8881 + Interview Questions in Chemistry in Class 10 Page 51 InterviewSolution

2501.	The reaction taken place when ethanol is heated with Conc. H_(2)SO_(4) at 413K is…………………
Answer» INTERMOLECULAR DEHYDRATION HYDROGENATION oxidation intramolecular dehydration Answer :A

Discussion

2502.	The reaction S_(8)+12OH^(-)rarr4S^(2-)+2S_(2)O_(3)^(2-)+6H_(2)O is
Answer» COMBINATION reaction Decomposition reaction Non-metal displacement Disproportionation reaction Answer :D

Discussion

2503.	The reaction respresented by the eqaution CuSO_(4) + Fe to FeSO_(4) +Cu is a
Answer» SYNTHESIS REACTION DECOMPOSITION reaction neutralization reaction DISPLACEMENT reaction Answer :D

Discussion

2504.	The reaction Pb(OH)_(2)+HNO_(3)toPb(OH)NIO_(3)+H_(2)O shows that Pb(OH)NO_(3) is
Answer» an ACID salt a BASIC salt a base an acid Solution :NA

Discussion

2505.	The reactionofsodiumwithhydrochloricacidis fasterthan thatwith ________.
Answer» SOLUTION :ACETIC ACID

Discussion

2506.	The reaction of one mol of bromine with ethyne yields
Answer» `BrCH_2 - CH_2 BR` `BrCH = CHBr` `Br_2 CH - CH Br_2` `CH_3 - CH_2 Br` Solution :`H - C-= C - H + 1 Br_2 ` `to H - UNDERSET(Br) underset(\|)(C ) underset(Br)underset(\|)C - H`

Discussion

2507.	The reaction of metal with acid results in the formation of
Answer» only Hydrogen GAS only SALT both salt and hydrogen gas NONE of these Solution :METALS on reaction with acid four metal salt and LIBERATES `H_2` gas. Mg + 2HCl to Mg Cl_2 + H_2 `

Discussion

2508.	The reaction of heat on copper carbonate into copper(II) oxide is …….reaction.
Answer» Combination Decomposition Displacement redox Answer :C::D

Discussion

2509.	The reaction of H_(2) gas with oxygen gas forms water. This reaction is an example of:
Answer» COMBINATION reaction redox reaction an EXOTHERMIC reaction all of these REACTIONS Solution :all of these reactions

Discussion

2510.	The reaction of ethanol with ethanoic acid in the presence of Conc. H_(2)SO_(4) is known as…………………
Answer» etherification ESTERIFICATION DEHYDROGENATION dehydration Answer :B

Discussion

2511.	The reaction of cyanamide, NH_(2)CN(s), with Dioxygen was carried out in a bomb calorimeter, and DeltaU was found to be -742.7 kJ mol^(-1) at 298K. Calculate Enthalpy change for the reaction at 298K, NH_(2) CN (s) + 3//2O_(2)(g) rarr N_(2)(g) + CO_(2) (g) + H_(2)O(I)
Answer» SOLUTION :`-741.5 KJ MOL^(-1)`

Discussion

2512.	The reaction of calcium oxide with water is a……reaction.
Answer» EXOTHERMIC Endothermic Isothermic Adiabatic Answer :C

Discussion

2513.	The reaction of Barium chloride with Aluminium sulphate solution is an example for which type of chemical reaction ? Why ? Write the balanced chemical equation for this reaction.
Answer» Solution :Barium chloride with aluminium SULPHATE solution `3 BaCl_(2)+ Al_(2) (SO_(4))_(3) rarr 3 BaSO_(4)darr + 2 AICI_(3)` • It is a double displacement reaction The reactions in which the different atoms or group of atoms are displaced by other atoms or group of atoms, i.e. two COMPOUNDS exchange their ions and one of the products formed is INSOLUBLE, are said to be double displacement reactions. As in this case, Cl and `SO_(4)`ions are exchanged, it is known as double displacement reaction. It is a precipitation reaction. There if formation of PRECIPITATE `(BaSO_(4))`thus it is also known as precipitation reaction .

Discussion

2514.	Translate the following statements into chemical equations and balance them. Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
Answer» Solution :It is an example for double displacement reaction or PRECIPITATION reaction. There is an exchange of ions between the REACTANTS. /White precipitate of Barium Sulphate is FORMED. `3BaCl_(2)+Al_(2)(SO_(4))_(2)to3BaSO_(4)+2AlCl_(3)`.

Discussion

2515.	The reaction of ammonium hydroxide and carbonic acid results in the formation of
Answer» AMMONIUM CHLORIDE and WATER ammonium CARBONATE and water only ammonium carbonate only water Answer :B

Discussion

2516.	The reaction of acetic acid and sodium hydroxide results in the formation of
Answer» acidic SALT basic salt neutral salt none of these Solution :Acetic ACID is a weak acid and SODIUM hydroxide is a strong BASE. HENCE, the salt formed will be a basic salt.

Discussion

2517.	The reaction occurring as CuSO_(4) +Fe to FeSO_(4)+Cu
Answer» SOLUTION :SUBSTITUTION

Discussion

2518.	The reaction in which to compounds exchange their ions to form two compounds is called
Answer» a DISPLACEMENT reaction a DECOMPOSITION reaction an ISOMERIZATION reaction a metathesi reaction Answer :D

Discussion

2519.	The reaction in which oxygen is gained is called ____
Answer» ANSWER :OXIDATION

Discussion

2520.	The reaction in which hydrogen is gained is called ______
Answer» ANSWER :REDUCTION

Discussion

2521.	The reaction FeS + H_(2) SO_(4) to FeSO_(4) + H_(2)S is an example of double displacement reaction.
Answer» ANSWER :T

Discussion

2522.	The reaction CaCO_(3) to CaO + CO_(2) is a _______ reaction .
Answer» ANSWER :DECOMPOSITION

Discussion

2523.	The reaction between Zn and dilute H_(2)SO_(4) may be represented by the equation Zn +2H^(+) to Zn^(2+) +H_(2) in this reaction
Answer» `H^(+)` ion is oxidized `H^(+)` ion is reduced `H^(+)` ion is NEUTRALIZED `H^(+)` ion REMAINS unchanged Answer :B

Discussion

2524.	The reaction between zinc and dilute sulphuric acid is a
Answer» Combination reaction . neutralization reaction redox reaction DECOMPOSITION reaction ANSWER :C

Discussion

2525.	The reaction between magnesium and oxygen is an example of combustion.
Answer» ANSWER :T

Discussion

2526.	The reaction between lead nitrate and potassium iodide solutions is an example for what types of chemical reaction? Explain. Write the balanced chemical equation for this reaction.
Answer» Solution :On MIXING, TWO colourless solutions of lead nitrate and POTASSIUM iodide yellow precipitate is FORMED. `Pb(NO_3)_2(aq) + 2KItoPbI_2(s) + 2KNO_3(aq)` This is an example for a chemical reaction (double displacement) in which FORMATION of precipitate is observed.

Discussion

2527.	The reaction between ethanol and ethanoic acid in the presence of concentrated sulphuric acid is called ______(esterification/neutralisation)
Answer» SOLUTION :ESTERIFICATION

Discussion

2528.	The reaction between ethanol and ethanoic acid in the presence of conc. sulphuric acid is called
Answer» NEUTRALISATION SAPONIFICATION DEHYDRATION ESTERIFICATION ANSWER :D

Discussion

2529.	The reaction BaCl_(2) +Na_(2)SO_(4) to BaSO_(4) + 2NaCl is an example of a
Answer» DISPLACEMENT reaction double displacement reaction dissociation reaction disproportionation reaction Answer :B

Discussion

2530.	The reaction 2Na + C1_(2) to 2Na C1 is an example of
Answer» COMBINATION reaction DECOMPOSITION reaction displacement reaction double decomposition reaction Answer :A

Discussion

2531.	The reaction2C + O_(2) rarr 2CO is carried out by taking 24.0 g of carbon and 96.0 g ofO_(2). Find out. Which reactant is left in excess ?
Answer» ANSWER :`O_(2)`

Discussion

2532.	The reaction2C + O_(2) rarr 2CO is carried out by taking 24.0 g of carbon and 96.0 g ofO_(2). Find out. How many grams of the other reactant should be taken so that nothing is left at the end of the reaction ?
Answer» ANSWER :72

Discussion

2533.	The reaction2C + O_(2) rarr 2CO is carried out by taking 24.0 g of carbon and 96.0 g ofO_(2). Find out. How much of it is left ?
Answer» ANSWER :64 G

Discussion

2534.	The ratio of volumes of H_(2) and O_(2) liberated on electrolysis of water is ____
Answer» `1 : 2` `1 : 3` `2 : 1` `3 : 1` SOLUTION :`H_(2)O rarr H^(+) + OH^(-)` Cathode : `4OH^(-) rarr 2H_(2)O + O_(2) + 4E^(-)` ANODE : `4H^(+) + 4e^(-) rarr 2H_(2)` `:.` The ratio of volume of `H_(2) and O_(2) "is " 2 : 1`

Discussion

2535.	The ratio of the volumes of 11 g of CO_(2) and28 g of CO at STP is __________ .
Answer» ANSWER :`1 ;4`

Discussion

2536.	The ratio of the gram atomic weight of nitrogen and oxygen is __________ .
Answer» ANSWER :`7 : 8`

Discussion

2537.	The ratio of the energies of two different radiation whose frequenceies are 3xx10^(14)Hz and 5xx10^(14)Hz is "____________"
Answer» ANSWER :`3:5`

Discussion

2538.	The ratio of energy to frequency of electromagnetic radiation is equal to "____________"
Answer» ANSWER :PLANCK's CONSTANT

Discussion

2539.	The ratio of atomic numbers of two elements X and Y is 1 : 7. Radius of 5th orbit ofsingle electron species of X is 3.3 Å. Write the electronic con figuration of Y and four quantum numbers for the valence electrons
Answer» Solution :The ATOMIC number of B is 73 because its ELECTRONIC configuration is `[Xe]6s^24gamma^(14)5d^3` `therefore` Atomic number of A is x , that is73-54=68 So , its electronic configuration is `[Xe]6s^2 5d^1 4F^(11)`

Discussion

2540.	The ratio bymass of sulphur and oxygen in SO_(2) is
Answer» `1 : 2` ` 2 : 1` ` 1 : 1` ` 1 : 4` ANSWER :C

Discussion

2541.	The rate of the reaction between ionic compounds cannot be determined because they are generally
Answer» immeasurably SLOW reactions moderately slow reactions instantaneous reactions not precipitation REACTION Solution :The rate for the reaction between IONIC compounds cannot be determined because they are generally instantaneous reactions.

Discussion

2542.	The rateof the backwardreaction______ withtime .
Answer» SOLUTION :INCREASES

Discussion

2543.	The rate of diffusion of methane is double the rate of diffusion of sulphur dioxide gas.
Answer» ANSWER :1

Discussion

2544.	The rate of diffusion is fastest in
Answer» Solid Liquid Gases All of the above Answer :C

Discussion

2545.	"The rate of breathing in aquatic organisms is much faster than that seen in terrestrial organisms." Why?
Answer» Solution :• A terrestrial ORGANISM can obtain oxygen DIRECTLY from the air and have slow breathing rate but ilquatic organisms have to obtain oxygen for respiration which is dissolved in water. • Since, the amount of oxygen dissolved in water is fairly low as COMPARED to the amount of oxygen in air the rate of breathing in aquatic organism is much FASTER.

Discussion

2546.	The rateofa reaction isdirectlyproportional tothe ______.
Answer» SOLUTION :CONCENTRATION

Discussion

2547.	The rate of a reaction depends on the
Answer» TEMPERATURE of the REACTION catalyst concentration of the reactants all of these Solution :The RATE of the reaction DEPENDS on the concentrationof the REACTIONS , temperature and catalyst.

Discussion

2548.	The property of an atom to form a bond with itself is known as
Answer» ISOMERISM CATENATION allotropy none of these Solution :catenation

Discussion

2549.	The property by which a crystal loses its water of crytallization is called
Answer» DELIQUESCENCE efflorescence hydroscopy diffusion ANSWER :B

Discussion

2550.	The properties of the elements, as well as the formulae and properties of their compounds depends in a periodic manner on the atomic weights of the elements. This periodic law was given by
Answer» JOHN A.R. NEW LANDS Dobernier D.I Mendeleev Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

The reaction taken place when ethanol is heated with Conc. H_(2)SO_(4) at 413K is…………………

The reaction S_(8)+12OH^(-)rarr4S^(2-)+2S_(2)O_(3)^(2-)+6H_(2)O is

The reaction respresented by the eqaution CuSO_(4) + Fe to FeSO_(4) +Cu is a

The reaction Pb(OH)_(2)+HNO_(3)toPb(OH)NIO_(3)+H_(2)O shows that Pb(OH)NO_(3) is

The reactionofsodiumwithhydrochloricacidis fasterthan thatwith ________.

The reaction of one mol of bromine with ethyne yields

The reaction of metal with acid results in the formation of

The reaction of heat on copper carbonate into copper(II) oxide is …….reaction.

The reaction of H_(2) gas with oxygen gas forms water. This reaction is an example of:

The reaction of ethanol with ethanoic acid in the presence of Conc. H_(2)SO_(4) is known as…………………

The reaction of cyanamide, NH_(2)CN(s), with Dioxygen was carried out in a bomb calorimeter, and DeltaU was found to be -742.7 kJ mol^(-1) at 298K. Calculate Enthalpy change for the reaction at 298K, NH_(2) CN (s) + 3//2O_(2)(g) rarr N_(2)(g) + CO_(2) (g) + H_(2)O(I)

The reaction of calcium oxide with water is a……reaction.

The reaction of Barium chloride with Aluminium sulphate solution is an example for which type of chemical reaction ? Why ? Write the balanced chemical equation for this reaction.

Translate the following statements into chemical equations and balance them. Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.

The reaction of ammonium hydroxide and carbonic acid results in the formation of

The reaction of acetic acid and sodium hydroxide results in the formation of

The reaction occurring as CuSO_(4) +Fe to FeSO_(4)+Cu

The reaction in which to compounds exchange their ions to form two compounds is called

The reaction in which oxygen is gained is called ____

The reaction in which hydrogen is gained is called ______

The reaction FeS + H_(2) SO_(4) to FeSO_(4) + H_(2)S is an example of double displacement reaction.

The reaction CaCO_(3) to CaO + CO_(2) is a _______ reaction .

The reaction between Zn and dilute H_(2)SO_(4) may be represented by the equation Zn +2H^(+) to Zn^(2+) +H_(2) in this reaction

The reaction between zinc and dilute sulphuric acid is a

The reaction between magnesium and oxygen is an example of combustion.

The reaction between lead nitrate and potassium iodide solutions is an example for what types of chemical reaction? Explain. Write the balanced chemical equation for this reaction.

The reaction between ethanol and ethanoic acid in the presence of concentrated sulphuric acid is called ______(esterification/neutralisation)

The reaction between ethanol and ethanoic acid in the presence of conc. sulphuric acid is called

The reaction BaCl_(2) +Na_(2)SO_(4) to BaSO_(4) + 2NaCl is an example of a

The reaction 2Na + C1_(2) to 2Na C1 is an example of

The reaction2C + O_(2) rarr 2CO is carried out by taking 24.0 g of carbon and 96.0 g ofO_(2). Find out. Which reactant is left in excess ?

The reaction2C + O_(2) rarr 2CO is carried out by taking 24.0 g of carbon and 96.0 g ofO_(2). Find out. How many grams of the other reactant should be taken so that nothing is left at the end of the reaction ?

The reaction2C + O_(2) rarr 2CO is carried out by taking 24.0 g of carbon and 96.0 g ofO_(2). Find out. How much of it is left ?

The ratio of volumes of H_(2) and O_(2) liberated on electrolysis of water is ____

The ratio of the volumes of 11 g of CO_(2) and28 g of CO at STP is __________ .

The ratio of the gram atomic weight of nitrogen and oxygen is __________ .

The ratio of the energies of two different radiation whose frequenceies are 3xx10^(14)Hz and 5xx10^(14)Hz is "____________"

The ratio of energy to frequency of electromagnetic radiation is equal to "____________"

The ratio of atomic numbers of two elements X and Y is 1 : 7. Radius of 5th orbit ofsingle electron species of X is 3.3 Å. Write the electronic con figuration of Y and four quantum numbers for the valence electrons

The ratio bymass of sulphur and oxygen in SO_(2) is

The rate of the reaction between ionic compounds cannot be determined because they are generally

The rateof the backwardreaction______ withtime .

The rate of diffusion of methane is double the rate of diffusion of sulphur dioxide gas.

The rate of diffusion is fastest in

"The rate of breathing in aquatic organisms is much faster than that seen in terrestrial organisms." Why?

The rateofa reaction isdirectlyproportional tothe ______.

The rate of a reaction depends on the

The property of an atom to form a bond with itself is known as

The property by which a crystal loses its water of crytallization is called

The properties of the elements, as well as the formulae and properties of their compounds depends in a periodic manner on the atomic weights of the elements. This periodic law was given by