Class 9 Chemistry Past Papers MCQs Grand Practice Test

A liquid boils when its vapour pressure becomes equal to:

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?

The direct conversion of a solid into vapours is called:

A liquid boils when its vapour pressure becomes equal to:

The empirical formula for caffeine (C₈H₁₀N₄O₂) is:

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

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

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

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

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]

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?

Galvanizing is:

How many atoms are there in 0.1 moles of Carbon?

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

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

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

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?

The period number of Phosphorus is:

0.25 moles of SO₂ will contain:

Which of the following ions, Chlorine cannot oxidize?

The aqueous solutions of ionic compounds conduct electricity due to:

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

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

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

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:

How many atoms are there in 1.25 moles of Zinc?

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

Identify the covalent compound.

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

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

Gain of electrons and loss of oxygen is called:

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

The oxidation state of Hydrogen in metal hydride is?

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

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

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

Which of the following oxides is amphoteric oxide?

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

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

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

The covalent bond is formed by:

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

The oxidation state of B in H₃BO₃ is:

Identify the metal used as a catalyst in contact process:

The correct electronic configuration of Mg is:

In which of the following processes speed of particles decrease?

M shell has subshells:

Galvanizing is:

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

Which of the following elements has greater shielding effect?

Which of the following oxides is the most basic oxide?

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

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 is the opposite of melting?

In which group are halogen elements present?

Identify the element which has the largest atomic radius.

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

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

Rutherford used ________ particles in his experiment.

Which of the following molecules obey the duplet rule?

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

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

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

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 elements belongs to VIII-A group?

Consider the following table:

Which of the following relationship does this table represent?

Which of the following metals is the least reactive metal?

Which of the following substance has an ionic bond?

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 elements has a greater shielding effect?

Which of the following is the Empirical formula of Benzene?

Which of the following groups contain alkaline earth metals?

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

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?

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

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

Which of the following atoms obeys the duplet rule?

Particles size of colloids vary from:

Which of the following elements belongs to group VIII A?

The Oxidation number of ‘N’ in HNO₃ is:

Chloride ion can not oxidize ______ ion.

A liquid boils when its vapour pressure becomes equal to:

Which of the following is not the unit of pressure?

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

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

Mention the amphoteric oxide out of given oxides.

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

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

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

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 of the following is the most basic oxide?

Melting point of Sodium is:

Which metal is used to make filaments of electric bulb?

The number of neutrons in an atom ²³M₁₁ is:

Galvanizing is:

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:

Which of the following solids is amorphous?

Which is the property of crystalline solid?

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

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

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

The number of neutrons in ²⁷M₁₃ is:

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

The tendency of a metal to lose electrons is called:

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

Which of the following does not involve electrolytic process?

The oxidation number of Boron B. in H₃BO₃ is:

Which of the following ions burns with brick red flame?

Water boils at ______ in a pressure cooker.

Alloy are an example of:

Which one is heterogeneous mixture?

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

Which of the following molecules have a triple covalent bond?

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

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

Which of the following is Milk of Magnesia?

The correct electronic configuration of an atom having atomic number ‘13’ 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 atoms obeys Duplet rule?

Oxidation number of Mn is KMnO₄ is:

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

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

M shell has _____ subshells.

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?

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

Galvanizing is coating with _________.

Which substance is NOT covalent?

Period number of Phosphorus in Periodic table is:

Which of the following is Sublime?

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

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

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

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

Which of the following elements has greater shielding effect?

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

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

Which of the following is a molecular ion?

Which of the following is a covalent compound?

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

Al₂O₃ is an example of ________ oxide.

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

Which of the following is an amphoteric oxide?

The melting point of Sodium Chloride is:

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

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

Which of the following substance is sublimate?

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

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

Which substance does not have an ionic bond?

A liquid boils when its vapour pressure is __________.

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:

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

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

SO₂ is ___________ oxide.

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

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

Rutherford used _____________ particles in his experiment.

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

Which of the following solutions is more dilute?

Consider the following table:

Which of the following relationship does this table represent?

‘V ∝  T’ Relationship represents:

Number of neutrons in ²⁷M₁₃  is ________.

What is the mass of 4 moles of Hydrogen gas?

Value of Plank’s constant is:

Which one of the following substances is not a sublimate?

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

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:

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

Oxidation state of Cr in K₂Cr₂O₇ is:

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

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

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

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

Atomic numbers were discovered by:

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

Which of the following element is most metallic?

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

Which one of the following obeys Duplet rule?

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

Relationship “PV=Constant” represents: