Class 10 Chemistry Past Papers MCQs Grand Practice Test

Which one is not an air pollutant?

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

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

Which product is obtained when chloromethane is reduced?

Plants convert glucose into:

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

The volumetric ratio between hydrogen and oxygen in water is:

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

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

The word vitamin was first used by:

Chalcopyrite is the ore of:

Formic acid contains functional group:

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

At equilibrium state of a reversible reaction:

Most of air pollution is caused by:

Which of the following is used as jet fuel?

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

What is the colour of methyl red in basic solution?

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

Percentage of nitrogen in urea 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?

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

Formic acid contains _______ functional group.

Which human activity results in contamination of water bodies?

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

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

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

Which of the following is responsible for acid rain?

Identify the compound responsible for acid rain:

By dehydration, we mean the removal of:

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

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

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

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 of the following Salts causes temporary hardness in water?

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

Which of the following is a heterocyclic compound?

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

Which of the following acids is found in Butter?

Which of the following is a Lewis base?

Which of the following is the chemical formula of Haematite?

Which of the following is a Lewis base?

Which of the following is not a source of starch?

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

Which of the following is a Lewis Base?

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

For which reaction Kc has NO units?

In an irreversible reaction, equilibrium is:

Active mass means ____________.

At what pH does Phenolphthalein change its colour?

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

__________ is used to manufacture urea fertilizer.

Which of the following cannot be classified as Arrhenius acid?

Which of the following is used for ripening of fruits?

Which gas has lowest percentage in the air?

Each DNA nucleotide consists of:

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

Permanent hardness of water can be removed by:

Formic acid contains functional group:

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

Ice floats over liquid water because:

Which of the following is the functional group of amine?

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

The substance which fight against diseases in living organisms are:

By dehydration we mean the removal of:

Lowest temperature in stratosphere is:

Phenol gives _______ ppt with bromine water.

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

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

The functional group of Amines is

Which scientist proposed the law of mass action?

Which is reddish brown gas?

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

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

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

Which of the following is not a water borne disease?

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

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:

The general formula of alkynes is:

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

Which of the following substance reacts with to produce ethyleneglycol?

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

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

Which of the following is used as domestic fuel?

Kwashiorkor is a disease caused by an extreme lack of:

Which compound has two halogen atoms on adjacent carbon atoms?

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

Lowest temperature in stratosphere is:

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

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

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

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

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

____________ causes breathing difficulties, asthma and eye irritation.

Highest temperature in Mesosphere is:

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

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

Which of the following causes brain damage in children?

The formula of ammonium carbamate is:

Stem "But" stands for how many carbon atoms?

__________ is used for artificial ripening of fruits.

Which substance is used as antacid and laxative?

The density of water is maximum at:

Which of the following is a homocyclic compound?

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

Which of the following is a Lewis acid?

What happens when ammonium carbamate is distilled with steam?

Which of the followings is not a waterborne disease?

Halite is an ore of:

Which is used for dehydro-halogenation?

In an irreversible reaction equilibrium is:

Chemical formula of Slaked lime is:

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

Which one of the following vitamins is fat soluble?

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

PbS is the formula of:

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

Which of the following is the chemical formula of Gypsum?

Which one of the followings is insoluble in water?

Which process produces an Alkane?

Which of the following is used as Antacid?

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

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

Chemical formula of ammonium carbamate is:

Raffinose produces ______ units of simple sugars when hydrolyzed.

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

Galena is the ore of _________ metal.

Which of the following is not a waterborne disease?

_________ is used to make liquid soap and shaving cream.

Which of the following is a water soluble vitamin?

Which of the following is an ore of Aluminum?

Which of the following is an Ether?

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

Acid rain has pH less than:

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

Which is not a dextrose sugar?

Glucose is:

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

Which of the following reacts explosively with methane?

Formic acid contains functional group:

The general formula of alkane is:

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

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

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

Which is an alcohol?

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

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

The general formula for Amines is:

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

Pitch is produced by:

Which compound is not a saturated hydrocarbon?

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

Which of the following process is reduction in nature?

What is the chemical formula of slaked lime?

Which process produces an alkane?

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

Which of the following layers contains ozone gas?

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

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

Which process produces an alkane?

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

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

Which of the following is a heterocyclic compound?

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

Which of the following is an aldehyde?

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

The linkage which joins two amino acids is called:

The formula of Halite is:

Which is used for dehydrohalogenation of Alkyl halides?

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

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

What is the colour of phenolphthalein in acidic medium?

___________ is used to make rectified spirit by fermentation process

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