8881 + Interview Questions in Chemistry in Class 10 Page 126 InterviewSolution

6251.	Element 'X' has twelve protons in its nucleus. To which group of the periodic table it will belong?
Answer» 1 2 6 8 Answer :B

Discussion

6252.	Element X forms a chloride with the formula XCl_2, which is a solid with a high melting point. Xwould most likely be in the same group of the Periodic Table as
Answer» NA Solution :The element X forms a chloride `XCl_2` , therefore, its VALENCY is 2. Out of the given elements Na, Mg,Al and Si, the element of valency 2 is Mg. So, X would most likely be in the same group of the Periodic Table as Mg.

Discussion

6253.	Element X forms a chloride with the formula XCl_(2), which is a solid with a high melting point. X would most likely be in the same group of the periodic table as ….
Answer» Na Mg Al

Discussion

6254.	Element X forms a chloride with the formula XCl which is a solid with a high melting point. X world most likely be in the same group of the Periodic Table as
Answer» Na Mg Al Si Answer :B

Discussion

6255.	Element X forms a chloride with the formula XCI_2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as (a) Na (b) Mg (c) Al (d) Si
Answer» SOLUTION :As X forms the CHLORIDE with the formula `XCI_2`, it indicates that the element X is divalent. Further `XCI_2` is a solid with high melting point, it SHOWS that the chloride is ionic in nature. That further means that the element X is METALLIC in nature, such that is gives away electrons to chlorine to form the ionic chloride. These conditions are fulfilled if X is taken as Mg. Thus, OPTION (b) is correct.

Discussion

6256.	Element X forms a chloride with the formula XCI_2 which is a solid with a high melting point. X would most likely be in the same group of the periodic table as
Answer» Na Mg AI Si Answer :B

Discussion

6257.	Element X forms a chloride with formula XCI_2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as
Answer» `NA` `MG` `AI` `Si` SOLUTION :`XCI_2` indicates that it has a valency EQUAL to 2. Magnesium and other elements in this group have the valency equal to 2.

Discussion

6258.	Element with atomic number 18 belongs to
Answer» 2ND period, 8th group 3RD period, 8th group 2nd period, 18TH group 3rd period, 18th group ANSWER :D

Discussion

6259.	Element with atomic number 16 is _____
Answer» ANSWER :SULPHUR

Discussion

6260.	Element with atomic mass 14 is _____
Answer» ANSWER :NITROGEN

Discussion

6261.	Element which has most negative electron gain enthalpy is
Answer» F O Cl S Answer :C

Discussion

6262.	Elementare arranged in the ___________ order of their atomic numberto the form modern periodic table.
Answer» SOLUTION :INCREASING

Discussion

6263.	Element 'A' has Electronic confguration 2,7 'B' has configuration2,8,6, 'C' has configuration 2,8,8 while 'D' has 2,8,7. Which element will show similar chemical properties?
Answer» A and C A and D B and C B and D Solution :The elements having same number of valence electron will show SIMILAR CHEMICAL propertics. Elements A and D will show similar chemical properties.

Discussion

6264.	Electrovalentcompounds are usually
Answer» solids with low melting POINTS solids with HIGH melting points volatile LIQUIDS organic COMPOUNDS ANSWER :b

Discussion

6265.	Electroplating is one of the practical utilities of electrolysis .Copper can be coated on an iron bangle by this process. Which is the electrolyte used here ?
Answer» ANSWER :COPPER SULPHATE SOLUTION

Discussion

6266.	Electroplating is one of the practical utilities of electrolysis .Copper can be coated on an iron bangle by this process. Write down any other practical utility of electrolysis.
Answer» ANSWER :* PRODUCTION of METALS.Production of NON metals.REFINING of mtals.

Discussion

6267.	Electropositive atoms tend to form
Answer» NEGATIVE IONS positive ions covalent bonds METALLIC bonds Solution :Electropositively is the TENDENCY of an atom to lose electron

Discussion

6268.	Electroplating is one of the practical utilities of electrolysis .Copper can be coated on an iron bangle by this process. Which metal is connected to negative terminal of the battery in this process ?
Answer» ANSWER :IRON

Discussion

6269.	electrons present in theoutermost shell of an atom ___________
Answer» SOLUTION :DECREASES

Discussion

6270.	Electrons occupy the degenerate orbitals with par allel spins. How can you justify this statement with respect to stability
Answer» Solution :Sommerfeld suggested that the subenergy LEVELS or subshells associated with each main energy level are RESPONSIBLE for the FINE structure of hydrogen spec- trum. These subenergy levels or subshells EXIST due to the difference in energies of electrons revolving in different ELLIPTICAL orbits belonging to the same main energy level

Discussion

6271.	Electrons are filled in K, L and M shells in the elements of the third period.
Answer» ANSWER :TRUE

Discussion

6272.	Electrons are added to an element Y . What charge will Y have after the addition of electrons ?
Answer» SOLUTION :NEGATIVE

Discussion

6273.	Electrons are added to an element Y . Is Y oxidised or reduced ?
Answer» SOLUTION :REDUCED

Discussion

6274.	Electronic configuration of Mg is _________
Answer» (2, 8, 4) (2, 8, 1) (2, 8, 3) (2, 8, 2) SOLUTION : (2, 8, 2)

Discussion

6275.	Electronegativity of fluorine is greater than that of chlorine.
Answer» ANSWER :1

Discussion

6276.	Electronegativity of F is larger than that of Cl but electron gain enthalpy of Cl is larger than of F.(T/F)
Answer» ANSWER :TRUE

Discussion

6277.	"Electronegativity is the case of gaining electrons". (a) Which type of elements will have high electronegativity ? (b) How does electronegativity change as we move (i) across a period (ii) down a group ?
Answer» SOLUTION :(a) Non-metals (B) (i) INCREASES (II) DECREASES

Discussion

6278.	Electron deficient impurities make which type of semiconductor
Answer» <P>p type n type Both No SEMICONDUCTOR is FORMED by doping Answer :A

Discussion

6279.	Electron affinity is not a periodicproperty .
Answer» SOLUTION :CORRECT Statement : ELECTRON affinity is a PERIODICPROPERTY .

Discussion

6280.	Electron affinity is measured in …………… .
Answer» `KJ^(-)` `MOIL\|^(-)` `KJ//mol` `KJ//mol^(2)` ANSWER :C

Discussion

6281.	Electromagnetic separation is employed for the concentration of those ores in which
Answer» (a) the ORE is MAGNETIC the GANGUE is magnetic both the ore and the gangue are magnetic either the ore or the gangue is magnetic Answer :D

Discussion

6282.	Electromagnets , springsand anchorsare preparedfrom ______________.
Answer» SOLUTION :wroght IRON

Discussion

6283.	Electromagents are used to concentrate _____ ores.
Answer» ANSWER :MAGNETIC

Discussion

6284.	Electrolyte used in Hall's process ………………..
Answer» PURE alumina +molten CRYOLITE + fluorspar Pure alumina + molten BAUXITE + fluorspar Pure bauxite + molten cryolite +fluorspar Pure bauxite + molten Haematite +fluorspar Answer :A

Discussion

6285.	Electrolyte reduction of alumina into aluminium is …………… .
Answer» HALL's PROCESS Alumina THERMIC process Baeyer's process Answer :A

Discussion

6286.	Electrolysis of water in presence of Sulphuric acid to yield Hydrogen and Oxygen is what kind of reaction?
Answer» Decomposition Combination Oxidation Displacement Answer :A

Discussion

6287.	Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is
Answer» `1:1` `2:1` `4:1` `1:2` Solution :HYDROGEN and oxygen gases are produced in the molar RATIO of `2:1` on electrolysis of water `2H_(2)Ooverset("Electrolysis")(to)2H_(2)+O_(2)`

Discussion

6288.	Electrolysis of molten magnesium chloride results in the formation of 0.4 g magnesium. Calculate the volume of chlorine liberated during the reaction at STP. When an electrolytic cell consisting of molten AlCl_(3) and molten NaCl are connected in series with the above cell, calculate the amount of aluminium and sodium deposited at cathode.
Answer» Solution :`MgCl_(2) RARR MG^(+2) + 2C^(-)` For the deposition for 12 g of Mg (equivalent weight of magnesium) one faraday is required `:.` 12 g requires 1 faraday 0.4 g requires ? `= (0.14)/(12) = 0.03` Faraday 1 Faraday GIVES 11.2 L of `Cl_(2)` at STP, therefore, 0.03 faraday gives ? `= 0.336 1 L " of " Cl_(2)` at STP 1 faraday required to deposit 9 g of Al `:.` 0.03 faraday required to deposit ? = 0.27 g 1 faraday required to deposit 23 g of Na `:.` 0.03 faraday required to deposit ? `= 0.03 xx 23 = 0.69 g`

Discussion

6289.	Electrolysis of molten lead bromide is considered as redox reaction . Give reason .
Answer» SOLUTION :Because `PB^(2+)` is REDUCED and `BR^(-)` is oxidised .

Discussion

6290.	Electrolysis of aqueous CuSO_(4) with inert electrodes gives ______
Answer» Cu at CATHODE, anode GETS dissolved Cu at cathode, `O_(2)` at anode `O_(2)` at anode, `H_(2)` at cathode `O_(2)` at anode, cathode gets dissolved Answer :B

Discussion

6291.	Electrolysis is type of …….reaction
Answer» SOLUTION :DECOMPOSITION REACTION

Discussion

6292.	Electrolysis is a reaction caused of
Answer» LIGHT HEAT ELECTRICITY both heat and light ANSWER :C

Discussion

6293.	Electrolysis brings about a chemical change
Answer» ANSWER :TRUE

Discussion

6294.	Electro refining which is based on phenomenon of Electrolysis where
Answer» impure metal is MADE ANODE and PURE metal is CATHODE impure metal is cathode and pure metal is anode pure metal makes both anode and cathode none of the above Solution : impure metal is made anode and pure metal is cathode

Discussion

6295.	Electrical wires have a coating of an insulating material. The material, generally used is
Answer» Sulphur GRAPHITE PVC All can be used Solution : Graphite conducts electricity and sulphur cannot be COATED on ELECTRICAL WIRES because of reactionbetween CU and S

Discussion

6296.	Give reasons for the following : (i) School bells are made up of metals. (ii) Electrical wires are made up of copper.
Answer» SOLUTION :It is because COPPER is GOOD CONDUCTOR of ELECTRICITY.

Discussion

6297.	Eka boron is known as Germanium.
Answer» SOLUTION :EKA - BORON is KNOWN asScandium.

Discussion

6298.	Efflorescence is shown by
Answer» BLEACHING powder baking soda washing soda plaster of Paris Answer :C

Discussion

6299.	Each question contain statement-1 (Assertion) and statement-2 (Reason) Examine the statements carefully and work the correct answer according to the instruction given below : Statement - 1 : Equivalence point comes first before end point. Statement - 2 : Equivalence point cannot be obtained even by graphical method.
Answer» If both the STATEMENTS are TRUE and Statement-2 is the CORRECT EXPLANATION of the statement-1 If both the statements are True and statement-2 is not the correct explanation of statement-1 If statement-1 is true and statement-2 is FALSE. If statement-1 is false and statement-2 is True. Answer :D

Discussion

6300.	Each question contain statement-1 (Assertion) and statement-2 (Reason) Examine the statements carefully and work the correct answer according to the instruction given below : Statement - 1 : Cr_(2)O_(7)^(2-) is a self indicator. Statement - 2 : MnO_(4)^(-) acts as a self indicator.
Answer» If both the STATEMENTS are TRUE and Statement-2 is the CORRECT EXPLANATION of the statement-1 If both the statements are True and statement-2 is not the correct explanation of statement-1 If statement-1 is true and statement-2 is FALSE. If statement-1 is false and statement-2 is True. Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

Element 'X' has twelve protons in its nucleus. To which group of the periodic table it will belong?

Element X forms a chloride with the formula XCl_2, which is a solid with a high melting point. Xwould most likely be in the same group of the Periodic Table as

Element X forms a chloride with the formula XCl_(2), which is a solid with a high melting point. X would most likely be in the same group of the periodic table as ….

Element X forms a chloride with the formula XCl which is a solid with a high melting point. X world most likely be in the same group of the Periodic Table as

Element X forms a chloride with the formula XCI_2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as (a) Na (b) Mg (c) Al (d) Si

Element X forms a chloride with the formula XCI_2 which is a solid with a high melting point. X would most likely be in the same group of the periodic table as

Element X forms a chloride with formula XCI_2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as

Element with atomic number 18 belongs to

Element with atomic number 16 is _____

Element with atomic mass 14 is _____

Element which has most negative electron gain enthalpy is

Elementare arranged in the ___________ order of their atomic numberto the form modern periodic table.

Element 'A' has Electronic confguration 2,7 'B' has configuration2,8,6, 'C' has configuration 2,8,8 while 'D' has 2,8,7. Which element will show similar chemical properties?

Electrovalentcompounds are usually

Electroplating is one of the practical utilities of electrolysis .Copper can be coated on an iron bangle by this process. Which is the electrolyte used here ?

Electroplating is one of the practical utilities of electrolysis .Copper can be coated on an iron bangle by this process. Write down any other practical utility of electrolysis.

Electropositive atoms tend to form

Electroplating is one of the practical utilities of electrolysis .Copper can be coated on an iron bangle by this process. Which metal is connected to negative terminal of the battery in this process ?

electrons present in theoutermost shell of an atom ___________

Electrons occupy the degenerate orbitals with par allel spins. How can you justify this statement with respect to stability

Electrons are filled in K, L and M shells in the elements of the third period.

Electrons are added to an element Y . What charge will Y have after the addition of electrons ?

Electrons are added to an element Y . Is Y oxidised or reduced ?

Electronic configuration of Mg is _________

Electronegativity of fluorine is greater than that of chlorine.

Electronegativity of F is larger than that of Cl but electron gain enthalpy of Cl is larger than of F.(T/F)

"Electronegativity is the case of gaining electrons". (a) Which type of elements will have high electronegativity ? (b) How does electronegativity change as we move (i) across a period (ii) down a group ?

Electron deficient impurities make which type of semiconductor

Electron affinity is not a periodicproperty .

Electron affinity is measured in …………… .

Electromagnetic separation is employed for the concentration of those ores in which

Electromagnets , springsand anchorsare preparedfrom ______________.

Electromagents are used to concentrate _____ ores.

Electrolyte used in Hall's process ………………..

Electrolyte reduction of alumina into aluminium is …………… .

Electrolysis of water in presence of Sulphuric acid to yield Hydrogen and Oxygen is what kind of reaction?

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is

Electrolysis of molten lead bromide is considered as redox reaction . Give reason .

Electrolysis of aqueous CuSO_(4) with inert electrodes gives ______

Electrolysis is type of …….reaction

Electrolysis is a reaction caused of

Electrolysis brings about a chemical change

Electro refining which is based on phenomenon of Electrolysis where

Electrical wires have a coating of an insulating material. The material, generally used is

Give reasons for the following : (i) School bells are made up of metals. (ii) Electrical wires are made up of copper.

Eka boron is known as Germanium.

Efflorescence is shown by

Each question contain statement-1 (Assertion) and statement-2 (Reason) Examine the statements carefully and work the correct answer according to the instruction given below : Statement - 1 : Cr_(2)O_(7)^(2-) is a self indicator. Statement - 2 : MnO_(4)^(-) acts as a self indicator.