Class 9 Chemistry Past Papers MCQs Grand Practice Test

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:

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

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

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

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

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

Which of the following oxides is the most basic oxide?

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

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

0.25 moles of SO₂ will contain:

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 is a defect of Rutherford atomic model?

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

Which of the following is the opposite of melting?

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

The covalent bond is formed by:

Identify the element which has the largest atomic radius.

The period number of Phosphorus is:

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

In which group are halogen elements present?

The oxidation state of Hydrogen in metal hydride is?

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

The direct conversion of a solid into vapours is called:

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

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

Galvanizing is:

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

Which of the following oxides is amphoteric oxide?

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

Which of the following elements has greater shielding effect?

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

Identify the covalent compound.

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

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

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

The oxidation state of B in H₃BO₃ is:

In which of the following processes speed of particles decrease?

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

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?

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

A liquid boils when its vapour pressure becomes equal to:

The empirical formula for caffeine (C₈H₁₀N₄O₂) is:

Galvanizing is:

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

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

How many atoms are there in 1.25 moles of Zinc?

The correct electronic configuration of Mg is:

M shell has subshells:

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

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

Which of the following ions, Chlorine cannot oxidize?

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 molecules has triple covalent bond between its atoms?

Identify the metal used as a catalyst in contact process:

A liquid boils when its vapour pressure becomes equal to:

The aqueous solutions of ionic compounds conduct electricity due to:

How many atoms are there in 0.1 moles of Carbon?

Gain of electrons and loss of oxygen is called:

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

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

Which of the following elements belongs to group VIII A?

Consider the following table:

Which of the following relationship does this table represent?

Mention the amphoteric oxide out of given oxides.

Which of the following ions burns with brick red flame?

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

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

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

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

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

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

Rutherford used ________ particles in his experiment.

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

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

Water boils at ______ in a pressure cooker.

The tendency of a metal to lose electrons is called:

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

Which of the following does not involve electrolytic process?

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 number of Cr in Cr₂O₃ and K₂Cr₂O₇ are:

Which is the property of crystalline solid?

Which of the following molecules obey the duplet rule?

Which of the following is the most basic oxide?

Which of the following solids is amorphous?

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

Which of the following groups contain alkaline earth metals?

Which of the following substance has an ionic bond?

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

Which metal is used to make filaments of electric bulb?

Which of the following is the Empirical formula of Benzene?

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

The oxidation number of Boron B. in H₃BO₃ is:

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

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

A liquid boils when its vapour pressure becomes equal to:

Particles size of colloids vary from:

Which one is heterogeneous mixture?

Galvanizing is:

Alloy are an example of:

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

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

The number of neutrons in an atom ²³M₁₁ is:

Which of the following atoms obeys the duplet rule?

A liquid boils when its vapour pressure becomes equal to:

Which of the following elements has a greater shielding effect?

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

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

Which of the following metals is the least reactive metal?

The Oxidation number of ‘N’ in HNO₃ is:

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

Chloride ion can not oxidize ______ ion.

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

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

Which of the following is not the unit of pressure?

Which of the following molecules have a triple covalent bond?

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

The number of neutrons in ²⁷M₁₃ is:

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

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

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

Melting point of Sodium is:

Which of the following is a covalent compound?

Which substance is NOT covalent?

Which of the following elements has greater shielding effect?

What is the mass of 4 moles of Hydrogen gas?

Which of the following is NOT TRUE about the formation of Na₂S?

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

Value of Plank’s constant is:

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

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

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

Which of the following solutions is more dilute?

Which one of the following substances is not a sublimate?

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

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

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

NaCl forms a colorless cubic crystal. Which of the following has also the same cubic crystal as NaCl crystal?

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

In Aqua Regia, the ratio between HCl (Conc.) and HNO₃ (Conc.) is:

Which substance does not have an ionic bond?

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

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

Consider the following table:

Which of the following relationship does this table represent?

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

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

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 _______.

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

Valence shell electronic configuration of an element M (Atomic No 14) is:

Galvanizing is coating with _________.

A liquid boils when its vapour pressure is __________.

In chrome plating, the compound used as an electrolyte is:

Relationship “PV=Constant” represents:

Oxidation state of Cr in K₂Cr₂O₇ is:

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

Which of the following is a molecular ion?

Which of the following element is most metallic?

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

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?

‘V ∝  T’ Relationship represents:

The melting point of Sodium Chloride is:

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

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

The correct electronic configuration of an atom having atomic number ‘13’ is:

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

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

Which of the following sub-shells can accommodate 6 electrons?

Which of the following is an amphoteric oxide?

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?

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

Which of the following is Sublime?

Oxidation number of Mn is KMnO₄ is:

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

Al₂O₃ is an example of ________ oxide.

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

Rutherford used _____________ particles in his experiment.

M shell has _____ subshells.

Number of neutrons in ²⁷M₁₃  is ________.

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

Period number of Phosphorus in Periodic table is:

SO₂ is ___________ oxide.

The horizontal rows of the periodic table are called:

Which one of the following obeys Duplet rule?

Atomic numbers were discovered by:

Which of the following atoms obeys Duplet rule?

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

Which of the following substance is sublimate?