Class 10 Chemistry Past Papers MCQs Grand Practice Test

Percentage of nitrogen in urea is:

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

In an irreversible reaction, equilibrium is:

Which process produces an Alkane?

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

Which process produces an alkane?

Which of the following cannot be classified as Arrhenius acid?

Which of the following is a Lewis base?

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

Plants convert glucose into:

Which of the following is an Ether?

What is the chemical formula of slaked lime?

The formula of ammonium carbamate is:

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

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

Kwashiorkor is a disease caused by an extreme lack of:

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

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

At what pH does Phenolphthalein change its colour?

Which of the following is used as Antacid?

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

____________ causes breathing difficulties, asthma and eye irritation.

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

Which of the following is the chemical formula of Haematite?

The linkage which joins two amino acids is called:

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

Which of the following is responsible for acid rain?

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

Which of the following causes brain damage in children?

The density of water is maximum at:

Which of the following is used as jet fuel?

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

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

Which of the following is a water soluble vitamin?

Which human activity results in contamination of water bodies?

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 a Lewis Base?

Which compound has two halogen atoms on adjacent carbon atoms?

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

_________ is used to make liquid soap and shaving cream.

Which of the following process is reduction in nature?

In an irreversible reaction equilibrium 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 is used for dehydrohalogenation of Alkyl halides?

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

PbS is the formula of:

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

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

What happens when ammonium carbamate is distilled with steam?

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

The general formula for Amines is:

Which of the following Salts causes temporary hardness in water?

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

At equilibrium state of a reversible reaction:

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

Which of the followings is not a waterborne disease?

___________ is used to make rectified spirit by fermentation process

__________ is used for artificial ripening of fruits.

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 reacts explosively with methane?

Active mass means ____________.

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

Which of the following layers contains ozone gas?

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

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

Which of the following acids is found in Butter?

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

Raffinose produces ______ units of simple sugars when hydrolyzed.

Which gas has lowest percentage in the air?

Which of the following substance reacts with to produce ethyleneglycol?

Galena is the ore of _________ metal.

Which product is obtained when chloromethane is reduced?

Which of the following is the chemical formula of Gypsum?

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

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

Which is not a dextrose sugar?

Each DNA nucleotide consists of:

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

What is the colour of phenolphthalein in acidic medium?

Which of the following is not a source of starch?

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

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

Which of the following is used as domestic fuel?

The volumetric ratio between hydrogen and oxygen in water is:

The functional group of Amines is

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

Highest temperature in Mesosphere is:

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

Most of air pollution is caused by:

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

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

Ice floats over liquid water because:

Which is reddish brown gas?

The general formula of alkane is:

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

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

Which scientist proposed the law of mass action?

Permanent hardness of water can be removed by:

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

Which one of the followings is insoluble in water?

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

Phenol gives _______ ppt with bromine water.

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

By dehydration we mean the removal of:

For which reaction Kc has NO units?

Which of the following is a Lewis acid?

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

Which of the following is a Lewis base?

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

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

Lowest temperature in stratosphere is:

Stem "But" stands for how many carbon atoms?

Pitch is produced by:

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

Formic acid contains _______ functional group.

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

Lowest temperature in stratosphere is:

Acid rain has pH less than:

Which of the following is a heterocyclic compound?

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 is used for ripening of fruits?

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

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

Halite is an ore of:

Which of the following is the functional group of amine?

Chemical formula of Slaked lime is:

Chemical formula of ammonium carbamate is:

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

Which of the following is an aldehyde?

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

What is the colour of methyl red in basic solution?

The substance which fight against diseases in living organisms are:

Glucose is:

The word vitamin was first used by:

Which of the following is a heterocyclic compound?

Which of the following is not a waterborne disease?

Which of the following is an ore of Aluminum?

Which is an alcohol?

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

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

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

Which process produces an alkane?

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

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

Identify the compound responsible for acid rain:

Formic acid contains functional group:

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

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

Which is used for dehydro-halogenation?

Which of the following is a homocyclic compound?

Formic acid contains functional group:

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

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

Which compound is not a saturated hydrocarbon?

Which one of the following vitamins is fat soluble?

Which substance is used as antacid and laxative?

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

Which of the following is not a water borne disease?

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

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

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

The formula of Halite is:

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

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

Chalcopyrite is the ore of:

Formic acid contains functional group:

By dehydration, we mean the removal of:

__________ is used to manufacture urea fertilizer.

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:

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

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 is not an air pollutant?

The general formula of alkynes is:

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