8881 + Interview Questions in Chemistry in Class 10 Page 124 InterviewSolution

6151.	Ethene has the functional group :
Answer» C = C `-C -= C -` `-OH` `-CHO` ANSWER :A

Discussion

6152.	Ethene has :
Answer» 6 COVALENT bonds 7 covalent bonds 8 covalent bonds 5 covalent bonds Answer :A

Discussion

6153.	Ethene burns in air to form CO_2 and ________.
Answer» SOLUTION :WATER `(H_2O)`

Discussion

6154.	Ethene forms an addition product with chlorine. Name this addition product and write its structural formula.
Answer» Solution :DICHLOROETHANE `CL - UNDERSET(H)underset(\|) OVERSET(H) overset(\|) C- underset(H)underset(\|) overset(H) overset(\|) C-Cl`

Discussion

6155.	Ethene decolourises_____ water. (bromine/distilled)
Answer» SOLUTION :BROMINE

Discussion

6156.	Ethene and ethyne are examples of ____.
Answer» SOLUTION :UNSATURATED HYDROCARBONS

Discussion

6157.	Ethanol when warmed with ethanoic acid in the presence of conc,. H_(2)SO_(4) produces a sweet - smelling substance.
Answer» ANSWER :T

Discussion

6158.	Ethanol when heated with Conc. H_(2)SO_(4) at 443K gives…………………..and at 413K gives…………………as products.
Answer» SOLUTION :ETHENE, DIETHYL 1 ETHER

Discussion

6159.	Ethanol reacts with sodium to produce sodium ethanote and hydrogen.
Answer» ANSWER :F

Discussion

6160.	Ethanol reacts with sodium to produce ____ and ____ gas
Answer» SOLUTION :SODIUM ethanote , HYDROGEN

Discussion

6161.	Ethanol reacts with sodium and forms two products. These products are
Answer» Sodium hydroxide and hydrogen gas Sodium ethanoate and ethanoic ACID Sodium ETHOXIDE and hydrogen gas Sodium hydroxide and ethanoic acid ANSWER :C

Discussion

6162.	Ethanol is a clear liquid with burning taste whereas ethanoic acid is a colourless liquid with sour taste.
Answer» ANSWER :1

Discussion

6163.	Ethanol has the functional group :
Answer» `-OH` `-CHO` `-COOH` `-OVERSET(O)overset(\|\|)(C )-` Answer :A

Discussion

6164.	Ethanol can be converted to ethene which can then be changed to ethane.Choose the correct word or phrase from the brackets to complete the following sentences: The catalyst used in the conversion of ethene to ethane is commonly - (iron/ nickel)
Answer» Solution :The catalyst used in the CONVERSION of ethene to ETHANE is COMMONLY nickel.

Discussion

6165.	Ethanol can be converted to ethene which can then be changed to ethane.Choose the correct word or phrase from the brackets to complete the following sentences:The conversion of ethene to ethane is an example of ______ (hydration/ hydrogenation)
Answer» Solution :The CONVERSION of ETHENE to ETHANE is an example of HYDROGENATION.

Discussion

6166.	Ethanol can be converted to ethene which can then be changed to ethane.Choose the correct word or phrase from the brackets to complete the following sentences: Converting ethanol to ethene requires the use of _______(concentrated hydrochloric acid / concentrated nitric acid/concentrated sulphuric acid)
Answer» Solution :CONVERTING ETHANOL to ethene requires the use of concentrated SULPHURIC acid.

Discussion

6167.	Ethanol can be converted to ethene which can then be changed to ethane.Choose the correct word or phrase from the brackets to complete the following sentences: The conversion of ethanol to ethene is an example of ______(dehydration / dehydrogenation)
Answer» Solution :The CONVERSION of ethanol to ETHENE is an EXAMPLE of DEHYDRATION.

Discussion

6168.	Ethanol affects the optic nerve causing blindness.
Answer» Solution :METHANOL affects the OPTIC NERVE CAUSING blindness.

Discussion

6169.	Ethanoicacid turns _________ litmus to _______
Answer» SOLUTION :BLUE , RED

Discussion

6170.	Ethanoic acid turns……………….litmus to…………………
Answer» SOLUTION :BLUE, RED

Discussion

6171.	Ethanoic acid reacts with ethanol in the presence of concentrated H_2 SO_4 , so as to form a compound and water. The chemical reaction which takes place is called _______.(dehydration/hydrogenation/esterification)
Answer» SOLUTION :ESTERIFICATION

Discussion

6172.	Ethanoic acid is an organic compound having industrial values. Give any one use of ethanoic acid.
Answer» ANSWER :* Production of RAYON.In rubber and SILK industry.To PRODUCE Vinegar.

Discussion

6173.	Ethane with the molecular formula C_2H_6 has
Answer» 6 COVALENT bonds 7 covalent bonds 8 covalent bonds 9 covalent bonds Answer :A::B::C::D

Discussion

6174.	Ethane with the molecular formula C_2H_6has
Answer» 6 COVALENT BONDS 7 covalent bonds 8 covalent bonds 9 covalent bonds SOLUTION : 7 covalent bonds .

Discussion

6175.	Ethane, with the molecular formula C_(2)H_(6) has…
Answer» 6 COVALENT BONDS. 7 covalent bonds. 8 covalent bonds. 9 covalent bonds. Solution :7 covalent bonds.

Discussion

6176.	Ethane, with the molecular formula C_(2)H_(6) has:
Answer» 6 covalent BONDS 7 covalent bonds 8 covalent bonds 9 covalent bonds SOLUTION :7 covalent bonds: `H-underset(H)underset(\|)OVERSET(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-H`

Discussion

6177.	Ethane with the molecular formula C_(2)H_(6) has
Answer» 6 COVALENT bonds. 7 covalent bonds. 8 covalent bonds. 9 covalent bonds. Solution :`H-UNDERSET(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-H` There are 7 covalent bonds in the compound.

Discussion

6178.	Ethane, with the molecular formula C_(2)H_(6) has
Answer» 6 covalent bonds. 7 covalent bonds 8 covalent bonds 9 covalent bonds. Solution :Ethane has the structure `H-UNDERSET(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-H All the bonds are covalent. THUS, it has seven covalent bonds. Option (b) is correct.

Discussion

6179.	Ethene undergoes addition reaction.
Answer» Solution :False (ETHANE UNDERGOES SUBSTITUTION reaction)

Discussion

6180.	Ethane is used as fuel. Give one reason.
Answer» SOLUTION :HEAT is PRODUCED when ETHANE BURNS

Discussion

6181.	Ethane, ethene, ethanoic acid, ethyne, ethanol, select the following:The compound with -OH as the part of its structure.
Answer» SOLUTION :ETHANOL

Discussion

6182.	WhyEthene decolourizes Br_2solution but ethane does not
Answer» SOLUTION : FALSE, (ETHENE DECOLOURIZES but ETHANE does not)

Discussion

6183.	Ethane, ethene, ethanoic acid, ethyne, ethanol, select the following:The compound with general formula C_nH_(2n)
Answer» SOLUTION :ETHENE

Discussion

6184.	Ethane, ethene, ethanoic acid, ethyne, ethanol, select the following:The compound with -COOH as the part of its structure.
Answer» SOLUTION :ETHANOIC ACID

Discussion

6185.	Essential component of an amalgam is
Answer» an ALKALI metal MERCURY silver a non-metal SOLUTION :Amalgam is an ALLOY of metal with mercury.

Discussion

6186.	Equlibrium position of which of the following reactions is not affected by change in pressure ?
Answer» `I_(2(s)) + 5F_(2(g)) to 2IF_(5(g))` `FeO_((s)) + CO_((g)) to Fe_((s)) + CO_((g))` `2Cu(NO_(3))_(2(s)) to 2CuO_((s)) + 4NO_(2(g)) + O_(2((g))` `N_(2)O_(4(g)) to 2NO_(2(g))` Answer :B

Discussion

6187.	Equimolar solution of zinc sullphate and ferric sulphate are subjected to electrolysis. What is the ration of Faradays of electricity requried for depositoin of one mole each of zinc and iron ?
Answer» `1 : 2` `2 : 3` `1 : 3` `3 : 2` ANSWER :B

Discussion

6188.	Equilibriumis notattainedin an______ reaction .
Answer» SOLUTION :IRREVERSIBLE

Discussion

6189.	Equilibrium constant has a definite valuefor every reaction at a given temperature . It is independent of_____ and ______.
Answer» ANSWER :CONCENTRATION, PRESSURE

Discussion

6190.	Equilibriumattainedin a chemical reaction is called______.
Answer» SOLUTION :CHEMICAL EQUILIBRIUM

Discussion

6191.	Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained ? (You may use colour guide given in the Exemplar book.)
Answer» a)Red b)Yellow c)YELLOWISH GREEN d)Blue Solution :Yellowish green

Discussion

6192.	Which of the following is TRUE or FALSE Equal volumes of different gases under similar conditions of temperature and pressure contain equal number of molecules.
Answer» ANSWER :T

Discussion

6193.	Equalvolumesof allgases containequalnumberof _________.
Answer» SOLUTION :MOLECULES

Discussion

6194.	Equal volume of all gases under similar conditions of temperature and pressure contain different number of molecules.
Answer» Solution :CORRECT statement: EQUAL VOLUME of all gases under similar conditions of temperature and pressure contain same NUMBER of molecules.

Discussion

6195.	Equal lengths of magnesium ribbons are takn in test tubes A and B Hydrochloric acid is added to test tube A,while acetic acid is added to test tube B .The amount and concentration taken for both the acids are same.In which test tube does the reaction occur more vigorously and why?
Answer» Solution :In test tube ,the reaction occurs more vigorously. Comparing hydrochlorine acid and acetic acud,HCL (hydrochloric aid) is a STRONG acid and more reactive WHEREAS acetic acid is a weak organic acid and less reactive. `Mg+2HCloverset("Fasr reaction")to MgCl_(2)+h_(2)uarr`

Discussion

6196.	Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH_3COOH) is added to test tube B. In which test tube will the fizzing occur more vigorously and why?
Answer» Solution :HCl is a stronger acid than `CH_3COOH`. Therefore, H+ ion concentration in test tube A will be more than that in test tube B. Hence, reaction will take PLACE faster in test tube A than in test tube B. In other WORDS, fizzing will occur more vigorously in test tube B.

Discussion

6197.	Equal lengths of magnesium ribbons are taken in test A and B. Hydrochloric acid (HCl) is added to test tube A while acetic acid (CH_(3)COOH) is added to test tube B. In which test tube, will the fizzing occur more vigorously and why ?
Answer» Solution :We KNOW that hydrochloric acid (HCl) is a strong acid and acetric acid `(CH_(3)COOH)` is WEAK acid. Being a strong acid, HCl solution contains a much greater amount of hydrogen ions in it. Due to this , the fizzing will occur more vigorously in test tube A . The fizzing is due to the evolution of `H_2` GAS which is FORMED by the action of acid on the magnesium ribbon.

Discussion

6198.	Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH_(3)COOH) is added to test tube B. Amount of concentration taken for both acids are same. In which test tubewill the fizzing occur more vigorously and why ?
Answer» Solution :(a) .A. will show vigorous reaction. (b) It is became `H_(2)SO_(4)` is a STRONG acid. (c ) HYDROGEN gas is liberated. Bring a burning splinter NEAR the gas. It will burn with .Pop. Sound. It shows that the gas liberated is hydrogen. (d) `Mg + H_(2)SO_(4) RARR MgSO_(4) + H_(2) uarr`. `Mg + H_(2)CO_(3) rarr MgCO_(3) + H_(2) uarr` (e)`.A. (H_(2)SO_(4))` will have lower pH. .B. `(H_(2)CO_(3))` will have lower concentration of `H^(+)`.

Discussion

6199.	Epsom salt is
Answer» `CuSO_4 , 5H_2 O ` `CaSO_4 . 2H_2 O ` `MgSO_4. 7H_2 O ` `Na_2 SO_4 . 10 H_2 O ` ANSWER :C

Discussion

6200.	Explain the mechanism of the cleaning action of soaps.
Answer» Solution :The dirt present on clothes is organic in nature and insoluble in water.Therefore,it cannot be removed by only WASHING with water.When soap is DISSLOVED in water,its hydrophobic ends attacj themselves in micelles remain SUSPENDED In the water.Hence ,the DUST particles are easily rinsed away by water.

Discussion

Explore topic-wise InterviewSolutions in .

Ethene has the functional group :

Ethene has :

Ethene burns in air to form CO_2 and ________.

Ethene forms an addition product with chlorine. Name this addition product and write its structural formula.

Ethene decolourises_____ water. (bromine/distilled)

Ethene and ethyne are examples of ____.

Ethanol when warmed with ethanoic acid in the presence of conc,. H_(2)SO_(4) produces a sweet - smelling substance.

Ethanol when heated with Conc. H_(2)SO_(4) at 443K gives…………………..and at 413K gives…………………as products.

Ethanol reacts with sodium to produce sodium ethanote and hydrogen.

Ethanol reacts with sodium to produce ____ and ____ gas

Ethanol reacts with sodium and forms two products. These products are

Ethanol is a clear liquid with burning taste whereas ethanoic acid is a colourless liquid with sour taste.

Ethanol has the functional group :

Ethanol can be converted to ethene which can then be changed to ethane.Choose the correct word or phrase from the brackets to complete the following sentences: The catalyst used in the conversion of ethene to ethane is commonly - (iron/ nickel)

Ethanol can be converted to ethene which can then be changed to ethane.Choose the correct word or phrase from the brackets to complete the following sentences:The conversion of ethene to ethane is an example of ______ (hydration/ hydrogenation)

Ethanol can be converted to ethene which can then be changed to ethane.Choose the correct word or phrase from the brackets to complete the following sentences: The conversion of ethanol to ethene is an example of ______(dehydration / dehydrogenation)

Ethanol affects the optic nerve causing blindness.

Ethanoicacid turns _________ litmus to _______

Ethanoic acid turns……………….litmus to…………………

Ethanoic acid reacts with ethanol in the presence of concentrated H_2 SO_4 , so as to form a compound and water. The chemical reaction which takes place is called _______.(dehydration/hydrogenation/esterification)

Ethanoic acid is an organic compound having industrial values. Give any one use of ethanoic acid.

Ethane with the molecular formula C_2H_6 has

Ethane with the molecular formula C_2H_6has

Ethane, with the molecular formula C_(2)H_(6) has…

Ethane, with the molecular formula C_(2)H_(6) has:

Ethane with the molecular formula C_(2)H_(6) has

Ethane, with the molecular formula C_(2)H_(6) has

Ethene undergoes addition reaction.

Ethane is used as fuel. Give one reason.

Ethane, ethene, ethanoic acid, ethyne, ethanol, select the following:The compound with -OH as the part of its structure.

WhyEthene decolourizes Br_2solution but ethane does not

Ethane, ethene, ethanoic acid, ethyne, ethanol, select the following:The compound with general formula C_nH_(2n)

Ethane, ethene, ethanoic acid, ethyne, ethanol, select the following:The compound with -COOH as the part of its structure.

Essential component of an amalgam is

Equlibrium position of which of the following reactions is not affected by change in pressure ?

Equimolar solution of zinc sullphate and ferric sulphate are subjected to electrolysis. What is the ration of Faradays of electricity requried for depositoin of one mole each of zinc and iron ?

Equilibriumis notattainedin an______ reaction .

Equilibrium constant has a definite valuefor every reaction at a given temperature . It is independent of_____ and ______.

Equilibriumattainedin a chemical reaction is called______.

Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained ? (You may use colour guide given in the Exemplar book.)

Which of the following is TRUE or FALSE Equal volumes of different gases under similar conditions of temperature and pressure contain equal number of molecules.

Equalvolumesof allgases containequalnumberof _________.

Equal volume of all gases under similar conditions of temperature and pressure contain different number of molecules.

Equal lengths of magnesium ribbons are takn in test tubes A and B Hydrochloric acid is added to test tube A,while acetic acid is added to test tube B .The amount and concentration taken for both the acids are same.In which test tube does the reaction occur more vigorously and why?

Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH_3COOH) is added to test tube B. In which test tube will the fizzing occur more vigorously and why?

Equal lengths of magnesium ribbons are taken in test A and B. Hydrochloric acid (HCl) is added to test tube A while acetic acid (CH_(3)COOH) is added to test tube B. In which test tube, will the fizzing occur more vigorously and why ?

Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH_(3)COOH) is added to test tube B. Amount of concentration taken for both acids are same. In which test tubewill the fizzing occur more vigorously and why ?

Epsom salt is

Explain the mechanism of the cleaning action of soaps.

Ethanol reacts with sodium to produce and gas

Ethanoicacid turns ___ litmus to _

Equilibrium constant has a definite valuefor every reaction at a given temperature . It is independent of_ and __.