8881 + Interview Questions in Chemistry in Class 10 Page 81 InterviewSolution

4001.	Name two metals that do not react with water at all.
Answer» SOLUTION :LEAD and COPPER.

Discussion

4002.	Name two metals that start floating after sometime when immersed in water and explain why they do so.
Answer» Solution :The two METALS are : (i) Calcium (Ca) (II) Magnesium (Mg) They start floating because the bubbles of HYDROGEN gas which are formed during the reaction stick to the surface of the METAL.

Discussion

4003.	Name two metals each one of which has one electron in its outermost shell.
Answer» SOLUTION :LITHIUM (2, 1) and sodium (2, 8, 1).

Discussion

4004.	Name two metals than can be used to reduce metal oxides of metals.
Answer» SOLUTION :ALUMINIUM, MAGNESIUM

Discussion

4005.	Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis of your choice?
Answer» Solution : Beryllium (Be) and Calcium (Ca) are the two elements which will show CHEMICAL reactions similar tomagnesium because Be and Ca BELONG to the same group (group 2) of the Periodic Table asmagnesium (group 2). All of these have same number of ELECTRONS (i.e., 2) in their OUTERMOST shell.

Discussion

4006.	Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice ?
Answer» SOLUTION :Calcium and STRONTIUM would show chemical REACTIONS similar to magnesium. They have the same number of electrons in the OUTERMOST (valence) shell.

Discussion

4007.	Name two elements with filled outermost shell.
Answer» SOLUTION :NEON (2, 8) and ARGON (2, 8, 8).

Discussion

4008.	Name two elentents you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?
Answer» Solution :CALCIUM (CA) andStrontium (SR) are expectedtoshow chemical reactions SIMILAR toMagnesium (Mg).This is because the number of valence ELECTRON (2) is because in all these three elements andsince chemical properties are due tovalence electrons,they show same chemical reactions.

Discussion

4009.	Name two elements which show chemical reactions similar to magnesium.
Answer» SOLUTION :CALCIUM and STRONTIUM show CHEMICAL reactions SIMILAR to magnesium.

Discussion

4010.	Name two elements which were placed in the same slot in Newlands' octaves.
Answer» SOLUTION :COBALT and NICKEL

Discussion

4011.	Name two elements which formed compound on which Mendeleev had concentrated.
Answer» SOLUTION :HYDROGEN and OXYGEN

Discussion

4012.	Name two elements of first period in modern periodic table.
Answer» SOLUTION :HYDROGEN and HELIUM.

Discussion

4013.	nametwo conventional sources of energy.
Answer» SOLUTION :COAL and PETROLEUM

Discussion

4014.	Name three elements with seven valence electrons in their outermost shell. How do their non-metallic character and atomic size change down the group?
Answer» SOLUTION :Three elements which have seven valence electrons in their outermost shell are fluorine, chlorine, and bromine (or any other group 17 elements / halogens). Their non-metallic character DECREASES while atomic SIZE INCREASES down the group.

Discussion

4015.	Name : three elements that have a single electron in their outermost shells.
Answer» SOLUTION :Lithium (LI), sodium (Na) and potassium (K)

Discussion

4016.	Name three elements discovered after Mendeleev gave his Periodic Table.
Answer» SOLUTION :SCANDIUM, GALLIUM and GERMANIUM.

Discussion

4017.	Name the type of the following reaction: Zn + H_(2)SO_(4) to ZnSO_(4) +H_(2)
Answer» SOLUTION :This is a SINGLE DISPLACEMENT REACTION .

Discussion

4018.	Name the type of reaction represented by the following equation : 4NH_(3)(g) +5O_(2)(g) to 4NO(g) + 6H_(2)O(g)
Answer» SOLUTION :OXIDATION - REDUCTION or REDOX REACTION.

Discussion

4019.	Name the type of reaction occurring in the above activity.
Answer» SOLUTION : DISPLACEMENT REACTION OCCURS in the above ACTIVITY.

Discussion

4020.	Name the type of reaction in which energy is abdorbed.
Answer» SOLUTION :ENDOTHERMIC.

Discussion

4021.	Name the type of ore which is concentrated by froth floatation process.
Answer» SOLUTION :SULPHIDE ORES

Discussion

4022.	Name the type of chemical reaction represented by the following equations : Zn(s)+H_(2)SO_(4)toZnSO_(4)(aq)+H_(2)(g)
Answer» SOLUTION :`ZN(s)+H_(2)SO_(4)toZnSO_(4)(aq)+H_(2)(g)` This is a displacement reaction.

Discussion

4023.	Name the type of chemical reaction represented by the following equations : CaO(s)+H_(2)O(l)toCa(OH)_(2)(aq)
Answer» Solution :`CaO(s)+H_(2)O(L)toCa(OH)_(2)(aq)` This is a combination REACTION.

Discussion

4024.	Name the type of chemical reaction represented by the following equation: (i) CaO+H_(2)OrarrCa(OH)_(2) (ii) 3BaCl_(2)+Al_(2)(SO_(4))_(3)rarr2AlCl_(3)+3BaSO_(4) (iii) 2FeSO_(4)overset("Heat")rarrFe_(2)O_(3)+SO_(2)+SO_(3)
Answer» SOLUTION :(i) COMBINATION reaction (ii) Double displacement reaction (III) DECOMPOSITION reaction

Discussion

4025.	Name the type of chemical reaction represented by the following equations : CaCO_(3)(s)overset("Heat")(to)CaO(s)+CO_(2)(g)
Answer» Solution :`CaCO_(3)(s)OVERSET("Heat")(to)CaO(s)+CO_(2)(g)` This is a DECOMPOSITION REACTION.

Discussion

4026.	Name the type of chemical reaction represented by the following equation. CaO+H_(2)O to Ca(OH)_(2) 3BaCl_(2)+Al_(2)(SO_(4))_(3) to 3BaSO_(4)+2AlCl_(3) 2FeSO_(4)overset("heat")to Fe_(2)O_(3)+SO_(2)+SO_(3)
Answer» Solution :COMBINATION Reaction. Double DISPLACEMENT reaction. DECOPOSITION reaction.

Discussion

4027.	Name the two allotropes of carbon.
Answer» SOLUTION :DIAMOND and GRAPHITE.

Discussion

4028.	Name the three products of chlor-alkali process. Write one commerically or industrially important material such that can be prepared from each of these products.
Answer» Solution :The three products are: Sodium HYDROXIDE (NaOH), Chlorine `(Cl_2)` and Hydrogen `(H_2)`. NaOH- for SOAPS and detergents and paper making or artificial FIBERS. `Cl_2`- PVC, pesticides, CFCS. `H_2`- fuels , MARGARINE, `NH_3` for fertilizers.

Discussion

4029.	Name the three common defects of vision. What are their causes? Name the type of lens used to correct each of them.
Answer» Solution :i) MYOPIA : CAUSE : ELONGATION of eyeball. Types of lens used for correction, CONCAVE lens of suitable power. ii) Hypermetropia : Cause : Shrinking of eyeball Types of lens used for correction : Convex lens of suitable power. iii) Prerbyopia : Cause : Weakening of ciliary muscles. Type of lens used for correction : BIFOCAL lens.

Discussion

4030.	Name the term used to indicate the development of unpleasant smell and taste in fat and oil containing fooddue to oxidation . What are anti-oxidants ? Why are they added to fat and oil containing food.
Answer» SOLUTION :Antioxidants are substances that INHIBIT OXIDATION, especially one used to counter act the deterioration of stored food products. Antioxidants are added to the food materials CONTAINING fats and OILS to prevent their oxidation. Oxidation of food materials containing fats and oils is known as rancidity because of which the food becomes unfit for consumption and develop bad odour.

Discussion

4031.	Name the substances which on treatment with chlorine yields bleaching powder .
Answer» Solution :Dry SLAKED LIME `CA(OH)_2`

Discussion

4032.	Name the substance which should be added to acetic acid to test its acidic character.
Answer» SOLUTION :SODIUM BICARBONATE (`NaHCO_(3)`)

Discussion

4033.	Name the substance which is used to prepare blue-black ink
Answer» `FE(OH)_(2)` `Fe_(2)(SO_(4))_(3)` `FeSO_(4)` `Fe_(2)O_(3)` ANSWER :C

Discussion

4034.	Name the substance used in salt-bridge.
Answer» ANSWER :`NH_(4)CI` or KCI

Discussion

4035.	Name the substance oxidised and reduced, and also identify the oxidising agents and reducing agents in the following reactions : 3MnO_(2)+4Al to3Mn+2Al_(2)O_(3)
Answer» SOLUTION :`3MnO_(2)+4Al to3Mn+2Al_(2)O_(3)` `MnO_(2)` is REDUCED because O has been REMOVED from it to give Mn. AL has been oxidised because O has been added to it to obtain `Al_(2)O_(3).MnO_(2)` is the oxidising agent while Al is REDUCING agent.

Discussion

4036.	Name the substance oxidised and reduced, and also identify the oxidising agents and reducing agents in the following reactions : H_(2)S+SO_(2)toS+H_(2)O
Answer» Solution :`2H_(2)S+SO_(2)to3S+2H_(2)O` `H_(2)S` has lost H to change into S. Thus, it has been oxidised. `SO_(2)` has lost O to change into S. Thus, it has been reduced. `H_(2)S` has ACTED as REDUCING agent while `SO_(2)` has acted as oxidising agent.

Discussion

4037.	Name the substance that is produced from baking soda and is used in the removal of permanent hardness of water.
Answer» SOLUTION :SODIUM CARBONATE

Discussion

4038.	Name the substance oxidised and reduced, and also identify the oxidising agents and reducing agents in the following reactions : Fe_(2)O_(3)+3COto2Fe+3CO_(2)
Answer» SOLUTION :`Fe_(2)O_(3)+3COto2Fe+3CO_(2)` `Fe_(2)O_(3)` is REDUCED because oxygen has been reduced and CO is oxidised because O has been ADDED to it. `Fe_(2)O_(3)` has acted as oxidising agent and CO has acted as reducing agent.

Discussion

4039.	Name the substance obtained by the action of chlorine on dry slaked lime .
Answer» SOLUTION :Bleacing POWDER.

Discussion

4040.	Name the substance having functional group -OH.
Answer» ALCOHOL KETONE Ester Carboxylic ACID ANSWER :A

Discussion

4041.	Name the stages of metallurgy (do not describe).
Answer» SOLUTION :Selection of a SUITABLE ORE, its concentration, ISOLATION and refining of metal are the main steps of metallurgy

Discussion

4042.	Name the solution which is used for dissolving gold.
Answer» SOLUTION :AQUA REGIA

Discussion

4043.	Name the sodium compound which is used for softening hard water .
Answer» SOLUTION :WASHING SODA (SODIUM CARBONATE )

Discussion

4044.	Name the simplest ketone and give its structural formula.
Answer» Solution :SIMPLEST ketone contains three CARBON atom CHAIN with the molecular formula `C_(3)H_(6)O` `CH_(3)-underset(O)underset(\|\|)(C)-CH_(3)` [Acetone] (propane)

Discussion

4045.	Name the simplest ketone.
Answer» Answer :The SIMPLEST KETONE is ACETONE. e g., `CH_(3)COCH_(3)`.

Discussion

4046.	Name the shining property of metal.
Answer» Solution :The PROPERTY of SHINING SURFACE of metal is KNOWN as metallic LUSTRE.

Discussion

4047.	Name the scientist whose experimental work shattered the vital force theory.
Answer» SOLUTION :FRIEDRICH WOHLER

Discussion

4048.	Name the scientist who gave the law of octaves ?
Answer» Mendeleev Newlands Dolton Dobcreiner Answer :B

Discussion

4049.	Name the salts that are used inblack andwhite photography. Give reactions when they are exposed to light . Define the type of chemical reaction taking place.
Answer» Solution :Silver chloride (AgCl) and Silver bromide (AGBR) `2AgCl overset ("Sunlight")rarr2Ag+Cl_(2)` `2AgBr overset("Sunlight")rarr2Ag+Br` Those RECTIONS in which energy is absorbed (in from of heat, light or electricity ) to BREAK down the RECTANTS is called DECOMPOSITION reaction .

Discussion

4050.	Name the reduching agent in the following reaction. 3MnO_(2)+4Al to 2Al_(2)O_(3)+3Mn. State which is more reactive - Mn or Al and why ?
Answer» SOLUTION :Al is the reducing agent, since it is UNDERGOING oxidation. Al is more REACTIVE as it DISPLACES Mn from its aqueous solution.

Discussion

Explore topic-wise InterviewSolutions in .

Name two metals that do not react with water at all.

Name two metals that start floating after sometime when immersed in water and explain why they do so.

Name two metals each one of which has one electron in its outermost shell.

Name two metals than can be used to reduce metal oxides of metals.

Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis of your choice?

Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice ?

Name two elements with filled outermost shell.

Name two elentents you would expect to show chemical reactions similar to magnesium. What is the basis for your choice?

Name two elements which show chemical reactions similar to magnesium.

Name two elements which were placed in the same slot in Newlands' octaves.

Name two elements which formed compound on which Mendeleev had concentrated.

Name two elements of first period in modern periodic table.

nametwo conventional sources of energy.

Name three elements with seven valence electrons in their outermost shell. How do their non-metallic character and atomic size change down the group?

Name : three elements that have a single electron in their outermost shells.

Name three elements discovered after Mendeleev gave his Periodic Table.

Name the type of the following reaction: Zn + H_(2)SO_(4) to ZnSO_(4) +H_(2)

Name the type of reaction represented by the following equation : 4NH_(3)(g) +5O_(2)(g) to 4NO(g) + 6H_(2)O(g)

Name the type of reaction occurring in the above activity.

Name the type of reaction in which energy is abdorbed.

Name the type of ore which is concentrated by froth floatation process.

Name the type of chemical reaction represented by the following equations : Zn(s)+H_(2)SO_(4)toZnSO_(4)(aq)+H_(2)(g)

Name the type of chemical reaction represented by the following equations : CaO(s)+H_(2)O(l)toCa(OH)_(2)(aq)

Name the type of chemical reaction represented by the following equation: (i) CaO+H_(2)OrarrCa(OH)_(2) (ii) 3BaCl_(2)+Al_(2)(SO_(4))_(3)rarr2AlCl_(3)+3BaSO_(4) (iii) 2FeSO_(4)overset("Heat")rarrFe_(2)O_(3)+SO_(2)+SO_(3)

Name the type of chemical reaction represented by the following equations : CaCO_(3)(s)overset("Heat")(to)CaO(s)+CO_(2)(g)

Name the type of chemical reaction represented by the following equation. CaO+H_(2)O to Ca(OH)_(2) 3BaCl_(2)+Al_(2)(SO_(4))_(3) to 3BaSO_(4)+2AlCl_(3) 2FeSO_(4)overset("heat")to Fe_(2)O_(3)+SO_(2)+SO_(3)

Name the two allotropes of carbon.

Name the three products of chlor-alkali process. Write one commerically or industrially important material such that can be prepared from each of these products.

Name the three common defects of vision. What are their causes? Name the type of lens used to correct each of them.

Name the term used to indicate the development of unpleasant smell and taste in fat and oil containing fooddue to oxidation . What are anti-oxidants ? Why are they added to fat and oil containing food.

Name the substances which on treatment with chlorine yields bleaching powder .

Name the substance which should be added to acetic acid to test its acidic character.

Name the substance which is used to prepare blue-black ink

Name the substance used in salt-bridge.

Name the substance oxidised and reduced, and also identify the oxidising agents and reducing agents in the following reactions : 3MnO_(2)+4Al to3Mn+2Al_(2)O_(3)

Name the substance oxidised and reduced, and also identify the oxidising agents and reducing agents in the following reactions : H_(2)S+SO_(2)toS+H_(2)O

Name the substance that is produced from baking soda and is used in the removal of permanent hardness of water.

Name the substance oxidised and reduced, and also identify the oxidising agents and reducing agents in the following reactions : Fe_(2)O_(3)+3COto2Fe+3CO_(2)

Name the substance obtained by the action of chlorine on dry slaked lime .

Name the substance having functional group -OH.

Name the stages of metallurgy (do not describe).

Name the solution which is used for dissolving gold.

Name the sodium compound which is used for softening hard water .

Name the simplest ketone and give its structural formula.

Name the simplest ketone.

Name the shining property of metal.

Name the scientist whose experimental work shattered the vital force theory.

Name the scientist who gave the law of octaves ?

Name the salts that are used inblack andwhite photography. Give reactions when they are exposed to light . Define the type of chemical reaction taking place.

Name the reduching agent in the following reaction. 3MnO_(2)+4Al to 2Al_(2)O_(3)+3Mn. State which is more reactive - Mn or Al and why ?