Class 10 Chemistry Past Papers MCQs Grand Practice Test

Acid rain has pH less than:

Which gas has lowest percentage in the air?

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

Which is an alcohol?

Plants convert glucose into:

Formic acid contains functional group:

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

Which process produces an alkane?

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

Highest temperature in Mesosphere is:

The formula of ammonium carbamate is:

Chemical formula of Slaked lime is:

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

Which substance is used as antacid and laxative?

In an irreversible reaction, equilibrium is:

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

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 is the chemical formula of Haematite?

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

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

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

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

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

Which of the following is not a source of starch?

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

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

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

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

Which of the following is used as domestic fuel?

PbS is the formula of:

Which one of the following vitamins is fat soluble?

Which of the following is a Lewis Base?

Which of following catalysts is used to form { NH }_{ 3 } gas from Nitrogen & Hydrogen gas?

Lowest temperature in stratosphere is:

Which is not a dextrose sugar?

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

Lowest temperature in stratosphere is:

Identify the compound responsible for acid rain:

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

Which of the following is an ore of Aluminum?

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

Which of the following is the functional group of amine?

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

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

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

Which of the following is used for ripening of fruits?

Permanent hardness of water can be removed by:

Which of the following is a Lewis base?

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

Which of the following is a homocyclic compound?

Chemical formula of ammonium carbamate is:

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

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 used to remove permanent hardness in water?

Which scientist proposed the law of mass action?

Which of the following is an Ether?

Which of the following reacts explosively with methane?

By dehydration we mean the removal of:

Each DNA nucleotide consists of:

Which of the following is not a waterborne disease?

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

Most of air pollution is caused by:

Pitch is produced by:

Which of the following process is reduction in nature?

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?

The volumetric ratio between hydrogen and oxygen in water is:

Which of the followings is not a waterborne disease?

Which of the following substance reacts with to produce ethyleneglycol?

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

Which of the following is a heterocyclic compound?

____________ causes breathing difficulties, asthma and eye irritation.

Active mass means ____________.

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

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

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

Which of the following is a heterocyclic compound?

A double arrow (rightleftharpoons ) indicates.

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

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

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

Ice floats over liquid water because:

Which of the following acids is found in Butter?

The functional group of Amines is

For which reaction Kc has NO units?

Which of the following layers contains ozone gas?

Which compound has two halogen atoms on adjacent carbon atoms?

Formic acid contains functional group:

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

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:

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

Which compound is not a saturated hydrocarbon?

Which one is not an air pollutant?

Which of the following cannot be classified as Arrhenius acid?

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

Which of the following Salts causes temporary hardness in water?

Kwashiorkor is a disease caused by an extreme lack of:

At equilibrium state of a reversible reaction:

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

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

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

Which is used for dehydrohalogenation of Alkyl halides?

___________ is used to make rectified spirit by fermentation process

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

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

Chalcopyrite is the ore of:

What is the unit of equilibrium constant for N_{ 2(g) }+O_{ 2(g) }rightleftharpoons 2N{ O }_{ (g) }?

Formic acid contains functional group:

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

Which is reddish brown gas?

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

Which of the following is a Lewis acid?

Which of the following is the chemical formula of Gypsum?

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

Which process produces an Alkane?

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

Stem "But" stands for how many carbon atoms?

Halite is an ore of:

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

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

Which one of the followings is insoluble in water?

In an irreversible reaction equilibrium is:

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

Which of the following is a Lewis base?

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

The density of water is maximum at:

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

Which product is obtained when chloromethane is reduced?

Which of the following causes brain damage in children?

Which of the following is an aldehyde?

Phenol gives _______ ppt with bromine water.

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

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

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

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

__________ is used for artificial ripening of fruits.

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

The general formula for Amines is:

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

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

Glucose is:

The substance which fight against diseases in living organisms are:

Raffinose produces ______ units of simple sugars when hydrolyzed.

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

What is the colour of methyl red in basic solution?

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

Which of the following is responsible for acid rain?

Which human activity results in contamination of water bodies?

Which of the following is not a water borne disease?

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

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

The general formula of alkynes is:

Which of the following is a water soluble vitamin?

__________ is used to manufacture urea fertilizer.

Which of the following is used as Antacid?

What happens when ammonium carbamate is distilled with steam?

Which is used for dehydro-halogenation?

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

Galena is the ore of _________ metal.

Which of the following is used as jet fuel?

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

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

Formic acid contains _______ functional group.

Which process produces an alkane?

What is the chemical formula of slaked lime?

By dehydration, we mean the removal of:

The formula of Halite is:

The word vitamin was first used by:

Percentage of nitrogen in urea is:

What is the colour of phenolphthalein in acidic medium?

The general formula of alkane is:

_________ is used to make liquid soap and shaving cream.

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