8881 + Interview Questions in Chemistry in Class 10 Page 85 InterviewSolution

4201.	Name of the following Distinctive reaction that takes place when ethanol is treated with acetic acid.
Answer» SOLUTION :ESTERIFICATION

Discussion

4202.	Give suitable chemical terms for the following: A reaction in which hydrogen of an alkane is replaced by a halogen.
Answer» SOLUTION :HALOGENATION

Discussion

4203.	Name of the following A hydrocarbon which contributes towards the greenhouse effect.
Answer» SOLUTION :METHANE

Discussion

4204.	Name of process by which unsaturated fats are changed to saturarted fats.
Answer» ANSWER :HYDROGENATION.

Discussion

4205.	Name:(i) three elements that have only a single electron in their outermost shells.(ii) two elements that have two electrons in their valence shells.(iii) three elements with completely filled outermost shells.
Answer» SOLUTION :

Discussion

4206.	Name five ways to prevent rusting .
Answer» SOLUTION :1. OILING and GREASING 2. PAINTING 3. Galvanization 4. Electroplating 5. Alloying.

Discussion

4207.	Name four alkaline earth metals and to which group do they belong?
Answer» Solution :The four alkaline EARTH METALS are BERYLLIUM Magnesium. CALCIUM and Strontium.

Discussion

4208.	Name different types of chemical reactions, and explain it with suitable example.
Answer» Solution :NAME of different types of chemical reactions with suitable example are given below: 1. Combination reaction : Two or more than two reactants COMBINE together to form a single product. For example, `CAO(s) + H_(2)O(I) to Ca(OH)_(2)(aq)` 2. Decomposition reaction : A single reactant, on heating decomposes to form more than one product. For example, `CaCO_(3)(s) overset("Heat")toCaO(s) + CO_(2)(g)` 3. Displacement reaction : More reactive METAL displaces the less reactive metal from its compound. For example, `Fe(s) + CuSO_(4)(aq) to FeSO_(4)(aq) + Cu(s)` 4. Double displacement reaction: In this an exchange of ions occurs between two compounds. For example, `Na_(2)SO_(4)(aq) + BaCl_(2)(aq) to BaSO_(4)(s) + 2NaCl(aq)` 5. Oxidation reaction : A reaction in which oxygen is added or hydrogen is removed is called an oxidation reaction. For example, `C(s) + O_(2)(g) to CO_(2)(g)` 6. Reduction reaction : A reaction in which hydrogen is added or oxygen is removed is called reduction reaction. For example, `CuO + H_(2) to Cu + H_(2)O` 7. Precipitation reaction: In this reaction, insoluble salt is formed. For example, `AgNO_(3)+NaCl to underset("Precipitate")(AgCl)+NaNO_(3)`

Discussion

4209.	Name any two substances which do not contain water of crystallization.
Answer» SOLUTION :sodium HYDROGENCARBONATE `(NaHCO_(3) ) and ` sodium CHLORIDE (NACI)

Discussion

4210.	Name any two metals that react with cold water very quickly. Write the products formed when these metals react with cold water.
Answer» Solution :Lithium, Sodium, Potassium, Calcium reacts with COLD water very quickly. All of these METALS react vigorously or EVEN explosively with cold water. In each case, a solution of the metal hydroxide is produced together with hydrogen gas. `2x(s) + 2H_2O (l) to 2xOH (aq) + H_2 (G)` Ex: `2K (s) + 2H_2O (l) to 2KOH (aq) + H_2(g)` Potassium Water Potassium hydroxide Hydrogen

Discussion

4211.	Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations ? Write the formula of oxide of any of the above said element.
Answer» Solution :(i) TWO elements of GROUP 1 are Na, K / Sodium, potassium. Electronic CONFIGURATIONS Na = 2,8,1, K = 2,8,8,1 (ii) SIMILARITY : Both have one valence electron / One electron in outermost shell. Oxide : `Na_(2)O //K_(2)O`.

Discussion

4212.	Name any two elements that have two electrons in their valence shell.
Answer» SOLUTION :(i) Magnesium : 2, 8, 2 (ii) Calcium : 2, 8, 8, 2.

Discussion

4213.	Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid element
Answer» SOLUTION :Two elements of group I are Sodium (Na) and potassium (K). Their electronic configurations: Na = 2,8,1, K = 2,8,8,1 SIMILARITY: Both have one VALENCE electron. Formula of their oxides: `Na_2O, K_2O`

Discussion

4214.	Name any three substances which fromtrue solutions when dissolved in water.
Answer» SOLUTION :SODIUM CHLORIDE, SUGAR and ALUM

Discussion

4215.	Name any three common indicators which are usually used in laborations.
Answer» SOLUTION :LITMUS, METHYL ORANGE and PHENOLPHTHALEIN.

Discussion

4216.	Name and state the law which is kept in mind when we balance a chemical equation.
Answer» SOLUTION :LAW of CONSERVATION of MASS.

Discussion

4217.	Name and state the law which is kept in mind while we balanced a chemical equation
Answer» Solution :LAW of conservation of MASS . i.e, Mass can neither be CREATED nor DESTROYED during a CHEMICALREACTION.

Discussion

4218.	Name and draw the chain structure and dot structure of first two alkanes.
Answer» SOLUTION :(i) METHANE

Discussion

4219.	Name an ore of iron.
Answer» SOLUTION :HAEMATITE

Discussion

4220.	Name an ore of aluminium and write its formula.
Answer» SOLUTION :BAUXITE `(Al_2 O_3 * 2H_2 O)`

Discussion

4221.	Name an indicator which tells various levels of H^+ ion concentration.
Answer» SOLUTION :Universal INDICATOR which is a mixture of a NUMBER of INDICATORS.

Discussion

4222.	Name an indicator which can act as self-indicator.
Answer» ANSWER :`KMnO_(4)`

Discussion

4223.	Name an element which has twice as many electrons in its second shell as in the first shell.
Answer» SOLUTION :CARBON (Z = 6 = 2, 4)

Discussion

4224.	Name an element which has a total of two shells and there are three electrons in its valence shell.
Answer» SOLUTION :Boron (Z = 5 = 2, 3)

Discussion

4225.	Name an element which has a total of three shells and there are four electrons in its valence shell.
Answer» Solution :SILICON (Z = 14 = 2, 8, 4)

Discussion

4226.	Name an element, other than carbon, which exhibits the property of catenation upto seven or eight atoms. Are these compounds stable ?
Answer» SOLUTION :SILICON also exhibits the PROPERTY of CATENATION. Compounds of silicon are not stable.

Discussion

4227.	Name an element that has two shells each one of which is completely filled with electrons.
Answer» Solution :Neon has COMPLETELY filled K and L SHELLS as NE = 10 = 2, 8.

Discussion

4228.	Name an element other than carbon, which exhibits catenationup to 7-8 atoms. Are these compounds stable?
Answer» SOLUTION :SULPHUR and its COMPOUNDS are LESS STABLE.

Discussion

4229.	Name an aqueous salt solution used for testing sulphate radical.
Answer» SOLUTION :BARIUM CHLORIDE `(BaCl_(2))`

Discussion

4230.	Name an alloy of (i) aluminium used in the construction of aircraft. (ii) Lead used in joining metals for electrical work.
Answer» SOLUTION :(i) DURALIUM (II) SOLDER

Discussion

4231.	Name all the elements of group 17.
Answer» SOLUTION :Fluorine (F), chlorine (CI), BROMINE (Br), iodine (I), astatine (At), ununseptium (Uus)

Discussion

4232.	Name (a) three elements that have a single electron in their outermost shells. (b) two elements that have two electrons in their outermost shells. (c) three elements with filled outermost shells.
Answer» SOLUTION :(a) Lithium, sodium and potassium have a single electron in their OUTERMOST shells. (B) Magnesium and calcium have two electrons in their outermost shells. (c) Helium, NEON and ARGON have filled outermost shells.

Discussion

4233.	Name: a) three elements that have a single electron in their outermost shells b) two elements that have two electrons in their outermost shells . c) three elements with filled outermost shells
Answer» SOLUTION :(a) LI, Na, K (b) Be, Mg ( c) He, NE, Ar

Discussion

4234.	Name a technique which is emplyed for the decoration as well as protection of a metallic object .
Answer» SOLUTION :ELECTROPLATING

Discussion

4235.	Name a salt which does not contain water of crystallisation.
Answer» SOLUTION :BAKING SODA

Discussion

4236.	Name a solution in which acetic acid is an essential ingredient .
Answer» SOLUTION :VINEGAR.

Discussion

4237.	Name a solid which can be used instead of concentrated sulphuric acid to prepare ethylene by the dehydration of ethanol.
Answer» SOLUTION :ALUMINA `(Al_2O_3)`

Discussion

4238.	Name a salt which does not contain water of crystallisation
Answer» SOLUTION :SODIUM HYDROGENCARBONATE `(NaHCO_3).`

Discussion

4239.	Name a reagent which can be used to distinguish between ethane and ethene.
Answer» SOLUTION :BROMINE solution

Discussion

4240.	Name a nonmetal which is good conductor of electricity.
Answer» SOLUTION :GRAPHITE (an ALLOTROPE of CARBON)

Discussion

4241.	Name a nonmetal which exists as liquid under normal conditions.
Answer» SOLUTION :BROMINE

Discussion

4242.	Name a nonmetal of very high melting point .
Answer» SOLUTION :DIAMOND

Discussion

4243.	Name a non-metal which is lustrous and a metal which is liquid at the room temperature.
Answer» SOLUTION :IODINE and MERCURY.

Discussion

4244.	Name a non-metal which is lustrous and a metal which is non-lustrous.
Answer» SOLUTION :Non-METAL (lustrous) = IODINE (I) Metal (non-lustrous) = SODIUM (NA)

Discussion

4245.	Name a non-metal which conducts electricity.
Answer» SOLUTION :GRAPHITE

Discussion

4246.	Name a metal which is liquid at room temperature.
Answer» SOLUTION :MERCURY, HG

Discussion

4247.	Name a metal/non-metal : (i) Which makes iron hard and strong ? (ii) Which is alloyed with any other metal to make an amalgam ? (iii) Which is used to galvanise iron articles ? (iv) Whose articles when exposed to air form a black coating ?
Answer» Solution :(i) Carbon (i) MERCURY (iii) ZINC (IV) SILVER

Discussion

4248.	Name a metal from each case: It does not react with cold as well as hot water but reacts with steam. (b) It does not react with any physical state of water. (ii) When calcium metal is added to water the gas evolved does not catch fire but the same gas evolved on adding sodium metal to water catches fire. Why is it so?
Answer» Solution :(a) ALUMINIUM (b) COPPER (II) In both cases, the gas evolved is `H_2`. When calcium reacts with water the heat evolved is not sufficient for hydrogen to catch fire.On the other hand, sodium metal reacts with water VIOLENTLY and in this case a lot of heat is evolved which is sufficient for hydrogen to catch fire.

Discussion

4249.	Name a metal for each case : (i) It displaces hydrogen gas from nitric acid. (ii) It does not react with any physical state of water. (iii) It does not react with cold as well as hot water but reacts with steam.
Answer» SOLUTION :(i) Zinc (ii) Copper (iii) ALUMINIUM.

Discussion

4250.	Name a hydrocarbon which will form a red precipitate with ammoniacal solution of copper (I) chloride.
Answer» SOLUTION :ETHYNE `(C_2H_2)`

Discussion

Explore topic-wise InterviewSolutions in .

Name of the following Distinctive reaction that takes place when ethanol is treated with acetic acid.

Give suitable chemical terms for the following: A reaction in which hydrogen of an alkane is replaced by a halogen.

Name of the following A hydrocarbon which contributes towards the greenhouse effect.

Name of process by which unsaturated fats are changed to saturarted fats.

Name:(i) three elements that have only a single electron in their outermost shells.(ii) two elements that have two electrons in their valence shells.(iii) three elements with completely filled outermost shells.

Name five ways to prevent rusting .

Name four alkaline earth metals and to which group do they belong?

Name different types of chemical reactions, and explain it with suitable example.

Name any two substances which do not contain water of crystallization.

Name any two metals that react with cold water very quickly. Write the products formed when these metals react with cold water.

Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations ? Write the formula of oxide of any of the above said element.

Name any two elements that have two electrons in their valence shell.

Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid element

Name any three substances which fromtrue solutions when dissolved in water.

Name any three common indicators which are usually used in laborations.

Name and state the law which is kept in mind when we balance a chemical equation.

Name and state the law which is kept in mind while we balanced a chemical equation

Name and draw the chain structure and dot structure of first two alkanes.

Name an ore of iron.

Name an ore of aluminium and write its formula.

Name an indicator which tells various levels of H^+ ion concentration.

Name an indicator which can act as self-indicator.

Name an element which has twice as many electrons in its second shell as in the first shell.

Name an element which has a total of two shells and there are three electrons in its valence shell.

Name an element which has a total of three shells and there are four electrons in its valence shell.

Name an element, other than carbon, which exhibits the property of catenation upto seven or eight atoms. Are these compounds stable ?

Name an element that has two shells each one of which is completely filled with electrons.

Name an element other than carbon, which exhibits catenationup to 7-8 atoms. Are these compounds stable?

Name an aqueous salt solution used for testing sulphate radical.

Name an alloy of (i) aluminium used in the construction of aircraft. (ii) Lead used in joining metals for electrical work.

Name all the elements of group 17.

Name (a) three elements that have a single electron in their outermost shells. (b) two elements that have two electrons in their outermost shells. (c) three elements with filled outermost shells.

Name: a) three elements that have a single electron in their outermost shells b) two elements that have two electrons in their outermost shells . c) three elements with filled outermost shells

Name a technique which is emplyed for the decoration as well as protection of a metallic object .

Name a salt which does not contain water of crystallisation.

Name a solution in which acetic acid is an essential ingredient .

Name a solid which can be used instead of concentrated sulphuric acid to prepare ethylene by the dehydration of ethanol.

Name a salt which does not contain water of crystallisation

Name a reagent which can be used to distinguish between ethane and ethene.

Name a nonmetal which is good conductor of electricity.

Name a nonmetal which exists as liquid under normal conditions.

Name a nonmetal of very high melting point .

Name a non-metal which is lustrous and a metal which is liquid at the room temperature.

Name a non-metal which is lustrous and a metal which is non-lustrous.

Name a non-metal which conducts electricity.

Name a metal which is liquid at room temperature.

Name a metal/non-metal : (i) Which makes iron hard and strong ? (ii) Which is alloyed with any other metal to make an amalgam ? (iii) Which is used to galvanise iron articles ? (iv) Whose articles when exposed to air form a black coating ?

Name a metal for each case : (i) It displaces hydrogen gas from nitric acid. (ii) It does not react with any physical state of water. (iii) It does not react with cold as well as hot water but reacts with steam.

Name a hydrocarbon which will form a red precipitate with ammoniacal solution of copper (I) chloride.