Class 9 Chemistry Grand MCQs Tests Past Papers

The Oxidation number of ‘N’ in HNO₃ is:

Which of the following elements has a greater shielding effect?

Which of the following elements belongs to group VIII A?

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

The oxidation state of Hydrogen in metal hydride is?

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

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

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

A liquid boils when its vapour pressure becomes equal to:

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

The period number of Phosphorus is:

Which one is heterogeneous mixture?

Melting point of Sodium is:

The covalent bond is formed by:

A liquid boils when its vapour pressure becomes equal to:

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

Mention the amphoteric oxide out of given oxides.

Which of the following halogens has lowest electronegativity?

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

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

Which of the following is not the unit of pressure?

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

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

Which of the following molecules obey the duplet rule?

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

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

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:

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

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

The empirical formula for caffeine (C₈H₁₀N₄O₂) is:

Which of the following substance has an ionic bond?

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

The tendency of a metal to lose electrons is called:

Identify the metal used as a catalyst in contact process:

Which of the following does not involve electrolytic process?

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

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

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 a group VIII-A element?

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

Mass of 2 moles of hydrogen gas is:

Consider the following table:

Which of the following relationship does this table represent?

All the halogens react with metals to form salts called:

The aqueous solutions of ionic compounds conduct electricity due to:

The oxidation number of Cr in Cr₂O₃ and K₂Cr₂O₇ are:

Which of the following metals is the least reactive metal?

Which metal is used to make filaments of electric bulb?

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

Which of the following is not an electrolyte?

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

Which of the following is the opposite of melting?

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

Galvanizing is:

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

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

Which of the following atoms obeys the duplet rule?

Chloride ion can not oxidize ______ ion.

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

Which compound acts as a fixer in photography?

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

Which of the following is the strongest acid?

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

The elements of groups IIIA-VIIIA are called:

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

The oxidation state of “Cr” in K₂Cr₂O₇ is:

In Halogens, the order of decreasing oxidizing power is:

Which of the following solids is amorphous?

Which products are formed by the electrolysis of molten NaCl?

Identify covalent compounds:

The oxidation state of “S” in S₂Cl₂ is:

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

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

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

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

Na has _______ electronic configuration.

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

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

Which of the following ions, Chlorine cannot oxidize?

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

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

A liquid boils when its vapour pressure becomes equal to:

The oxidation number of Boron B. in H₃BO₃ is:

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

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

Identify the element which has the largest atomic radius.

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

Which of the following solution is more dilute?

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

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

Group number of aluminum is:

Identify the covalent compound.

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

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

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

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:

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

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

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

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

Galvanizing is:

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

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

In which of the following processes speed of particles decrease?

In which group are halogen elements present?

Which of the following is the most basic oxide?

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

Rutherford used ________ particles in his experiment.

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

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

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

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

A liquid boils when the vapour pressure becomes equal to:

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

The oxidation state of Fe in Fe₂O₃ is:

What is the formula mass of CaCl₂?

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

The number of neutrons in an atom ²³M₁₁ is:

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

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

Gain of electrons and loss of oxygen is called:

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

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

A sub-shell that can accommodate 10 electrons is:

A liquid boils when its vapour pressure becomes equal to:

Water boils at ______ in a pressure cooker.

The number of neutrons in ²⁷M₁₃ is:

Number of periods in the periodic table are:

Which of the following elements has greater shielding effect?

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

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

Which is the property of crystalline solid?

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

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

Which is NOT a property of crystalline solids?

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

In which of the following processes speed of particles decrease:

Gemstones are solutions of:

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

Which of the following is NOT a compound?

Galvanizing is:

What is used to manufacture urea?

0.25 moles of SO₂ will contain:

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

Alloy are an example of:

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

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

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Number of periods in the periodic table are:

Identify the pair of molecules having double covalent bonds:

Arrangement of electrons in subshells is done by using:

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

Which isotope is used to irradiate cancer cells?

Which of the following oxides is the most basic oxide?

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

Identify the isotope of Uranium used in nuclear reactors:

The direct conversion of a solid into vapours is called:

Which of the following molecules have a triple covalent bond?

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

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

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

How many atoms are there in 1.25 moles of Zinc?

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

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

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

The correct electronic configuration of Mg 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?

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

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

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

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

M shell has subshells:

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 oxides is the most basic oxide?

Which of the following ions burns with brick red flame?

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

Particles size of colloids vary from:

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]

How many atoms are there in 0.1 moles of Carbon?

Which of the following groups contain alkaline earth metals?

The oxidation state of in N in NH₃ is:

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

Which of the following is the Empirical formula of Benzene?

Identify the ionic compound from the given options:

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

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

Charle’s law can be stated / represented as:

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 B in H₃BO₃ is:

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

Which of the following oxides is amphoteric oxide?

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

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

What is maximum amount of Sodium Acetate that can be dissolved in 100 g of water at 0°C?

The melting point of Sodium Chloride is:

Oxidation number of Mn is KMnO₄ is:

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

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

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

Which of the following is used as cathode in the Down’s cell?

The electron affinity increases from left to right along a period due to:

The number of moles in 54 g of water will be:

The horizontal rows of the periodic table are called:

Carbon has __________ isotopes.

Oxidation state of Cr in K₂Cr₂O₇ is:

Relationship “PV=Constant” represents:

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

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

A liquid boils when its vapour pressure is __________.

Which of the following is Milk of Magnesia?

Which of the following is a molecular ion?

Which of the following element is most metallic?