Class 10 Chemistry Past Papers MCQs Grand Practice Test

Which gas has lowest percentage in the air?

__________ is used to manufacture urea fertilizer.

By dehydration we mean the removal of:

Formic acid contains functional group:

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

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

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

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

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

Which of the following is a heterocyclic compound?

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

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

Which is used for dehydrohalogenation of Alkyl halides?

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

Which of the following is responsible for acid rain?

The general formula of alkane is:

Chemical formula of Slaked lime is:

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

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

Stem "But" stands for how many carbon atoms?

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

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?

Percentage of nitrogen in urea is:

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

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

Which of the following substance reacts with to produce ethyleneglycol?

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:

Which of the following cannot be classified as Arrhenius acid?

Which of the following acids is found in Butter?

Which human activity results in contamination of water bodies?

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

Which is not a dextrose sugar?

Glucose is:

The formula of ammonium carbamate is:

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

Which of the following is the chemical formula of Haematite?

Which of the following is not a water borne disease?

Each DNA nucleotide consists of:

____________ causes breathing difficulties, asthma and eye irritation.

Chalcopyrite is the ore of:

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

The substance which fight against diseases in living organisms are:

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

Which of the following process is reduction in nature?

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

Which of the following is a Lewis base?

Which is an alcohol?

Which one is not an air pollutant?

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

Galena is the ore of _________ metal.

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

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

Permanent hardness of water can be removed by:

Pitch is produced by:

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

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

Which of the following reacts explosively with methane?

Which of the following is a Lewis Base?

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

Lowest temperature in stratosphere is:

Lowest temperature in stratosphere 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:

The functional group of Amines is

Which of the following is a Lewis acid?

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

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

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

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

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

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

Which of the following Salts causes temporary hardness in water?

Which of the following is used as jet fuel?

Which of the following is a water soluble vitamin?

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

Phenol gives _______ ppt with bromine water.

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

Kwashiorkor is a disease caused by an extreme lack of:

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

The density of water is maximum at:

The linkage which joins two amino acids is called:

Formic acid contains _______ functional group.

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

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

What is the colour of methyl red in basic solution?

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

Which of the following layers contains ozone gas?

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

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

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

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

_________ is used to make liquid soap and shaving cream.

Which product is obtained when chloromethane is reduced?

Which of the following is a Lewis base?

Chemical formula of ammonium carbamate is:

Which of the following is not a source of starch?

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

Which one of the followings is insoluble in water?

Which is reddish brown gas?

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

Highest temperature in Mesosphere is:

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

Which of the following is used for ripening of fruits?

Raffinose produces ______ units of simple sugars when hydrolyzed.

Which of the followings is not a waterborne disease?

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

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

Most of air pollution is caused by:

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

Which compound has two halogen atoms on adjacent carbon atoms?

At what pH does Phenolphthalein change its colour?

Which process produces an alkane?

Formic acid contains functional group:

Which of the following is used as Antacid?

The word vitamin was first used by:

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

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

Which of the following causes brain damage in children?

At equilibrium state of a reversible reaction:

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

Which of the following is used as domestic fuel?

Which of the following is a homocyclic compound?

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

In an irreversible reaction, equilibrium is:

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

Which of the following is the functional group of amine?

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

Which one of the following vitamins is fat soluble?

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

Which of the following is not a waterborne disease?

Which of the following is the chemical formula of Gypsum?

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

Which scientist proposed the law of mass action?

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

Which process produces an alkane?

Formic acid contains functional group:

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

Which substance is used as antacid and laxative?

PbS is the formula of:

By dehydration, we mean the removal of:

Which of the following is a heterocyclic compound?

What happens when ammonium carbamate is distilled with steam?

Which process produces an Alkane?

What is the chemical formula of slaked lime?

Which compound is not a saturated hydrocarbon?

The general formula of alkynes is:

__________ is used for artificial ripening of fruits.

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

Halite is an ore of:

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

The formula of Halite is:

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

Acid rain has pH less than:

___________ is used to make rectified spirit by fermentation process

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

Which of the following is an ore of Aluminum?

For which reaction Kc has NO units?

The volumetric ratio between hydrogen and oxygen in water is:

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

Ice floats over liquid water because:

Which of the following is an Ether?

In an irreversible reaction equilibrium is:

Which is used for dehydro-halogenation?

Which of the following is an aldehyde?

What is the colour of phenolphthalein in acidic medium?

Active mass means ____________.

Plants convert glucose into:

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

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

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

The general formula for Amines is:

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

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

Identify the compound responsible for acid rain: