Class 9 Chemistry Grand MCQs Tests Past Papers

Identify the number of electrons that the f-subshell can accommodate.

If the temperature of 30 dm³ gas is increased from 273K to 546K the volume of it will become:

A mole is an amount of substance that contains _____ particles of that substance.

A liquid boils when the vapour pressure becomes equal to:

Which of the following oxides is the most basic oxide?

Consider the following table:

Which of the following relationship does this table represent?

What is the mass of Carbon present in 44 g of Carbon dioxide?

When Uranium-238 decays into Thorium-234, it emits:

Gain of electrons and loss of oxygen is called:

Arrangement of electrons in subshells is done by using:

In which of the following processes speed of particles decrease:

From the given atomic number identify atom which will form cation.

In which of the following processes the speed of the particles decreases?

Which of the following is the correct empirical formula of C₆H₄O(NO₂)₃?

The electronic configuration of an element is 1s², 2s². An atom of this element will form an ion that will have a charge:

The elements of groups IIIA-VIIIA are called:

In NaCl cubic crystal each Cl^-1 ion is surrounded by ______ Na⁺ ions.

Gemstones are solutions of:

The Oxidation number of ‘N’ in HNO₃ is:

Which of the following halogens has lowest electronegativity?

Which of the following molecules has triple covalent bond between its atoms?

Which products are formed by the electrolysis of molten NaCl?

Rutherford used ________ particles in his experiment.

Which of the following metals is the least reactive metal?

The oxidation state of in N in NH₃ is:

\(_{10}^{20}\textrm{Ne}\) has electronic configuration:

Identify the covalent compound.

The electronic configuration “1S² 2S² 2P⁶ 3S²” belongs to:

The oxidation number of Boron B. in H₃BO₃ is:

A compound with chemical formula Na₂CX₃ has formula mass 106 amu. What is the atomic mass of the element X? [Atomic Masses: C=12, Na=23]

In which group are halogen elements present?

A liquid boils when its vapour pressure becomes equal to:

The bond formed between atoms due to transfer of electrons from one atom to another is called:

Which of the following substance has an ionic bond?

Identify the ionic compound from the given options:

In which of the following changes the nitrogen atom is reduced?

The melting point and boiling point of water are higher due to:

Which one of the following compounds is not having an ionic bond?

Which of the following ions burns with brick red flame?

Which of the following elements has greater shielding effect?

What is used to manufacture urea?

Which of the following oxides is amphoteric oxide?

Atmospheric pressure at Murree is less than 1 atm so, the boiling point of water at Murree will be:

How many molecules are present in 0.5 moles of Benzene (C₆H₆)?

Which of the following does not involve electrolytic process?

How many moles of Na atoms are present in 2.3 g of Na?

Which of the following atoms obeys the duplet rule?

Which of the following elements has a greater shielding effect?

The number of neutrons in an atom ²³M₁₁ is:

Which of the following elements in the given reaction is reduced?
ZnO + H₂  →  Zn + H₂O

The empirical formula for caffeine (C₈H₁₀N₄O₂) is:

The oxidation number of Cr in Cr₂O₃ and K₂Cr₂O₇ are:

Predict what will happen to the volume of a gas, if its pressure is raised three times, keeping the temperature constant?

Which of the following is a defect of Rutherford atomic model?

A solution contains 0.05 moles of KMnO₄ in 600 cm³ of solution. The morality of this solution is:

Which of the following is a group VIII-A element?

Some Carbon compounds such as CO, CO₂, Carbonates and Hydrogen Carbonates are studied in a branch of Chemistry called:

An electrochemical cell in which electrical energy is used to derive a chemical reaction is called:

A 100 gram solution contains 25 grams of a solute. This solution will be called:

Boyle's law explains the behaviour of gases using two variables:

If molar mass of a compound is 90 g/mole, the number of its moles containing 3.011×10²³ molecules will be:

Keeping the pressure of gas constant, average kinetic energy increase by:

Which of the following elements will gain one electron to complete its octet?

Which of the following oxides is the most basic oxide?

Which element is reduced in the given redox reaction?
ZnO + H₂  →  Zn + H₂O

‘M’ shell of an atom has the following sub-shells:

All the halogens react with metals to form salts called:

A compound with chemical formula Na₂CX₃ has formula mass of 106 amu. Atomic mass of the element “X” is:

In Halogens, the order of decreasing oxidizing power is:

Which of the following quantities are the same for one mole of hydrogen gas and one mole of water?

Which of the following oxides is utilized in breathing equipment to provide oxygen to patients?

According to Rutherford’s model the circular path in which electron revolves around nucleus is called:

Identify the element which has the largest atomic radius.

What is the reducing agent in the following reaction?
CuO + H₂ →  Cu + H₂O

Which is NOT a property of crystalline solids?

Mention the amphoteric oxide out of given oxides.

Electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p³. In which of the following groups it will be placed?

Which metal is used to make filaments of electric bulb?

A liquid boils when its vapour pressure becomes equal to:

Keeping in view Auf Bau Principle, identify the energy level which the elements fill first.

H₂S + Cl₂   →   2HCl + S
In above reaction H₂S behaves as:

Identify the metal used as a catalyst in contact process:

Particles size of colloids vary from:

Which compound acts as a fixer in photography?

Which of the following cells is used in manufacturing sodium metal?

Considering the electronic configuration of atoms, which atom with the given electronic configuration will be the most stable one and least reactive?

Which of the following is the most basic oxide?

Which of the following is the reaction taking place at anode?

Mass of Copper Sulphate dissolved in 100g of solution is called:

Which of the following substance in the given reaction is being reduced?
ZnO + H₂→Zn+H₂O

The tendency of a metal to lose electrons is called:

The oxidation state of Fe in Fe₂O₃ is:

Which isotope is used to irradiate cancer cells?

In which of the following changes the nitrogen atom is reduced?

0.25 moles of SO₂ will contain:

The bond which is formed by complete transfer of electrons from one atom to another is called:

Which one of the following sub shell is filled after filling of 3p sub shell?

Solubility of sodium chloride in 100g of water at room temperature is:

Identify the isotope used as a Tracer in diagnosing Thyroid problem:

Which of the following molecules obey the duplet rule?

Which term is same for one mole of oxygen gas and one mole of water?

At constant temperature, on increasing the pressure on a gas, the distance between molecules:

Galvanizing is:

How many atoms are there in 28 g of N₂ gas?

What is the mass of FOUR moles of Hydrogen (H₂) gas?

How many atoms are there in 0.1 moles of Carbon?

The branch of chemistry that deals with laws and theories to understand the structure and changes of matter is called:

Which one of the following elements belongs to Group III-A of the periodic table?

Water boils at ______ in a pressure cooker.

The aqueous solutions of ionic compounds conduct electricity due to:

A sub-shell that can accommodate 10 electrons is:

Which of the following isotopes is used to trace the flow of blood and detect possible constrictions or obstructions in the circulatory system?

Which is the property of crystalline solid?

Which of the following ions, Chlorine cannot oxidize?

Consider the following reaction:
CuO + H₂  →  Cu + H₂O
In this reaction CuO behaves as:

In the formation of AlF₃, how many electron(s) are lost by an Aluminum atom?

Which one is heterogeneous mixture?

Identify the branch of chemistry which deals with study of glucose formation by plants:

Galvanizing is:

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Number of periods in the periodic table are:

Identify the isotope of Uranium used in nuclear reactors:

Total number of shared electrons in a molecule of CO₂ are:

Alloy are an example of:

The oxidation state of “Cr” in K₂Cr₂O₇ is:

Which quantity is same for one mole of Hydrogen gas and one mole of water?

The atomic radius of an atom _________ as one move from top to bottom in a group of periodic table.

The period number of Phosphorus is:

Which of the following is NOT a compound?

Predict the location of \(_{13}^{27}\textrm{Al}\) in Periodic table:

²³⁵U₉₂ is used in atomic bombs, the number of neutrons present in this isotope of Uranium is:

A compound with chemical formula BaSX₄ has a formula mass of 233 amu. The atomic mass of the element X is:

Na has _______ electronic configuration.

Which of the following is not an electrolyte?

A student mixed a solute in a solvent and made a mixture. After 15 minutes, he/she observed that solute has settled down. He/she will call this mixture as:

If one mole of ‘Na’ contains ‘x’ atoms of Sodium, what is the number of atoms contained in 46g of Sodium?

The oxidation state of “S” in S₂Cl₂ is:

Conversion of a liquid into a gas at all temperature is called:

In which of the following processes speed of particles decrease?

The elements that can exist in two or more different arrangements of atoms are called:

The oxidation state of B in H₃BO₃ is:

A liquid boils when its vapour pressure becomes equal to:

Mass of 2 moles of hydrogen gas is:

How many atoms are there in 1.25 moles of Zinc?

Which of the following solids is amorphous?

The covalent bond is formed by:

If you move from left to right in a period of periodic table, which of the following will NOT change?

Group number of aluminum is:

Which of the following is the opposite of melting?

Galvanizing is:

Fermentation of cane sugar produces ______ v/v of ethyl alcohol called rectified spirit.

The quantity of solute in a given amount of solvent is called:

What is the formula mass of CaCl₂?

Which of the following property of halogens is maximum among the members of their period?

The escape of molecules of a gas through a small hole one after the other is called:

Melting point of Sodium is:

The equation V/T = Constant is the mathematical expression of:

An aqueous solution can dissolve 25 g of a solid at 25°C. If someone dissolves 20g of this solid in water at 25°C then this solution will be called:

How many moles of Na atoms are present in 2.3g of Sodium?

Which of the following is the Empirical formula of Benzene?

Which of the following is the strongest acid?

Acetone melts at – 94°C and boils at 56°C. What is the physical state of Acetone at 25°C and 1 atm?

Bromine has a melting point of – 7°C and a boiling point of 59°C. What is the physical state of Bromine at 100°C?

A liquid boils when its vapour pressure becomes equal to:

Which of the following molecules have a triple covalent bond?

Which one of the following molecules has a non-polar covalent bond?

The number of neutrons in ²⁷M₁₃ is:

Which of the element of the 3rd period has highest electronegativity?

The volume of a 0.5 M solution of hydrochloric acid containing its 2 moles is:

Which of the following is not the unit of pressure?

Identify the pair of molecules having double covalent bonds:

Which term is same for one mole of hydrogen and one mole of water?

Which of the following elements belongs to VIII-A group?

How many moles of molecules are there in 16 g of Oxygen gas?

Number of periods in the periodic table are:

Identify covalent compounds:

The direct conversion of a solid into vapours is called:

The oxidation state of Hydrogen in metal hydride is?

Which of the following is a component of air responsible for greenhouse effect?

How many grams of O₂ are present in a container having 3×10²³ molecules? (Atomic mass O=16)

A solution of NaOH has a concentration of 4g/ dm³. What is the mass of NaOH contained in 250 cm³ of this solution?

Which of the following solution is more dilute?

Which of the following groups contain alkaline earth metals?

A solution of KOH has concentration 56 g/dm³. What is the mass of KOH contained in 500cm³ of this solution?

Predict which halogen can displace chlorine from aqueous solution of potassium chloride:

Charle’s law can be stated / represented as:

M shell has subshells:

Which of the following elements belongs to group VIII A?

Which of the following substances in the given reaction is being reduced:
ZnO+H₂→Zn+H₂O

A chemist dissolves 15g of NaCl in 85g of H₂O. This solution is:

Chloride ion can not oxidize ______ ion.

Consider the following reaction:
H₂S+Cl₂→2HCl+S
Which of the following statement is true about above reaction?

The correct electronic configuration of Mg is:

Which of the following atoms obeys Duplet rule?

Which of the following substance is sublimate?

At Mount Everest, what is the boiling point of water?

Oxidation number of Mn is KMnO₄ is:

The branch of chemistry that deals with substances containing carbon is called:

Which substance does not have an ionic bond?

Atomic numbers were discovered by:

Which of the following isotopes is used to trace the flow of blood and detect possible constrictions or obstructions in the circulatory system?

Which of the following is an amphoteric oxide?

Number of neutrons in ²⁷M₁₃  is ________.

When Arshad dissolves 28 g of KOH in one dm³ of water. Its molarity will be:

What is the formula mass of CuSO₄.5H₂O?
(Cu=63.5, H=1, O=16, S=32)

The increase in ionization energy from left to right in a period is due to:

Silicon belongs to group IV A. It has _______ electrons in the valence shell.

A solution of NaOH has a concentration of 4g/ dm³. What is the mass of NaOH contained in 250 cm³ of this solution?

A solution of NaOH contains 30 g of this compound in 1.5 dm³ of solution. What is the Molarity of this solution?

Oxidation state/number of ‘Cr’ in K₂Cr₂O₇ is:

Which of the following is a covalent compound?

Consider the given reaction:
H₂S + Cl₂   →  2 HCl + S
In the above reaction, H₂S behaves as a/an ________.