Class 10 Chemistry Past Papers MCQs Grand Practice Test

Consider the following reaction,
\(H_{ 2 }O+HCl\rightleftharpoons { H }_{ 3 }{ O }^{ + }+{ Cl }^{ - }\) ,
which species is an electron pair acceptor in this reaction?

At equilibrium state of a reversible reaction:

Complete the following reaction:
\(CH\equiv CH+{ H }_{ 2 }\xrightarrow [ Ni ]{ 200-300^{ O }C } \) _____________

Which of the following is an aldehyde?

Baeyer’s test is used to detect the presence of:

Which process produces an alkane?

By dehydration, we mean the removal of:

Which scientist proposed the law of mass action?

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

The linkage which joins two amino acids is called:

Which of the following is a water soluble vitamin?

Which is used for dehydro-halogenation?

Which of the following is not a source of starch?

What is the unit of equilibrium constant for
\({ N }_{ 2 }+{ O }_{ 2 }\rightleftharpoons 2N{ O }_{ 2 }\)

Which of the following is used to remove permanent hardness in water?

Percentage of nitrogen in urea is:

The general formula of alkynes is:

Which gas has lowest percentage in the air?

\({ K }_{ w }\) is called ionization constant of water. Its value can be obtained by:

What is the percentage of Nitrogen in Ammonium sulphate \({ (NH }_{ 4 })_{ 2 }{ SO }_{ 4 }\)?

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

Sulphur Trioxide is prepared according to the following reaction:
\(2SO_{ 2(g) }+O_{ 2(g) }\rightleftharpoons 2S{ O }_{ 3(g) }\)
The condition of this reaction is:

Which one of the following vitamins is fat soluble?

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

The pH of Lemon juice is ‘2’. The \({ H }^{ + }\) ion concentration \({ H }^{ + }\) in the lemon juice is:

Most of air pollution is caused by:

Which of the following is an Ether?

The emission of 𝐶𝑂, 𝑁𝑂 and unburned hydrocarbons can be reduced by using:

The substance which fight against diseases in living organisms are:

Which of the following layers contains ozone gas?

Which of the following is used as Antacid?

Reduction of Ethylchloride (\({ C }_{ 2 }{ H }_{ 5 }Cl\)) produces.

Stem "But" stands for how many carbon atoms?

The unit of Kc for a reaction with equal number of moles of reactants & products is:

Which is used for dehydrohalogenation of Alkyl halides?

Ice floats over liquid water because:

Which of the following is evolved during the ripening of fruits and vegetables?

Which of the following reacts explosively with methane?

Glucose is:

Raffinose (\({ C }_{ 18 }{ H }_{ 32 }{ O }_{ 16 }\)) on hydrolysis forms ______ simple sugars.

Pitch is produced by:

Which of the following is the chemical formula of Haematite?

Which of following reacts with concentrated alkaline KMn\({ O }_{ 4 }\) to produce oxalic acid?

Which of the following is used as raw material for Solvay process?

Which is an alcohol?

Which one of the followings is insoluble in water?

Addition of Hydrogen in the vegetable oil is due to presence of:

In an irreversible reaction equilibrium is:

Highest temperature in Mesosphere is:

Formic acid contains functional group:

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

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

The functional group of Amines is

At what pH does Phenolphthalein change its colour?

Chalcopyrite is the ore of:

Which of the following substance reacts with to produce ethyleneglycol?

In the following reaction which species is donating an electron pair?
\({ NH }_{ 3 }+{ BF }_{ 3 }\rightarrow { H }_{ 3 }N-{ BF }_{ 3 }\)

Identify the compound responsible for acid rain:

The atmospheric layer that has the temperature range of −5 °C to −93°C is:

The gastric juice has pH= 1 It means a ___________________ solution.

Which compound is not a saturated hydrocarbon?

Galena is the ore of _________ metal.

What per cent of alkaline aqueous solution of \(KMnO_{ 4 }\) is used to detect the presence of an Alkene?

By dehydration we mean the removal of:

Which of the following is not a water borne disease?

What are the units of Kc for
\( { N }_{ 2(g) }+{ O }_{ 2(g) }\rightleftharpoons 2{ N }{ O }_{ 2(g) } \)?

Green colour in firework is produced by the use of: (Example 10.4 P-35)

The formula of ammonium carbamate is:

Kwashiorkor is a disease caused by an extreme lack of:

A drain cleaner contains 1.0 × \({ 10 }^{ -8 }\)M, \({ OH }^{ - }\) concentration, this solution is:

Which product is obtained when chloromethane (or methyl chloride) is reduced?

Disorders of Red blood cells is caused due to the deficiency of:

___________ is used to make rectified spirit by fermentation process

Which of the following is a heterocyclic compound?

On boiling temporary hard water, the substance which is settled down is:

Formic acid contains functional group:

The disease caused due to the deficiency of Vitamin D is:

Chemical formula of ammonium carbamate is:

The density of water is maximum at:

Which of the following is a Lewis acid?

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

_________ is used to make liquid soap and shaving cream.

Which of the following is a homocyclic compound?

Which of the following is used for dehydrohalogenation of alkyl halides?

Which of the following does not happen, when a system is at equilibrium state?

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

A drain cleaner solution contains 1.0 × \({ 10 }^{ -8 }\)M, \({ OH }^{ - }\) concentration. This solution is:

Which of the following is used as raw material for preparation of urea?

Fehling’s solution is used to determine the presence of:

Halite is an ore of:

__________ is used for artificial ripening of fruits.

Which process produces an alkane?

Plants convert glucose into:

Which of the following is used for ripening of fruits?

Which of the following acids is found in Butter?

Marble buildings and statues are destroyed by acid rain due to reaction of Sulphuric acid with:

Which of the following is a Lewis base?

What is the concentration of \({ H }^{ + }\) ion in the milk of magnesia?

Raffinose (\({ C }_{ 18 }{ H }_{ 32 }{ O }_{ 16 }\)) on hydrolysis forms ______ simple sugars.

What is the chemical formula of slaked lime?

Acid rain has pH less than:

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

In an irreversible reaction, equilibrium is:

Which of the following process is reduction in nature?

Which of the following is NOT a water-borne disease?

Identify molecule produced when electrical discharges pass through oxygen in air:

The general formula for Amines is:

Which of the following Salts causes temporary hardness in water?

For which reaction Kc has NO units?

Which substance is used as antacid and laxative?

A double arrow (\(\rightleftharpoons \)) indicates.

Formic acid contains _______ functional group.

Nitrogen dioxide is synthesized according to the given equilibrium.
\(2NO_{ (g) }+O_{ 2(g) }\rightleftharpoons 2N{ O }_{2 (g) }\)
The unit of Kc, for this reaction is:

In the following reaction which species is donating an electron pair?
\({ NH }_{ 3 }+{ BF }_{ 3 }\rightarrow { H }_{ 3 }N-{ BF }_{ 3 }\)

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

Raffinose (\({ C }_{ 18 }{ H }_{ 32 }{ O }_{ 16 }\)) is a:

Which of the following is responsible for acid rain?

Which product is obtained when chloromethane is reduced?

Formic acid contains functional group:

Which is reddish brown gas?

For a reversible reaction
\(K_{ C }=\frac { [HI]^{ 2 } }{ [{ H }_{ 2 }][{ I }_{ 2 }] } \)
which substance is product of the reaction?

What happens when ammonium carbamate is distilled with steam?

Which of the following cannot be classified as Arrhenius acid?

Which human activity results in contamination of water bodies?

Which of the following is an ore of Aluminum?

Phenol gives _______ ppt with bromine water.

Which of the following is a heterocyclic compound?

The volumetric ratio between hydrogen and oxygen in water is:

Raffinose (\({ C }_{ 18 }{ H }_{ 32 }{ O }_{ 16 }\)) is a:

Which of the following causes brain damage in children?

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

Which of the following is used as jet fuel?

Active mass means ____________.

The separation of mineral from gangue is called concentration. Which of the following methods is used for concentration?

The temperature inside a green house can be higher than the outside temperature.

Which of the following is used as domestic fuel?

Which of the following is not a waterborne disease?

What will happen if \([O{ H }^{ - }]\) increases?

Chemical formula of Slaked lime is:

Hydrogen is added to Propene according to the following equation:
\(C{ H }_{ 3 }CH={ CH }_{ 2 }+{ H }_{ 2 }\rightarrow { 200-300^{ O }C } { CH }_{ 3 }-{ CH }_{ 2 }-{ CH }_{ 3 }\)
Which of the following catalysts is used for this reaction?

Which of the following is a Lewis base?

Which is not a dextrose sugar?

Permanent hardness of water can be removed by:

Raffinose produces ______ units of simple sugars when hydrolyzed.

The reduction of alkyl halides takes place in the presence of:

Which of the followings is not a waterborne disease?

PbS is the formula of:

Which of the following diseases is caused due to the deficiency of vitamin-A?

Each DNA nucleotide consists of:

Which one is not an air pollutant?

Lowest temperature in stratosphere is:

The formula of Halite is:

Which process produces an Alkane?

Ultraviolet radiations are absorbed by ozone in the stratosphere, that is why:

For a general reaction 2A + B \(\rightleftharpoons \) 2C + D the rate of forward reaction will be equal to:

____________ causes breathing difficulties, asthma and eye irritation.

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

Consider the following reaction,
\(H_{ 2 }O+HCl\rightleftharpoons { H }_{ 3 }{ O }^{ + }+{ Cl }^{ - }\) ,
which species is an electron pair acceptor in this reaction?

For a reversible reaction Kc = \(\frac { { [C] }^{ 2 } }{ [A][B] } \) . The correct equation of above expression is:

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

When \(H^{ + }\) < 1 × [latex]10^{ -7 }[/latex] M, then solution will be:

Which of the following is the chemical formula of Gypsum?

Which of the following is a Lewis Base?

What is the colour of methyl red in basic solution?

Lowest temperature in stratosphere is:

What is the colour of phenolphthalein in acidic medium?

The word vitamin was first used by:

Which of the following is the functional group of amine?

For a reversible reaction K = \(\frac { { [C] }^{ 2 } }{ [A][B] } \) . The correct product of above expression is:

In the given reaction which species is donating an electron pair?
\({ NH }_{ 3 }+{ BF }_{ 3 }\rightarrow { H }_{ 3 }N-{ BF }_{ 3 }\)

__________ is used to manufacture urea fertilizer.

Which compound has two halogen atoms on adjacent carbon atoms?

\(N{ H }_{ 3 }\) cannot be classified as a base by:

The general formula of alkane is: