Class 10 Chemistry MCQs Tests

Ammonia is produced by the reaction of nitrogen and hydrogen at 450 °C, 200 atm pressure in the presence of a catalyst. The process is known as:

Concentration of reactants and products at equilibrium remains unchanged if:

Which of the following catalysts is used to form NH₃ gas from Nitrogen and Hydrogen gas?

________ and _________ are main gases of the air.

Which is true about the equilibrium state?

A double arrow (⇌) indicates:

Active mass means:

Which of the following is not the macroscopic characteristic of forward reaction?

Sulphuric acid is produced on the large scale by the process known as:

When a mixture of H₂ and I₂ is sealed in a flask and temperature is kept at 25°C, following equilibrium is established.
H_{2 (g)} + I_{2 (g)} ⇌ 2HI _(g)

Which substance or substances will be present in the equilibrium mixture?

For a reversible reaction:
Kc = [C]² / [A][B]  .

The correct equation for above expression is:

For a general reaction

2A + B ⇌ 2C + D.

The rate of forward reaction will be equal to:

What is the unit of equilibrium constant for N_{2 (g)} + O_{2 (g)} ⇌ 2NO _(g)?

Sulphur Trioxide is prepared according to the following reaction:

2SO_{2 (g)} + O_{2 (g)} ⇌ 2SO_{3 (g)}

The condition of this reaction is:

Fe / 400 °C , 200 atm

At equilibrium state of a reversible reaction:

Which of the following reaction will not have any units for Kc?

2A _(g) + B _(g) ⇌ 3AC _(g)

What is the unit of equilibrium constant for N_{2 (g)} + 2O_{2 (g)} ⇌ 2NO_{2 (g)}?

In an irreversible reaction, equilibrium is:

Active mass means:

Which is true about the equilibrium state?

When a mixture of H₂ and I₂ is sealed in a flask and temperature is kept at 25°C, following equilibrium is established.
H_{2 (g)} + I_{2 (g)} ⇌ 2HI _(g)

Which substance or substances will be present in the equilibrium mixture?

Which of the following is not the macroscopic characteristic of forward reaction?

A double arrow (⇌) indicates:

Which of the following catalysts is used to form NH₃ gas from Nitrogen and Hydrogen gas?

Concentration of reactants and products at equilibrium remains unchanged if:

________ and _________ are main gases of the air.

Sulphuric acid is produced on the large scale by the process known as:

Ammonia is produced by the reaction of nitrogen and hydrogen at 450 °C, 200 atm pressure in the presence of a catalyst. The process is known as:

Which of the following is a Lewis base?

What is the colour of methyl red in basic solution?

KW is called ionization constant of water. Its value can be obtained by:

What is the colour of phenolphthalein in acidic medium?

Which of the following cannot be classified as Arrhenius acid?

The gastric juice has pH=1. It means a:

Acid rain has pH less than:

Which of the following acids is used in the manufacturing of many chemicals, drugs, dyes, paints and explosives?

At what pH does Phenolphthalein change its colour?

Colour of methyl red in solution of pH=9 is:

Green colour in firework is produced by the use of:

A drain cleaner solution contains 1.0 × 10^-8 M, OH^- concentration. This solution is:

NH₃ cannot be classified as a base by:

Consider the following reaction, H₂O + HCl ⇌ H₃O⁺ + Cl^-, which species is an electron pair acceptor in this reaction?

In the following reaction which species is donating an electron pair?
NH₃ + BF₃ → H₃N-BF₃

The pH of Lemon juice is '2’. The H⁺ ion concentration [H⁺] in the lemon juice is:

_________ is used to make liquid soap and shaving cream.

When [H⁺] < 1 × 10^-7 M, then solution will be:

What is the particular pH range at which potatoes grow?

Which of the following is a Lewis base?

What is the particular pH range at which tomatoes grow?

Which of the following acids is used in the manufacturing of fertilizers and explosives?

Which substance is used as antacid and laxative?

The optimum pH range of a swimming pool is:

What is the particular pH range at which onions grow?

Which of the following acid is used for cleaning of metals, bricks and removing scale from boilers?

_________ is used to make mortar, plasters and cement.

What is the particular pH range at which carrots grow?

What is the particular pH range at which apples grow?

What is the concentration of 𝐻⁺ ion in the milk of magnesia?

Milk of magnesia neutralizes excess stomach acid, which salt is formed in this reaction?

Choose Lewis acid:

What is the colour of phenolphthalein in basic medium?

The main component of gastric juice in the stomach is:

Chemical formula of Soda ash is:

Ammonia is a base because it:

What is the colour of methyl red in acidic medium?

At what pH does methyl red change its colour?

Pitch is produced by:

Formic acid contains functional group:

Phenol gives _______ ppt with bromine water.

__________ is used for artificial ripening of fruits.

In which of the following hydrocarbons, oxygen is attached to two alkyl groups?

Which of the following is a heterocyclic compound?

The general formula of alkane is:

Which of the following is a homocyclic compound?

If an alkane is having '5’ carbon atoms then the number of Hydrogen atoms in this alkane will be:

Which coloured solution is produced, when Ketones are mixed with alkaline sodium nitro-prusside solution?

A series of related compounds in which any two adjacent molecules differ by -CH₂- group is called _______ series.

Which of the following is the general formula of Ether?

Aldehyde gives _______ precipitate with Fehling’s solution.

The part of the name of an organic compound that tells the number of carbon atoms in the chain is called:

__________ is used as a solvent for fats, oils, paints and varnishes.

Destructive distillation of coal gives:

Self-linking ability of carbon is called:

What is the structural formula of Pyridine?

The IUPAC name has _____ parts.

The suffix in the name of an organic compound tells the:

n-pentane: iso-pentane and neo pentane are having different:

Compound of _________ helps to ensure antiseptic conditions in hospitals operating rooms.

Which of the following is an Ether?

Which of the following is the functional group of amine?

The general formula of alkynes is:

Which compound is not a saturated hydrocarbon?

Stem "But" stands for how many carbon atoms?

The general formula for Amines is:

Which is an alcohol?

The functional group \begin{matrix} O\quad \\ ||\quad \\ \begin{matrix} - & C & - \end{matrix}H \end{matrix} is found in:

Which of the following is a homocyclic compound?

Phenol gives _______ ppt with bromine water.

The general formula of alkane is:

The functional group \begin{matrix} O\quad \\ ||\quad \\ \begin{matrix} - & C & - \end{matrix}H \end{matrix} is found in:

In which of the following hydrocarbons, oxygen is attached to two alkyl groups?

Which of the following is a heterocyclic compound?

The general formula for Amines is:

Stem "But" stands for how many carbon atoms?

If an alkane is having '5’ carbon atoms then the number of Hydrogen atoms in this alkane will be:

Compound of _________ helps to ensure antiseptic conditions in hospitals operating rooms.

Pitch is produced by:

n-pentane: iso-pentane and neo pentane are having different:

Which coloured solution is produced, when Ketones are mixed with alkaline sodium nitro-prusside solution?

__________ is used for artificial ripening of fruits.

Formic acid contains functional group: