Class 9 Chemistry Grand MCQs Tests Past Papers

Which of the following atoms obeys the duplet rule?

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

Galvanizing is:

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

Identify the metal used as a catalyst in contact process:

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

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

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

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

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

Melting point of Sodium is:

Which isotope is used to irradiate cancer cells?

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?

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:

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

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

The direct conversion of a solid into vapours is called:

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

The correct electronic configuration of Mg is:

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

The oxidation state of “S” in S₂Cl₂ is:

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

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

Identify the isotope of Uranium used in nuclear reactors:

Which of the following molecules have a triple covalent bond?

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

Alloy are an example of:

M shell has subshells:

The empirical formula for caffeine (C₈H₁₀N₄O₂) is:

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

Which of the following oxides is amphoteric oxide?

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

Which products are formed by the electrolysis of molten NaCl?

Which of the following is the most basic oxide?

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

Which of the following is the strongest acid?

Which of the following elements belongs to group VIII A?

Water boils at ______ in a pressure cooker.

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

A liquid boils when its vapour pressure becomes equal to:

The oxidation number of Boron B. in H₃BO₃ is:

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

Galvanizing is:

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

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

Which of the following is not an electrolyte?

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

Which of the following oxides is the most basic oxide?

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

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

Number of periods in the periodic table are:

Which compound acts as a fixer in photography?

Which of the following is NOT a compound?

Which of the following solution is more dilute?

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

A liquid boils when its vapour pressure becomes equal to:

Which of the following elements has a greater shielding effect?

Which of the following is the Empirical formula of Benzene?

Which of the following ions burns with brick red flame?

Which of the following is the opposite of melting?

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

Particles size of colloids vary from:

0.25 moles of SO₂ will contain:

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

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

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

The oxidation state of “Cr” in K₂Cr₂O₇ is:

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

Identify the covalent compound.

A sub-shell that can accommodate 10 electrons is:

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

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

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

In which of the following processes speed of particles decrease?

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

The covalent bond is formed by:

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

Mass of 2 moles of hydrogen gas is:

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

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

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

Which of the following molecules obey the duplet rule?

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

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

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

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

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

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

Which of the following does not involve electrolytic process?

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

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 solids is amorphous?

The oxidation state of in N in NH₃ is:

The elements of groups IIIA-VIIIA are called:

The aqueous solutions of ionic compounds conduct electricity due to:

The period number of Phosphorus is:

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

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

Which of the following is not the unit of pressure?

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

In Halogens, the order of decreasing oxidizing power is:

The Oxidation number of ‘N’ in HNO₃ is:

Arrangement of electrons in subshells is done by using:

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

What is the formula mass of CaCl₂?

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

The number of neutrons in an atom ²³M₁₁ is:

Identify the ionic compound from the given options:

Group number of aluminum is:

Which one is heterogeneous mixture?

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

In which group are halogen elements present?

Consider the following table:

Which of the following relationship does this table represent?

Rutherford used ________ particles in his experiment.

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

How many atoms are there in 0.1 moles of Carbon?

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

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

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

A liquid boils when the vapour pressure becomes equal to:

Which of the following ions, Chlorine cannot oxidize?

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

How many atoms are there in 1.25 moles of Zinc?

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

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

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

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

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

Which is NOT a property of crystalline solids?

Identify the element which has the largest atomic radius.

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]

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

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

The oxidation state of Fe in Fe₂O₃ is:

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

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

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

Galvanizing is:

A liquid boils when its vapour pressure becomes equal to:

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Number of periods in the periodic table are:

Which of the following substance has an ionic bond?

Gain of electrons and loss of oxygen is called:

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

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

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

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

Which is the property of crystalline solid?

Which of the following elements has greater shielding effect?

Identify covalent compounds:

Which of the following metals is the least reactive metal?

Gemstones are solutions of:

The oxidation state of Hydrogen in metal hydride is?

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

Charle’s law can be stated / represented as:

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

All the halogens react with metals to form salts called:

The oxidation number of Cr in Cr₂O₃ and K₂Cr₂O₇ are:

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

Which of the following groups contain alkaline earth metals?

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

Identify the pair of molecules having double covalent bonds:

The tendency of a metal to lose electrons is called:

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:

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

What is used to manufacture urea?

Which of the following oxides is the most basic oxide?

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

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

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

The number of neutrons in ²⁷M₁₃ is:

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

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

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

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

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

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

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

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

Which metal is used to make filaments of electric bulb?

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

Chloride ion can not oxidize ______ ion.

The oxidation state of B in H₃BO₃ is:

Which of the following halogens has lowest electronegativity?

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

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

Na has _______ electronic configuration.

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

In which of the following processes speed of particles decrease:

A liquid boils when its vapour pressure becomes equal to:

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

Mention the amphoteric oxide out of given oxides.

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

Atomic numbers were discovered by:

Due to high ionization energies, which element do NOT lose electron?

Consider the following table:

Which of the following relationship does this table represent?

In the formation of AlF₃, Al atom loses _________ electrons.

Number of neutrons in ²⁷M₁₃  is ________.

‘V ∝  T’ Relationship represents:

Which substance does not have an ionic bond?

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

Which of the following is Milk of Magnesia?

SO₂ is ___________ oxide.

Which of the following element is most metallic?

If one mole of carbon contains x atoms, then what is the number of atoms contained in 12 g of Mg?

In chromium plating the H₂SO₄ is added to Cr₂(SO₄)₃ in order to:

In which group of the Periodic table is S present on the basis of electronic configuration?

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

Rutherford used _____________ particles in his experiment.

What is the oxidation state of Hydrogen in case of Metallic Hydrides?

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