8881 + Interview Questions in Chemistry in Class 10 Page 96 InterviewSolution

4751.	In the reaction MnO_(2) + 4HC1 to MnC1_(2) + C1_(2) + 2H_(2)O the substance getting reduced is
Answer» `MnO_(2)` HC1 `MnC1_(2)` `C1_(2)` ANSWER :A

Discussion

4752.	In the reaction Mg + CuSO_(4) to MgSO_(4) + Cu, Mg acts as
Answer» an OXIDIZING agent a reducing agent a bleaching agent a CATALYTIC agent ANSWER :B

Discussion

4753.	In the reaction Fe + CuSO_(4) to FeSO_(4) + Cu , what is the role of Fe ?
Answer» SOLUTION :FE ACTS as a REDUCING AGENT .

Discussion

4754.	In the reactionCuO + H_(2) to Cu +H_(2)O , cupric oxide(CuO) is getting reduced to Cu.
Answer» ANSWER :T

Discussion

4755.	In the reaction ,Cu^(2+)+ Fe to Cu+Fe^(2+) the substance that is oxidized is
Answer» `CU^(2+)` `FE` `Fe^(2+)` `Cu` ANSWER :B

Discussion

4756.	In the reaction C_2H_5OH overset(KMnO_4)(to) CH_3COOH, KMnO_4acts as
Answer» DEHYDRATING AGENT reducing agent OXIDISING agent bleaching agent Answer :C

Discussion

4757.	In the reaction between silver nitrate and sodium chloride, the spectator ion is ____
Answer» `Ag^(+)` `CL^(-)` `NO_(3)^(-)` All of these Solution :In the GIVEN reaction , `NA^(+) and NO(3)^(-)` are spectator IONS

Discussion

4758.	In the reaction A+B^(+)toA^(+)+B, A is
Answer» oxidised reduced an OXIDISING AGENT being reduced Solution :In the reaction A has lost one `E^(-)` HENCE A is being oxidised and is a reducing agent.

Discussion

4759.	In the reaction 6CIO_(2)^(-)rarr 4CIO_(3)^(-)+2CI^(-), CI^(-) ion is
Answer» Oxidised Reduced Odixised and reduced Neither Oxidised nor reduced Answer :C

Discussion

4760.	In the reaction4Fe + 3O_(2) to 2Fe_(2)O_(3). Fe acts as an oxidizing agent.
Answer» ANSWER :F

Discussion

4761.	In the reaction 3Mg + N_(2) rarr Mg_(3) N_(2), Nitrogen is oxidised or reduced.
Answer» ANSWER :REDUCED

Discussion

4762.	In the reaction ,2H_(2)+O_(2) to 2H_(2)O hydrogen is the _____ agent and oxygen is the_____ agent.
Answer» SOLUTION :REDUCING , OXIDIZING

Discussion

4763.	In the reaction: 2FeC1_(2) + C1 to 2FeC1_(3) Chlorine may be regarded as
Answer» an OXIDISING agent a REDUCING agent a catalyst providing an INERT medium Answer :A

Discussion

4764.	In the reaction, 2FeCl_(2)+Cl_(2) to 2FeCl_3, chlorine may be regarded as
Answer» An OXIDIZING agent a REDUCING agent A catalyst Providing an INERT medium Answer :A

Discussion

4765.	In the reaction 2FeC1_(2) + SnC1_(2) to 2FeC1_(2) + SnC1_(4)
Answer» `Fe^(+1)` REDUCED to `Fe^(+2)` `Sn^(+2)` is reduced to `Sn^(+1)` `Sn^(+2)` oxidized to `Sn` `Fe^(+1)` gains two electrons Solution :`2 overset (+3) (FeC1_(3)) + overset (+2) (SNC1_(2)) to overset (+2) (2FeC1_(2)) + overset (+4) (SnC1_(4)` `Fe^(3+)` is reduced to `Fe^(2+)` (GAIN of ELECTRON) and `Sn^(2+)` is oxidised to `Sn^(4+)` (LOSS of two electrons)

Discussion

4766.	In the reactio : NO_(2) + CO hArr NO + CO_(2) , the equilibrium state may be recognised by the constancy of colour.
Answer» ANSWER :1

Discussion

4767.	In the process of reduction of concentrated ore to zinc spelter, ZnO is made into briquettes. Give reason.
Answer» Solution :(i) Comparison between briquette and powder form. (ii) Furnace in which the reduction of CONCENTRATED ore takes place. (iii) Process of reduction. (iv) PHYSICAL state of the raw material inwhich they react. (V) Physical state of the PRODUCT.

Discussion

4768.	In the presence of hydrogen ions , a zinc ion ________ reduced .
Answer» SOLUTION :will not be

Discussion

4769.	In the presence of hydroxide ion, a sulphate ion ________ oxidised .
Answer» SOLUTION :will not be

Discussion

4770.	In the preparation of iron (III) chloride by the action of dry chlorine on hot iron, heating is discontinued once the reaction starts. Give reason.
Answer» SOLUTION :Because the REACTION between iron and CHLORINE is HIGHLY exothermic.

Discussion

4771.	In the periodic table where are the metalloids placed?
Answer» SOLUTION :The metalloids are elements which lie along theborder of the zig zag line which separates metals PLACED on the left SIDE from non-metals placed on the right side.

Discussion

4772.	Horizontal rows of periodic table are called
Answer» SOLUTION :PERIODS

Discussion

4773.	In the periodic table , the horizontal rows are called ……………….and vertical columns are called …………… .
Answer» SOLUTION : PERIODS, GROUPS

Discussion

4774.	Horizontal rows in modern periodic table.
Answer» ANSWER :PERIODS

Discussion

4775.	In the Periodic Table, a straight line seperates metals from non-metals.
Answer» SOLUTION :FALSE - A zig-zag LINE SEPARATES the METALS from the non-metals.

Discussion

4776.	In theP vs V graph of CO_(2) gas given below, account for thereduction in the horizontal portion of the graph with increase in temperature.
Answer» SOLUTION :(i) difference between real gas and IDEAL gas (ii) analysis of the pattern of thecurves given inthegraph (iii) analysis of the kind of gradual change in the CURVES with thechange oftemperature (iv) analysis of the change in volume with thechange in pressure in case of each curve (v) analysis of the reason BEHIND thechange

Discussion

4777.	In the oxidation of ethanol with acidified potassium dichromate, the final product is____ (acetic acid/formic acid)
Answer» SOLUTION :ACETIC ACID

Discussion

4778.	In the nucleus of ""_(20)Ca^(40), there are ……….. .
Answer» 10 protons and 40 NEUTRONS 20 protons and 20 neutrons 20 protons and 40 electrons 40 protons and 20 electrons Solution :Hint : `""_(20)CA^(40)"20 = Atomic number = Number of protons (or) Number of electrons"` `"40 = Mass number = Number of protons"+"Number of neutrons"` `THEREFORE ""_(20)Ca^(40)` contains 20 protons, 20 electrons and 20 neutrons.

Discussion

4779.	In the Modern Perodic table, the elements placed at the bottom of the periodic table are called as ________ elements.
Answer» SOLUTION :INNER TRASITION

Discussion

4780.	In the modern periodic table, which one is most correct about a period?
Answer» The FIRST element is an ALKALI metal, and the last element is a HALOGEN. The first element is a noble gas, and the last one is an alkali metal. The first element is an alkali metal, and the last element is a noble gas. Each element is a NONMETAL. Solution :The first element is an alkali metal, and the last element is a noble gas.

Discussion

4781.	In the modern periodic table, which are the metals among the first ten elements ?
Answer» Solution :The first ten elements of the modern PERIODIC table are as FOLLOWS: `""_(1)H.""_(2)He,""_(3)Li,""_(4)Be,""_(5)B,""_(6)C,""_(7)N,""_(8)O,""_(9)F and ""_(10)NE`. Among these elements Li and Be are metals.

Discussion

4782.	In the Modern Periodic Table, which are the metals among the first ten elements?
Answer» Solution :FIRST TEN ELEMENTS are : H, He, Li, Be, B, C, N, O, F, Ne. Only TWO elements Li and Be are metals.

Discussion

4783.	In the Modern Periodic Table, which are metals among the first ten elements?
Answer» Solution :The first ten elements are : H, He, Li, Be, B, C, N, O, F, Ne. Among these, only TWO elements Li (lithium) and Be (BERYLLIUM) are METALS.

Discussion

4784.	In the modern periodic table which arc the metals among the first ten elements.
Answer» Solution :Metals among first TEN ELEMENTS are LITHIUM, beryllium

Discussion

4785.	In the Modern Periodic table, the elements are arranged in accordance with their __________ .
Answer» SOLUTION :ATOMIC NUMBERS

Discussion

4786.	In the modern Periodic Table, the elements are arranged in
Answer» INCREASING mass increasing ATOMIC volume increasing atomic number incresing atomic weight Answer :C

Discussion

4787.	In the modern periodic table, noble gases are placed in group …………..
Answer» ANSWER :18

Discussion

4788.	In the Modern Periodic Table, elements with similar valenceshell configuration are placed in
Answer» same group different GROUPS same PERIOD none of above ANSWER :A

Discussion

4789.	In the modern periodic table, elements are arranged in
Answer» ANSWER :ATOMIC NUMBER

Discussion

4790.	In the modern periodic table, elements are classified according to their________. (atomic masses/atomic number)
Answer» SOLUTION :ATOMIC NUMBER

Discussion

4791.	In the Modern Periodic Table, element helium is placed at the
Answer» TOP LEFT corner BOTTOM left corner top right corner bottom right corner Answer :C

Discussion

4792.	In the modern periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium ?
Answer» Solution : Elements with atomic number 12 and 38 have 2 electrons in their last SHELL like calcium. So, they will RESEMBLE Ca in their chemical properties.

Discussion

4793.	In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium?
Answer» Solution :The atomic numbers of three elements which lie in the same group are 12, 20 and 38. So, the elementshaving atomic numbers 12 and 38 have PHYSICAL and chemical properties resembling with CALCIUM.

Discussion

4794.	In the modern periodic table, 'A' and 'B' are two elements belonging to first and seventeenth group respectively and both of them belong to the third period. Write their electronic configuration. Which of them is a metal? Why? Write the chemical formula of the compound obtained when these two elements react with each other.
Answer» Solution :The two elements belongs to first and seventeenth group and third period is .A.. Sodium (NA) and .B. - Chlorine (CI) Na : 2,8, 1 CI: 2, 8, 7 A(Sodium) will be the METAL, because it has a single electron in its outer shell, which READILY donates, creating a positively charged ion the Na cation. `Na^(+) + Cl^(-) to NaCl` When sodium REACTS with chlorine to GET sodium chloride.

Discussion

4795.	In the modern periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Answer» SOLUTION :The elements withatomic NUMBER 12has same CHEMICAL properties as that of CALCIUM this is because both of them have same number of VALENCE electron (2)

Discussion

4796.	In the Moder Periodic table, which are the metals among the first ten elements ?
Answer» SOLUTION :Among the first TEN elements lithium (Li) and beryllium (Be) are METALS

Discussion

4797.	In the Modem Periodic Table, which are the metals among the first ten elements ?
Answer» SOLUTION :Lithium and beryllium are the METALS among the first TEN elements in the MODEM Periodic Table.

Discussion

4798.	In the metallurgy of iron using blast furnace, the slag is
Answer» `FeSiO_(3)` `CaSiO_(3)` `CaCO_(3)` `CaSO_(3)` Solution :`UNDERSET("gangue")(SiO_(2))+underset("FLUX")(CaO)to underset("slag")(CaSiO_(3))`

Discussion

4799.	In the manufacture of sugar, the container of the sugarcane juice is connected to a vaccum pump. Why?
Answer» Solution :(i) To evaporate WATER at low TEMPERATURE (II) To obtain SUGAR at low temperature (iii) EVAPORATION is smooth

Discussion

4800.	In the long form of the periodic table, ________ group elements can release maximum amount of energy by the addition of electron into is valence shell.
Answer» ANSWER :VII

Discussion

Explore topic-wise InterviewSolutions in .

In the reaction MnO_(2) + 4HC1 to MnC1_(2) + C1_(2) + 2H_(2)O the substance getting reduced is

In the reaction Mg + CuSO_(4) to MgSO_(4) + Cu, Mg acts as

In the reaction Fe + CuSO_(4) to FeSO_(4) + Cu , what is the role of Fe ?

In the reactionCuO + H_(2) to Cu +H_(2)O , cupric oxide(CuO) is getting reduced to Cu.

In the reaction ,Cu^(2+)+ Fe to Cu+Fe^(2+) the substance that is oxidized is

In the reaction C_2H_5OH overset(KMnO_4)(to) CH_3COOH, KMnO_4acts as

In the reaction between silver nitrate and sodium chloride, the spectator ion is ____

In the reaction A+B^(+)toA^(+)+B, A is

In the reaction 6CIO_(2)^(-)rarr 4CIO_(3)^(-)+2CI^(-), CI^(-) ion is

In the reaction4Fe + 3O_(2) to 2Fe_(2)O_(3). Fe acts as an oxidizing agent.

In the reaction 3Mg + N_(2) rarr Mg_(3) N_(2), Nitrogen is oxidised or reduced.

In the reaction ,2H_(2)+O_(2) to 2H_(2)O hydrogen is the _____ agent and oxygen is the_____ agent.

In the reaction: 2FeC1_(2) + C1 to 2FeC1_(3) Chlorine may be regarded as

In the reaction, 2FeCl_(2)+Cl_(2) to 2FeCl_3, chlorine may be regarded as

In the reaction 2FeC1_(2) + SnC1_(2) to 2FeC1_(2) + SnC1_(4)

In the reactio : NO_(2) + CO hArr NO + CO_(2) , the equilibrium state may be recognised by the constancy of colour.

In the process of reduction of concentrated ore to zinc spelter, ZnO is made into briquettes. Give reason.

In the presence of hydrogen ions , a zinc ion ________ reduced .

In the presence of hydroxide ion, a sulphate ion ________ oxidised .

In the preparation of iron (III) chloride by the action of dry chlorine on hot iron, heating is discontinued once the reaction starts. Give reason.

In the periodic table where are the metalloids placed?

Horizontal rows of periodic table are called

In the periodic table , the horizontal rows are called ……………….and vertical columns are called …………… .

Horizontal rows in modern periodic table.

In the Periodic Table, a straight line seperates metals from non-metals.

In theP vs V graph of CO_(2) gas given below, account for thereduction in the horizontal portion of the graph with increase in temperature.

In the oxidation of ethanol with acidified potassium dichromate, the final product is____ (acetic acid/formic acid)

In the nucleus of ""_(20)Ca^(40), there are ……….. .

In the Modern Perodic table, the elements placed at the bottom of the periodic table are called as ________ elements.

In the modern periodic table, which one is most correct about a period?

In the modern periodic table, which are the metals among the first ten elements ?

In the Modern Periodic Table, which are the metals among the first ten elements?

In the Modern Periodic Table, which are metals among the first ten elements?

In the modern periodic table which arc the metals among the first ten elements.

In the Modern Periodic table, the elements are arranged in accordance with their __________ .

In the modern Periodic Table, the elements are arranged in

In the modern periodic table, noble gases are placed in group …………..

In the Modern Periodic Table, elements with similar valenceshell configuration are placed in

In the modern periodic table, elements are arranged in

In the modern periodic table, elements are classified according to their________. (atomic masses/atomic number)

In the Modern Periodic Table, element helium is placed at the

In the modern periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium ?

In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21 and 38. Which of these have physical and chemical properties resembling calcium?

In the modern periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?

In the Moder Periodic table, which are the metals among the first ten elements ?

In the Modem Periodic Table, which are the metals among the first ten elements ?

In the metallurgy of iron using blast furnace, the slag is

In the manufacture of sugar, the container of the sugarcane juice is connected to a vaccum pump. Why?

In the long form of the periodic table, ________ group elements can release maximum amount of energy by the addition of electron into is valence shell.

In the reaction ,2H_(2)+O_(2) to 2H_(2)O hydrogen is the _ agent and oxygen is the_ agent.