Matric Notes Chemistry 10th

The characteristics of reversible reactions are the following except:

In the lime kiln, the reaction: CaCO_3(s) --> CaO_(s) + CO_2(g) goes to completion because:

1. of high temperature
2. CaO is more stable than CaCO₃
3. CO₂ escapes continuously
4. CaO is not dissociated

For the reaction, 2A_(g) + B_(g) ⇌ 3C_(g) the expression for the equilibrium constant is:

1. $\frac{[2A][B]}{[3C]}$
2. $\frac{[A]^2[B]}{[C]^3}$
3. $\frac{[3C]}{[2A][B]}$
4. $\frac{[C]^3}{[A]^2[B]}$

What a system is at equilibrium state:

Which one of the following statements is not correct about active mass?

When the magnitude of K_c is very large it indicates:

When the magnitude of K_c is very small it indicates:

Reaction which have comparable amounts of reactants and products at equilibrium state have:

1. very small K_c value
2. very large K_c value
3. moderate K_c value
4. none of the above

At dynamic equilibrium:

In an irreversible reaction dynamic equilibrium:

A reverse reaction is one that:

Nitrogen and hydrogen were reacted together to make ammonia N₂ + 3H₂ ⇌  2NH₃ K_c = 2.86 mol^-2dm⁶. What will be present in the equilibrium mixture?

1. NH₃ only
2. N₂, H₂ and NH₃
3. N₂ and H₂ only
4. H₂ only

For a reaction between PCl₃ and Cl₂ to form PCl₅, the units of K_c are:

1. mol dm^-3
2. mol^-1 dm^-3
3. mol^-1 dm³
4. mol dm³

A base is a substance which neutralizes an acid. Which of these substances is not a base?

Lewis acid-base concept has the following characteristics except:

Acetic acid is used for:

A salt is not composed of:

If a liquid has a pH of 7 then it must:

A salt always:

Dilute acids react with carbonates to produce the given product except:

In the preparation of insoluble salts, which one of the facts is incorrect?

A reaction between an acid and a base produces:

The conjugate acid of HPO₄^2- is:

1. PO₄^3-
2. H₂PO₄^2-
3. H₂PO₄^-
4. H₃PO₄

What is the pOH of 0.02M Ca(OH)₂?

Which one of the following species is not amphoteric?

1. H₂O
2. NH₃
3. HCO₃^-
4. SO₄^2-

The product of Lewis acid-base reaction is called adduct. The bond between the adduct specie is:

The water of crystallization responsible for the:

You want to dry a gas which one of the following salt you will use?

1. CaCl₂
2. NaCl
3. CaO
4. Na₂SiO₃

Ferric hydroxide (Fe(OH)₃) is precipitated out of sodium when aqueous sodium hydroxide solution is added to ferric chloride (FeCl₃):

FeCl_3(aq) + 3NaOH_(aq) --> Fe(OH)_3(s) + 3NaCl_(aq)

Color of the precipitate is:

Which ion is the conjugate base of sulphuric acid?

1. SO₃^2-
2. S^2-
3. HSO₃^-
4. HSO₄^-

Which one of the following is a Lewis base?

1. NH₃
2. BF₃
3. H⁺
4. AlCl₃

According to the Lewis concept, acid is a substance which can:

Given K_w = [H⁺][OH^-] = 1.0 x 10^-14 at 25^oC. What is the concentration of H⁺ in pure water at 25^oC?

1. 1 x 10^-7 mol dm^-3
2. 1 x 10⁷ mol dm^-3
3. 1 x 10^-14 mol dm^-3
4. 1 x 10¹⁴ mol dm^-3

The ability of carbon atoms to form chains is called:

Coal having 90% carbon contents is called:

Main component of natural gas is:

The strong heating of coal in retorts in the absence of air is called:

Pitch is black residue of:

Natural gas is 85% methane. It is used to make:

Which one of the following does not contain starch?

Petroleum is refined by:

In laboratory urea was prepared by:

General formula of alkyl radical is:

1. C_nH_2n+2
2. C_nH_2n-2
3. C_nH_2n+1
4. C_nH_2n

Identify which one of the following compounds is a ketone:

1. (CH₃)₂CHOH
2. (CH₃)₂CHCl
3. (CH₃)₂CO
4. (CH₃)₂NH

The functional group -COOH is found in:

Which one of the following statements is not true about fossil fuels?

Which one of the following is the hardest coal?

In which of the following groups, oxygen is attached on both sides with carbon atoms?

Carbonization process is the conversion of:

Coal gas is a mixture of:

1. CO and CH₄
2. CO, CH₄, CO₂
3. CO, CH₄, H₂
4. CO, H₂, CO₂

Which one of the following is a synthetic fiber?

Which one of the following is not a fossil fuel?

Which one of the following does not contain protein:

Which of these hydrocarbon molecules would have no effect on an aqueous solution of bromine?

1. CH₄
2. C₁₀H₂₀
3. C₂H₄
4. C₂H₂

If an organic compound has 4 carbon atoms, all singly bonded, it will have the following characteristics except one:

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

Halogenation of methane produces following valuable chemical compounds used as solvents except:

Incomplete combustion of alkanes produces:

Alkenes are prepared from alcohols by a process called:

Dehydrohalogenation takes place in the presence of:

Oxidation of ethene with KMnO₄ produces:

Which one of these is a saturated hydrocarbon?

1. C₂H₄
2. C₃H₆
3. C₄H₈
4. C₅H₁₂

A hydrocarbon has molecular formula C₈H₁₄. What is the molecular formula of the next member of the same homologous series?

1. C₉H₁₈
2. C₉H₁₆
3. C₉H₂₀
4. C₉H₁₂

What is the molecular formula for the eighth alkane member, octane, which is found in petrol?

1. C₈H₈
2. C₈H₁₆
3. C₈H₁₈
4. C₈H₂₀

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X?

1. C₃H₈
2. C₆H₁₂
3. C₄H₁₀
4. C₇H₁₆

Dehydration of alcohols can be carried out with:

1. NaOH
2. KOH
3. H₂SO₄
4. HCl

The end product of oxidation of acetylene is:

Dehalogenation of tetrahalides produces acetylene. This reaction takes place in the presence of:

Substitution reaction is the characteristics of:

Halogenation of alkanes in the presence of diffused sunlight takes place:

Which one of the following is a substitution reaction?

The order of reactivity of hydrogen halides with alkenes is:

Oxidation of alkenes produces:

Carbohydrates are synthesized by plants through photosynthesis process which requires the following except:

1. CO₂ and water
2. sunlight
3. O₂
4. chlorophyll

Which of the following is a disaccharide?

Photosynthesis process produces:

Which of the following is tasteless?

When glucose and fructose combine they produce:

Glucose is:

Thousands of amino acids polymerize to form:

Which of the following is a triglyceride?

Enzymes are proteins which have the following properties except:

Which one of the following vitamins is water soluble?

Which one of the following is a fat soluble vitamin?

Which one of the following is not the characteristics of monosaccharides?

Which one of the following statements about glucose and sucrose is incorrect?

Which one of the following is a reducing sugar?

The most important oligosaccharide is:

Night blindness is because of deficiency of:

The organic compounds used as drugs to control bleeding are:

Deficiency of Vitamin E causes:

Lipids are macromolecules. They have characteristics except one of the following:

Vitamins are Accessory Growth Factors. They play important role in our body like:

About 99% atmosphere's mass lies within:

Depending upon temperature variation, atmosphere is divided into how many regions?

Just above the Earth's surface is:

A group of gases that maintains temperature of atmosphere is:

The Earth's atmosphere is getting hotter because of:

1. increasing concentration of CO
2. increasing concentration of CO₂
3. increasing concentration of O₃
4. increasing concentration of SO₂

Which one of the following is not a greenhouse effect?

Normally rain water is weakly acidic because of:

1. SO₃ gas
2. CO₂ gas
3. SO₂ gas
4. NO₂ gas

Buildings are being damaged by acid rain because it attacks:

Acid rain affects the aquatic life by clogging fish gills because of:

Ozone is beneficial for us as it:

Which one of the following is not an air pollutant?

Iron and steel structures are damaged by:

Infrared radiations emitted by the Earth are absorbed by:

1. CO₂ and H₂O
2. N₂ and O₂
3. CO₂ and N₂
4. O₂ and CO₂

Global warming causes rising of the sea level. The cause of global warming is:

1. CO₂ gas
2. SO₂ gas
3. NO_x gas
4. O₃ gas

Which gas protects the Earth's surface from ultraviolet radiations?

1. CO₂
2. CO
3. N₂
4. O₃

Effects of ozone depletion are following except the one:

Which one of these pollutants are not found in car exhaust fumes?

1. CO
2. O₃
3. NO₂
4. SO₂

The process by which atmospheric nitrogen is turned into nitrates in the soil is called:

Global warming is because of:

Carbon monoxide is harmful to us because:

Which one of the following properties of water is responsible for rising of water in plants?

Specific heat capacity of water is:

1. 4.2 kJg^-1K^-1
2. 4.2 Jg-1K-1
3. 2.4 kJg^-1K^-1
4. 2.4 Jg^-1K^-1

Water dissolves non-iconic compound by:

Temporary hardness of water is because because of:

1. Ca(HCO₃)₂
2. CaCO₃
3. MgCO₃
4. MgSO₄

Temporary hardness of water is removed by adding:

Permanent hardness of water is removed by adding:

1. Na₂zeolite
2. soda lime
3. lime water
4. quick lime

Which one of the following salts makes the water permanently hard?

1. Na₂CO₃
2. NaHCO₃
3. Ca(HCO₃)₂
4. CaSO₄

Rapid growth of algae in water bodies is because of detergent having:

Depletion of O₂ from water is not because of:

Which one of the following diseases causes liver inflammation?

Which one of the following diseases causes severe diarrhea and can be fatal?

Which one of the following gases is used to destroy harmful bacteria in water?

Which one of the following ions does not cause hardness in water?

1. Ca²⁺
2. Mg²⁺
3. SO₄^2-
4. Na⁺

A disease that causes bone and tooth damage is:

Ionic compounds are soluble in water due to:

The chemicals used to kill or control pests are called pesticides. They are

Concentration is a:

Froth flotation is used to concentrate the ore on:

Matte is a mixture of:

1. FeS and CuS
2. Cu₂O and FeO
3. Cu₂S and FeS
4. CuS and FeO

In the bessemerization process:

Concentration of the copper ore is carried out by:

When CO₂ is passed through the ammonical brine the only salt that precipitates is:

1. NaHCO₃
2. NH₄HCO₃
3. Na₂CO₃
4. (NH₄)₂CO₃

In Solvay's process slaked lime is used to:

1. prepare CO₂
2. prepare quick lime
3. recover ammonia
4. form Na₂CO₃

When NaHCO₃ is is heated it forms:

1. CO₂
2. Ca(OH)₂
3. CaCO₃
4. CaO

Formula of urea is:

1. NH₂COONH₄
2. NH₂COONH₂
3. NH₂CONH₄
4. NH₂CONH₂

Crude oil is heated in the fractionating furnace upto __^oC:

When heated crude oil is fed to the fractionating tower:

Which one of the following is used as jet fuel:

Which one of the following is a fraction of crude oil?

Which one of the following is not a fraction of petroleum?

The nitrogen present in urea is used by plants to synthesize:

Which one of the following organic compounds is found in gasoline?

1. C₂H₄
2. C₃H₈
3. C₈H₁₈
4. C₁₂H₂₆

The reaction in which the products do not recombine to form reactants are called:

The reactions in which the products can recombine to form reactants are called:

The color of iodine is:

The color of hydrogen iodide is:

When the rate of the forward reaction takes place at the rate of reverse reaction the composition of the reaction mixture remains constant, it is called:

What a reaction ceases to proceed, it is called:

Guldberg and Waage put forward law of mass action in:

The %age of nitrogen and oxygen in our atmosphere is:

Which gas is used to prepare ammonia?

1. N₂
2. O₂
3. Cl₂
4. S

Which gas is used to manufacture king of chemicals (sulphuric acid)?

1. N₂
2. O₂
3. Cl₂
4. CO₂

Equilibrium constant has no unit when number of moles of reactants and products are:

For reaction having large K_c value, the reaction proceeds to:

Which type of reaction do not go to completion?

Which type of reactions speed up gradually?

Such reactions which continue in both directions are called:

'K_c' represents?

Dynamic means, reaction is:

The forward reaction takes place from:

The units of molar concentration:

1. mol.dm^-2
2. mol.dm^-1
3. mol.dm
4. mol.dm^-3

K_c" is always equal to:

For the following reaction, equilibrium mixture will contain: N₂O_4(g) ⇌ 2NO_2(g) K_c = 0.211:

1. Only N₂O₄
2. Only NO₂
3. NO₂ and N₂O₄ in reasonable amount
4. NO₂ in large amount

If Q_c<K_c, the reaction goes in:

Who proposed the law of mass action?

The value of K_c depends on:

Law of Mass Action describe the relationship between active masses of the reactants and:

Molar concentration of a substance having units of mol dm^-3 and expressed in square brackets is termed as:

While writing the K_c expression of the reaction, the products and reactants are written respectively as:

Equilibrium constant expression for the following reaction is represented as:

1. $\frac{[H_2][I_2]}{[2HI]}$
2. $\frac{[2HI]}{[H_2][I_2]}$
3. $\frac{[H]^2[I]^2}{[2HI]}$
4. $\frac{[HI]^2}{[H_2][I_2]}$

When we put concentrations of substances into the equilibrium constant expression, we obtain a value called:

Equilibrium state is achievable in:

A complete reaction in which:

Who proved the presence of hydrogen as the main constituent of all acids?

The word acid is derived from the:

Acidus means:

Which acid is present in our stomach?

All acids turn blue litmus:

All bases turn red litmus:

According to Arrhenius concept acid is a substance which dissociates in aqueous solution to give:

According to Arrhenius concept base is a substance which dissociates in aqueous solution to give:

Which one is not an Arrhenius acid?

1. HCl
2. H₂SO₄
3. CO₂
4. HNO₃

Which one is not an Arrhenius base?

1. NaOH
2. KOH
3. Ca(OH)₂
4. NH₃

According to Bronsted Lowry concept, an acid is a substance that can donate:

A conjugate acid is a specie formed by accepting a __ by a base:

According to Bronsted Lowry concept, a base is a substance that can accept:

A conjugate base is a specie formed by donating a __ by an acid:

A substance which can behave as an acid as well as a base is called:

According to Lewis concept a base is a substance which can donate:

The product of any Lewis acid base reaction is a single specie called:

Which one is a Lewis acid?

1. BF₃
2. AlCl₃
3. FeCl₃
4. All of these

When acid reacts with metals, which gas is evolved?

1. H₂
2. O₂
3. Cl₂
4. N₂

When acids react with carbonates and bicarbonates, which gas is evolved?

1. H₂
2. CO₂
3. Cl₂
4. N₂

When acid reacts with sulphites and bisulphites, which gas is evolved?

1. H₂
2. CO₂
3. SO₂
4. NH₃

Which one is a mineral acid?

1. HCl
2. H₂SO₄
3. HNO₃
4. All of these

Which acid is used an an electrolyte in lead storage battery?

1. H₂SO₄
2. HNO₃
3. HCl
4. CH₃COOH

Which acid is used for etching designs on copper plates?

1. H₂SO₄
2. HNO₃
3. HCl
4. CH₃COOH

Which acid is used for food preservation?

1. H₂SO₄
2. HNO₃
3. HCl
4. CH₃COOH

Citric acid is present in:

Formic acid is present in: