Class 10 Chemistry Past Papers MCQs Grand Practice Test

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

Which of the following is not a water borne disease?

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

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

Which of the following is a Lewis base?

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

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

Stem "But" stands for how many carbon atoms?

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

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

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

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

Formic acid contains functional group:

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

Which one is not an air pollutant?

Which of the following acids is found in Butter?

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

The word vitamin was first used by:

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

Which of the following is used as jet fuel?

Which of the following process is reduction in nature?

Kwashiorkor is a disease caused by an extreme lack of:

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

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

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

The substance which fight against diseases in living organisms are:

Which of the following is the chemical formula of Haematite?

Which of the following is responsible for acid rain?

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 formula of ammonium carbamate is:

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

Which of the following is a Lewis Base?

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

Permanent hardness of water can be removed by:

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

Which gas has lowest percentage in the air?

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

At equilibrium state of a reversible reaction:

The formula of Halite is:

Which is used for dehydrohalogenation of Alkyl halides?

Which of the following reacts explosively with methane?

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

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

Acid rain has pH less than:

PbS is the formula of:

Which of the following is used as domestic fuel?

Galena is the ore of _________ metal.

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

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

The linkage which joins two amino acids is called:

By dehydration we mean the removal of:

The volumetric ratio between hydrogen and oxygen in water is:

What is the colour of methyl red in basic solution?

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

Which substance is used as antacid and laxative?

Which scientist proposed the law of mass action?

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

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

Which is used for dehydro-halogenation?

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

Formic acid contains functional group:

Which is not a dextrose sugar?

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

Ice floats over liquid water because:

Which compound is not a saturated hydrocarbon?

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

For which reaction Kc has NO units?

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

The density of water is maximum at:

A double arrow (\rightleftharpoons ) indicates.

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

Raffinose produces ______ units of simple sugars when hydrolyzed.

Which of the following is used as Antacid?

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

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

Phenol gives _______ ppt with bromine water.

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

Lowest temperature in stratosphere is:

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

__________ is used to manufacture urea fertilizer.

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 evolved during the ripening of fruits and vegetables?

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

In an irreversible reaction, equilibrium is:

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

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

What is the colour of phenolphthalein in acidic medium?

____________ causes breathing difficulties, asthma and eye irritation.

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:

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

Formic acid contains _______ functional group.

Which of the followings is not a waterborne disease?

Chemical formula of Slaked lime is:

By dehydration, we mean the removal of:

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

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

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

Lowest temperature in stratosphere is:

Which of the following is an Ether?

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

Which one of the followings is insoluble in water?

Which process produces an alkane?

Highest temperature in Mesosphere is:

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

__________ is used for artificial ripening of fruits.

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

Which of the following cannot be classified as Arrhenius acid?

Percentage of nitrogen in urea is:

What happens when ammonium carbamate is distilled with steam?

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

Active mass means ____________.

Which of the following is a water soluble vitamin?

In an irreversible reaction equilibrium is:

Formic acid contains functional group:

Halite is an ore of:

Glucose is:

Which of the following is not a waterborne disease?

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 to remove permanent hardness in water?

Which compound has two halogen atoms on adjacent carbon atoms?

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

Which of the following is a Lewis base?

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

Chalcopyrite is the ore of:

Which of the following is the functional group of amine?

Which human activity results in contamination of water bodies?

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

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

Which process produces an Alkane?

Pitch is produced by:

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

Plants convert glucose into:

___________ is used to make rectified spirit by fermentation process

_________ is used to make liquid soap and shaving cream.

Which of the following Salts causes temporary hardness in water?

Most of air pollution is caused by:

Which of the following is used for ripening of fruits?

Which of the following is a homocyclic compound?

Which of the following is not a source of starch?

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?

The functional group of Amines is

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

The general formula of alkynes is:

Which is reddish brown gas?

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 layers contains ozone gas?

Which is an alcohol?

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

Which of the following is an aldehyde?

The general formula of alkane is:

Which of the following is a Lewis acid?

Chemical formula of ammonium carbamate is:

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

Which of the following is a heterocyclic compound?

Which of the following is the chemical formula of Gypsum?

Identify the compound responsible for acid rain:

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

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

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

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

Which one of the following vitamins is fat soluble?

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

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?

The general formula for Amines is:

Each DNA nucleotide consists of:

Which of the following causes brain damage in children?

Which process produces an alkane?

What is the chemical formula of slaked lime?

At what pH does Phenolphthalein change its colour?

Which product is obtained when chloromethane is reduced?

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

Which of the following is an ore of Aluminum?