Class 9 Chemistry Grand MCQs Tests Past Papers

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

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

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

Which of the following metals is the least reactive metal?

How many atoms are there in 1.25 moles of Zinc?

The oxidation state of “Cr” in K₂Cr₂O₇ is:

Identify the covalent compound.

The oxidation number of Cr in Cr₂O₃ and K₂Cr₂O₇ are:

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

What is the formula mass of CaCl₂?

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

Which one is heterogeneous mixture?

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

Which of the following halogens has lowest electronegativity?

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

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

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

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

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:

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

M shell has subshells:

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

Group number of aluminum is:

Which of the following is the Empirical formula of Benzene?

Which products are formed by the electrolysis of molten NaCl?

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

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

Which of the following elements has greater shielding effect?

0.25 moles of SO₂ will contain:

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

A liquid boils when its vapour pressure becomes equal to:

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

Identify the element which has the largest atomic radius.

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

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

The oxidation number of Boron B. in H₃BO₃ is:

What is used to manufacture urea?

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

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

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

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

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

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

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

The oxidation state of “S” in S₂Cl₂ is:

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

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

The oxidation state of Hydrogen in metal hydride is?

The tendency of a metal to lose electrons is called:

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

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

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

Identify the isotope of Uranium used in nuclear reactors:

Charle’s law can be stated / represented as:

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

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

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 elements belongs to VIII-A group?

Mass of 2 moles of hydrogen gas is:

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

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

Number of periods in the periodic table are:

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

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

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

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

In which of the following processes speed of particles decrease:

Water boils at ______ in a pressure cooker.

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

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

Which of the following oxides is the most basic oxide?

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

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

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

Which of the following ions, Chlorine cannot oxidize?

Chloride ion can not oxidize ______ ion.

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

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:

The oxidation state of in N in NH₃ is:

Which of the following elements has a greater shielding effect?

Which of the following oxides is amphoteric oxide?

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

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

Which of the following ions burns with brick red flame?

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

A liquid boils when the vapour pressure becomes equal to:

Which is NOT a property of crystalline solids?

In which of the following processes speed of particles decrease?

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

Particles size of colloids vary from:

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

Which of the following oxides is the most basic oxide?

Which of the following is NOT a compound?

Which of the following molecules obey the duplet rule?

The direct conversion of a solid into vapours is called:

The number of neutrons in an atom ²³M₁₁ is:

Gain of electrons and loss of oxygen is called:

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

Identify covalent compounds:

Which metal is used to make filaments of electric bulb?

Which of the following groups contain alkaline earth metals?

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

Which compound acts as a fixer in photography?

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

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

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?

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

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

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

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Number of periods in the periodic table are:

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

In which group are halogen elements present?

The period number of Phosphorus is:

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

Which of the following atoms obeys the duplet rule?

Which of the following is the most basic oxide?

How many atoms are there in 0.1 moles of Carbon?

Identify the ionic compound from the given options:

Which of the following elements belongs to group VIII A?

Which of the following is the opposite of melting?

All the halogens react with metals to form salts called:

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

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

The aqueous solutions of ionic compounds conduct electricity due to:

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

The number of neutrons in ²⁷M₁₃ is:

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

Arrangement of electrons in subshells is done by using:

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

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

The elements of groups IIIA-VIIIA are called:

The oxidation state of B in H₃BO₃ is:

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

Na has _______ electronic configuration.

Which of the following is not the unit of pressure?

Which is the property of crystalline solid?

The Oxidation number of ‘N’ in HNO₃ is:

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

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

A liquid boils when its vapour pressure becomes equal to:

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

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

A liquid boils when its vapour pressure becomes equal to:

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

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

Which of the following solution is more dilute?

Galvanizing 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]

Galvanizing is:

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

The covalent bond is formed by:

A liquid boils when its vapour pressure becomes equal to:

Gemstones are solutions of:

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

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

Which of the following does not involve electrolytic process?

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

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

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

Which of the following is not an electrolyte?

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

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

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

Which of the following molecules have a triple covalent bond?

Rutherford used ________ particles in his experiment.

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

The empirical formula for caffeine (C₈H₁₀N₄O₂) is:

Which of the following substance has an ionic bond?

Identify the metal used as a catalyst in contact process:

Which of the following solids is amorphous?

Galvanizing is:

Melting point of Sodium is:

Which isotope is used to irradiate cancer cells?

The oxidation state of Fe in Fe₂O₃ is:

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

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

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

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

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

The correct electronic configuration of Mg is:

Mention the amphoteric oxide out of given oxides.

In Halogens, the order of decreasing oxidizing power is:

A sub-shell that can accommodate 10 electrons is:

Alloy are an example of:

Identify the pair of molecules having double covalent bonds:

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

Consider the following table:

Which of the following relationship does this table represent?

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

Which of the following is the strongest acid?

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

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

Vegetable oil is converted into vegetable ghee by passing H₂ gas through the oil. In this process which of the following elements is used as a catalyst?

Which one of the following substances is not a sublimate?

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

Which isotope is used in nuclear reactors?

Atomic numbers were discovered by:

The horizontal rows of the periodic table are called:

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

Which of the following element is most metallic?

Which of the following is Milk of Magnesia?

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

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

Which of the following substance is sublimate?

How many elements were known by the end of the 18^th century?

Which one is the correct electronic configuration according to Auf Bau Principle?

Oxidation state of Cr in K₂Cr₂O₇ is:

The number of moles in 46 g of Sodium (Na) will be?

Relationship “PV=Constant” represents:

Period number of Phosphorus in Periodic table is: