘B’
Option a – Ozonized oxygen
Pure ozone is pale blue …p…, dark blue ….Q…. and violet-black ….R…. Here P, Q, and R refer to
(A) P-solid, Q-liquid, R-gas
(B) P-gas, Q-liquid, R-liquid
(C) P-gas, Q-solid, R-liquid
(D) P-gas, Q-liquid, R-solid
Option d – P-gas, Q-liquid, R-solid
The physical properties of group 16 elements are : (I) Polonium is metal and radioactive. (II) All these elements exhibit allotropy. (III) With the increase in atomic number, the melting and boiling point increases down the group. The option with the correct set of properties is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) I and II
(B) II and III
(C) I and III
(D) I, II, and III
Option d – I, II, and III
Rhombic sulfur has a unit
(A) S4
(B) S6
(C) S2
(D) S8
Option d – S8
Which of the following aqueous solution will have the highest freezing point? ( Simplified ICSE Chemistry Class 9 MCQ )
(A) 0.1 M urea
(B) 0.2 M cane sugar
(C) 6 g of glucose in 100 cm³
(D) 1.5 g urea in 500 cm³
Option d – 1.5 g urea in 500 cm³
The molal depression constant for water is 1.86. The freezing point of 0.1 m NaCl is
(A) -1.86°C
(B) -3.72°C
(C) -0.186°C
(D) -0.372°C
Option d – -0.372°C
The freezing point is the temperature at which ( Simplified ICSE Chemistry Class 9 MCQ )
(A) the Vapour pressure of the liquid is less than its solid.
(B) The vapor pressure of the liquid is higher than its solid.
(C) The vapor pressure of the liquid is equal to its solid.
(D) The vapor pressure of the liquid is equal to atmospheric pressure.
Option c – The vapor pressure of the liquid is equal to its solid
When a nonvolatile solute like urea is added to the pure solvent the freezing points of the solvent in the solution
(A) Increases
(B) Decreases
(C) Remains constant
(D) Becomes zero
Option b – Decreases
Depression at the freezing point is directly proportional to the
(A) Lowering in vapor pressure
(B) Molality of solution
(C) Molarity of solution
(D) Both ‘a’ and ‘b’
Option d – Both ‘a’ and ‘b’
The cryoscopic constant depends on ( Simplified ICSE Chemistry Class 9 MCQ )
(A) the Nature of the Solute
(B) the Nature of the solvent
(C) the Volume of the solvent
(D) the amount of solvent
Option b – the Nature of the solvent
Three liquids A, B, and C boils at 130°C, 160°C, and 190°C respectively. Which of them has higher vapor pressure?
(A) A
(B) C
(C) B
(D) All
Option a – A
The strongest Lewis acid among the following is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) BF3
(B) BCl3
(C) BBr3
(D) Bl3
Option d – BI3
According to Bronsted concept, the base is
(A) Proton doner
(B) Proton loser
(C) Proton accepter
(D) Electron accepter
Option c – Proton accepter
Which of the following is not a Lewis acid? ( Simplified ICSE Chemistry Class 9 MCQ )
(A) KCI
(B) SnCl4
(C) BF3
(D) FeCl3
Option a – KCl
The conjugate acid of a strong base is
(A) Strong acid
(B) Weak acid
(C) Strong base
(D) Weak base
Option b – Weak acid
Water is a ( Simplified ICSE Chemistry Class 9 MCQ )
(A) protic solvent
(B) Amphoteric acid
(C) Proton accepter
(D) None of these
Option c – Proton accepter
Among the following examples, Arrhenius acid is
(A) NH3
(B) SO2
(C) HNO3
(D) AICl3
Option c – HNO3
Which of the following is not an Arrhenius base? ( Simplified ICSE Chemistry Class 9 MCQ )
(A) NaOH
(B) NH3
(C) Ba(OH)2
(D) KOH
Option b – NH3
An electrolyte
(A) Gives complex ions in solution.
(B) Dissolved in water to give ions.
(C) Ionized in the solid state.
(D) Produce ions only when electricity passed through it.
Option b – Dissolved in water to give ions
The degree of dissociation does not depend on ( Simplified ICSE Chemistry Class 9 MCQ )
(A) the Nature of the solvent
(B) the Nature of the Solute
(C) Temperature
(D) the Electric current
Option d – the Electric current
Lewis acid
(A) Presence of H atom
(B) Electron pair doner
(C) Electron pair acceptor
(D) Electron-rich molecule
Option c – Electron pair acceptor
Lewis acids are ( Simplified ICSE Chemistry Class 9 MCQ )
(A) Electron-rich molecules or species
(B) Electron deficient species.
(C) Nucleophiles
(D) Both ‘A’ and ‘C’
Option a – Electron-rich molecules or species
The degree of ionization of a compound depends on
(A) Size and solute particles.
(B) Nature of solute
(C) Nature of vessel used
(D) Quantity of electricity passed.
Option b – Nature of solute
The volume of solution containing 34.2 g of sugar which give rise to the osmotic pressure of 1.75 atm at 0℃ is
(A) 437.5 ml
(B) 347.5 ml
(C) 750.4 ml
(D) 504.7 ml
Option a – 437.5 ml
The vapor pressure of pure water at 25°C is 30 mm. The vapor pressure of 10% glucose solution at the same temperature is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) 31.5 mm
(B) 30.6 mm
(C) 29.67 mm
(D) 28.56 mm
Option c – 29.67 mm
10 g of an organic compound per liter produces osmotic pressure of 1.18 atm at 0°C. The molar mass of the compound is (R = 0.082 lit atm)
(A) 78
(B) 94.5
(C) 189.94
(D) 120
Option c – 189.94
6 g of urea is dissolved in 90 g of water. The vapor pressure of the solution in mm Hg is
(A) 745 mm
(B) 758 mm
(C) 761 mm
(D) 760 mm
Option a – 745 mm
When NaCl is added to the urea solution the freezing point of the resulting solution as compared to the urea solution is ( Simplified ICSE Chemistry Class 9 MCQ )
(A) Lowered
(B) Raised
(C) No change
(D) Initially lowered then raised
Option c – No change
Which of the following sets of elements are called aerogens?
(A) He, Ne, Ar
(B) F. Cl, Br
(C) O. S. Se
(D) N. P. As
Option a – He, Ne, Ar
The noble gas used for the treatment of cancer is
(A) Helium
(B) Argon
(C) Krypton
(D) Radon
Option d – Radon
The compound that attacks Pyrex glass is
(A) XeF2
(B) XeF4
(C) XeF6
(D) All
Option c – XeF6
The element having the highest ionization potential is
(A) H
(B) N
(C) O
(D) He
Option d – He
XeF4 on reaction with H₂ gives
(A) Xenon
(B) Hydrogen fluoride
(C) Both ‘A’ and ‘B’
(D) None of these
Option c – Both ‘A’ and ‘B’
The noble gas forms an interstitial compound
(A) Neon
(B) Argon
(C) Helium
(D) Xenon
Option d – Xenon
A monoatomic gas reacts with fluorine to form a fluoride that dissolves in HF to give a conducting solution. The fluoride is
(A) XeF2
(B) XeF4
(C) XeF6
(D) OF2
Option c – XeF6
What volume of hydrogen gas at 273 K and I atm pressure will be consumed in obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen?
(A) 67.2 L
(B) 44.8 L
(C) 22.4 L
(D) 89.6 L
Option a – 67.2 L
Carbon reacts with oxygen to form two compounds: carbon monoxide and carbon dioxide. The ratio of masses of oxygen that combine with the same mass of carbon in carbon monoxide and carbon dioxide is ………
(A) 1 : 2
(B) 2 : 1
(C) 1 : 3
(D) 3 : 4
Option a – 1 : 2
84 g of a gas occupies the same volume as 96 g of oxygen under similar conditions of temperature and pressure. The molecular weight of the gas is ………
(A) 36.5 g
(B) 28 g
(C) 14 g
(D) 18.2 g
Option b – 28 g
The volume of CO₂ obtained on the complete decomposition of 19.73 g of BaCO3 at STP is (Atomic mass: Ba = 137.3, C = 12,0=16)
(A) 2.24 L
(B) 1.12 L
(C) 0.84 L
(D) 0.56 L
Option a – 2.24 L
The molecular mass and empirical formula of a compound are 180 g and CH₂O respectively. What will be the molecular formula of the compound?
(A) C9H1809
(B) CH₂O
(C) C6H12O6
(D) C₂H4O₂
Option c – C6H12O6
The number of grams of oxygen in 0.10 mole of Na₂CO3.10H₂O is ………..
(A) 13 g
(B) 20.8 g
(C) 18 g
(D) 208 g
Option b – 20.8 g
The maximum volume of 0.25 M HCl which can be made by using one liter of 0.15 M HCl and one liter of 0.40 M HCl without adding water is ……….. Assume that volumes are additive.
(A) 2 L
(B) 2.2 L
(C) 1.667 L
(D) 0.55 L
Option c – 1.667 L
What is the mass of carbon dioxide which contains the same number of molecules as are present in 40 g of oxygen?
(A) 40 g
(B) 55 g
(C) 32 g
(D) 44 g
Option b – 55 g
Amount of NO(g) formed in grams by oxidation of 1 mole of NH3(g) by 1 mole of O2(g) is ………….
(A) 30.0 g
(B) 54.0 g
(C) 60.0 g
(D) 24.0 g
Option d – 24.0 g
A mixture of gases contains H₂ and O. gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the H₂ and O₂ gases in the mixture?
(A) 16 : 1
(B) 2 : 1
(C) 1 : 4
(D) 4 : 1
Option d – 4 : 1
A mixture of Nal and NaCl on reaction with H₂SO4 gave Na₂SO4 equal to the weight of the original mixture taken. The mass percentage of Nal in the original mixture is ……… (Atomic weight of Na= 23, 1= 127, S = 32, Cl = 35.5, O=16)
(A) 15.38
(B) 28.38
(C) 62.38
(D) 82.38
Option b – 28.38
Two samples of a compound of hydrogen and oxygen obtained by two different processes were analyzed. One sample contained 0.2 g of hydrogen and 3.2 g of oxygen. The other sample contained 5.88 % hydrogen and 94.12% oxygen. The experimental data obtained ……..
(A) supports the law of conservation of mass
(B) supports the law of definite proportions
(C) does not support the law of definite proportions
(D) shows that the composition of elements present is different for both the samples
Option b – supports the law of definite proportions
A gaseous hydrocarbon upon combustion gives 0.72 g of water and 3.08 g of CO₂. The empirical formula of the hydrocarbon is ………..
(A) C₂H4
(B) C₂H4
(C) C6Hs
(D) C7H8
Option d – C7H8
81.4 g sample of ethyl alcohol contains 0.002 g. The amount of pure ethyl alcohol in water. sample up to the proper number of present in the significant figures is ………..
(A) 81.4 g
(B) 71.40 g
(C) 81.398 g
(D) 81 g
Option a – 81.4 g
Total number of electrons in 1 mole of CO₂ (in terms of N₁) is ………
(A) 3NA
(B) NA
(C) 16NA
(D) 22NA
Option d – 22NA
Equal masses of H₂, O₂, and CH have been taken in a container of volume (V) at a temperature of 27 °C in identical conditions. The ratio of the volumes of gases H₂ : O₂ : CH4 would be ………..
(A) 8 : 16 : 1
(B) 16 : 8 : 1
(C) 16 : 1 : 2
(D) 8 : 1 : 2
Option c – 16 : 1 : 2
The amount of HCl in gastric juice is about 3.0 g per liter. If a person produces 2.5 liters of gastric juice per day then the number of antacid tablets each containing 300 mg of Al(OH)3 needed to neutralize the HC1l produced in one day is approximately ………(Atomic mass of Al = 27, CI = 35.5, O = 16, H= 1)
(A) 12
(B) 15
(C) 18
(D) 25
Option c – 18
A sample of hydrated barium chloride weighing 61 g was heated until all the water of hydration is removed. The weight of the dried sample was found to be 52 g. What is the formula of the hydrated salt? (Atomic mass of Ba = 137, Cl = 35.5)
(A) BaCl₂.H₂O
(B) BaCl₂.2H₂O
(C) BaCl₂.3H₂O
(D) BaCl₂.4H₂O
Option b – BaCl₂.2H₂O
Which of the following statements about a compound is INCORRECT?
(A) A molecule of a compound has atoms of different elements.
(B) A compound cannot be separated into its constituent elements by physical methods of separation.
(C) A compound retains the physical properties of its constituent elements.
(D) The ratio of atoms of different elements in a compound is fixed.
Option c – A compound retains the physical properties of its constituent elements.
If the temperature (X°) of a substance is the same when expressed in °F and °C, then the value of Xº will be ………
(A) 180°
(B) – 273°
(C) – 40°
(D) – 32°
Option c – – 40°
An organic compound made up of C, H and N contain 20% nitrogen. What will be its molar mass in grams if it contains only one nitrogen atom per molecule of the compound?
(A) 70
(B) 140
(C) 100
(D) 65
Option a – 70
The amount of sodium sulphate formed when 1 L of 0.1 M sulphuric acid is allowed to react with 1 L of 0.1 M sodium hydroxide is …………..
(A) 7.10 g
(B) 3.55 g
(C) 28.4 g
(D) 142 g
Option a – 7.10 g
The volume occupied by 2 g of the gas at STP having vapor density 11.2 is ……….. ( Class 11 Chemistry Chapter 1 MCQ )
(A) 2 L
(B) 4 L
(C) 11.2 L
(D) 22.4 L
Option a – 2 L
Excess carbon dioxide is passed through 50 mL of 0.5 M calcium hydroxide solution. After the completion of the reaction, the solution was evaporated to dryness. The solid calcium carbonate was completely neutralized with 0.1 M hydrochloric acid. What will be the volume of hydrochloric acid required for the complete neutralization of CaCO3? (Atomic mass of Ca = 40)
(A) 200 mL
(B) 300 mL
(C) 400 mL
(D) 500 mL
Option d – 500 mL
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