Class 9 Chemistry Grand MCQs Tests Past Papers

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

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

M shell has subshells:

Particles size of colloids vary from:

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

The number of neutrons in an atom ²³M₁₁ is:

The period number of Phosphorus is:

The elements of groups IIIA-VIIIA are called:

Which of the following groups contain alkaline earth metals?

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

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

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

Which of the following solution is more dilute?

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

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

What is the formula mass of CaCl₂?

The oxidation state of “S” in S₂Cl₂ is:

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

Which of the following elements has a greater shielding effect?

What is used to manufacture urea?

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

Which of the following ions, Chlorine cannot oxidize?

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

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

Which of the following is NOT a compound?

Which of the following is the most basic oxide?

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

Mass of 2 moles of hydrogen gas is:

Which of the following is not the unit of pressure?

Which of the following is not an electrolyte?

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

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

Which is NOT a property of crystalline solids?

Galvanizing is:

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

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?

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

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

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

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

Rutherford used ________ particles in his experiment.

Which of the following metals is the least reactive metal?

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

Which is the property of crystalline solid?

How many atoms are there in 0.1 moles of Carbon?

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

The oxidation state of in N in NH₃ is:

Which of the following elements has greater shielding effect?

Consider the following table:

Which of the following relationship does this table represent?

The oxidation state of Fe in Fe₂O₃ is:

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 of the following elements belongs to VIII-A group?

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

All the halogens react with metals to form salts called:

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

In which of the following processes speed of particles decrease:

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

Which of the following molecules obey the duplet rule?

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

Galvanizing is:

Chloride ion can not oxidize ______ ion.

A sub-shell that can accommodate 10 electrons is:

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

Identify covalent compounds:

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

Which of the following is the Empirical formula of Benzene?

How many atoms are there in 1.25 moles of Zinc?

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

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

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

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

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Number of periods in the periodic table are:

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

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

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

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

The aqueous solutions of ionic compounds conduct electricity due to:

Gemstones are solutions of:

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

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

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

Which of the following atoms obeys the duplet rule?

The oxidation number of Cr in Cr₂O₃ and K₂Cr₂O₇ are:

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

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:

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 elements will gain one electron to complete its octet?

The tendency of a metal to lose electrons is called:

Galvanizing is:

Group number of aluminum is:

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

Which of the following elements belongs to group VIII A?

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?

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

Which of the following substance has an ionic bond?

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

A liquid boils when its vapour pressure becomes equal to:

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

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

Identify the ionic compound from the given options:

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

Identify the metal used as a catalyst in contact process:

The oxidation state of B in H₃BO₃ is:

A liquid boils when its vapour pressure becomes equal to:

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

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

Alloy are an example of:

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

Identify the covalent compound.

The number of neutrons in ²⁷M₁₃ is:

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

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

Which of the following does not involve electrolytic process?

A liquid boils when the vapour pressure becomes equal to:

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

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

Which one is heterogeneous mixture?

The oxidation state of “Cr” in K₂Cr₂O₇ is:

Identify the isotope of Uranium used in nuclear reactors:

The oxidation number of Boron B. in H₃BO₃ is:

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

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

Melting point of Sodium is:

Which of the following molecules have a triple covalent bond?

Which of the following oxides is the most basic oxide?

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

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

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

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

The empirical formula for caffeine (C₈H₁₀N₄O₂) is:

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

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

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

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

Which of the following solids is amorphous?

Identify the pair of molecules having double covalent bonds:

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

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?

In Halogens, the order of decreasing oxidizing power is:

A liquid boils when its vapour pressure becomes equal to:

0.25 moles of SO₂ will contain:

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

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

Which of the following halogens has lowest electronegativity?

Water boils at ______ in a pressure cooker.

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

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

The oxidation state of Hydrogen in metal hydride is?

The covalent bond is formed by:

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

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

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

Which of the following ions burns with brick red flame?

Na has _______ electronic configuration.

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

The correct electronic configuration of Mg is:

The Oxidation number of ‘N’ in HNO₃ is:

Which compound acts as a fixer in photography?

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

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:

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

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

Arrangement of electrons in subshells is done by using:

A liquid boils when its vapour pressure becomes equal to:

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

Which of the following is the opposite of melting?

In which group are halogen elements present?

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

Number of periods in the periodic table are:

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]

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

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

In which of the following processes speed of particles decrease?

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

The direct conversion of a solid into vapours is called:

Identify the element which has the largest atomic radius.

Which of the following oxides is the most basic oxide?

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

Which products are formed by the electrolysis of molten NaCl?

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

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

Which isotope is used to irradiate cancer cells?

Gain of electrons and loss of oxygen is called:

Which of the following is the strongest acid?

Mention the amphoteric oxide out of given oxides.

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

Charle’s law can be stated / represented as:

Which metal is used to make filaments of electric bulb?

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

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

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

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?

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

Which of the following element is most metallic?

Rutherford used _____________ particles in his experiment.

Value of Plank’s constant is:

Oxidation state of Cr in K₂Cr₂O₇ is:

Which of the following is a covalent compound?

What is the mass of Carbon present in 44 g of CO₂?

Which isotope is used in nuclear reactors?

Which substance is NOT covalent?

Which of the following is Milk of Magnesia?

M shell has _____ subshells.

Consider the following table:

Which of the following relationship does this table represent?

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

Which one of the following substances is not a sublimate?

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

SO₂ is ___________ oxide.

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

The horizontal rows of the periodic table are called:

Which of the following is a molecular ion?

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

Which one of the following obeys Duplet rule?