8881 + Interview Questions in Chemistry in Class 10 Page 59 InterviewSolution

2901.	The ionicproductof watercan beexpressedas ______.
Answer» SOLUTION :`K_(W)==[H^(+)][OH^-]`

Discussion

2902.	The ionic end of the Soap molecule is :
Answer» Hydrophobic Hydrophilic Hydrophobic or Hydrophilic None of these Answer :B

Discussion

2903.	The ion which is dischargedat the anode during the electrolysis of copper sulphatesolutionusingplatinum electrode as anode and cathode [Cu^(2+) OH^(-),SO_(4)^(2-) H^(+)]
Answer» SOLUTION :`OH^(-)`

Discussion

2904.	The ion formed by dissolution of H^(+) inwater is called…..
Answer» SOLUTION :HYDRONIUM ION

Discussion

2905.	The international standards of weight and measures are made of
Answer» gold SILVER alloys platinum-iridium alloys COPPER - gold alloys platinum - IRON alloys Answer :B

Discussion

2906.	The internal energy of the system increases when the following reaction is carried out : A+B to C State whether the reaction is exothermic and endothermic.
Answer» SOLUTION :EXOTHERMIC.

Discussion

2907.	The Interconversion of matter can be achieved in the following way
Answer» By CHANGING the Temperature By changing the Pressure Both A and B None Answer :C

Discussion

2908.	The insoluble product obtained when a solution of barium chloride is added to a solution of sodium sulphate is
Answer» BARIUM sulphate barium sulphite SODIUM NITRATE sodium chloride ANSWER :A

Discussion

2909.	The inner-transition elements belong to ________ block of the periodic table and are shown separately at the ________ of the periodic table.
Answer» ANSWER :F -, BOTTOM

Discussion

2910.	The inner surface of solar cooker is coated with black paint to:
Answer» absorb more HEAT reflect light prevent rusting CONVERGE the light rays. Solution :The INNER surface of solar COOKER is coated with black paint : (A) To absorb more heat

Discussion

2911.	The indicator that shows colour changes in the entire pH range is
Answer» phenolphthalein methyl orange universal indicator thymol blue Answer :C

Discussion

2912.	The incorrect statement related to thyroxine hormone among the following is :
Answer» it regulates fat metabolism its DEFICIENCY leads to goitre it is secreted by parathyroid gland iodine in the food is ESSENTIAL for its production. Solution :The incorrect STATEMENT related to thyroxine hormone AMONG the following is : (C) it is secreted by parathyroid gland.

Discussion

2913.	The incorrect statement about phosphorus is
Answer» Phosphorus is STORED in water Phosphorus is soluble in CARBON DISULPHIDE Phosphorus REACTS with OXYGEN to form acidic oxides Phosphorus oxides are gases Answer :D

Discussion

2914.	The____in the rateofreactionindicatesthe increase in the concentration .
Answer» SOLUTION :POSITIVE SIGN

Discussion

2915.	The impurities present in the ore are named as :
Answer» Ore Slag Gangue Flux Answer :C

Discussion

2916.	The ideapH for blood is ……….and pH of the mouth falls below …….
Answer» SOLUTION :7.35-7.45, SULPHURIC ACID

Discussion

2917.	The hydroxyl ion concentration of a solution is 1xx10^(-9) M.What is the pOH of the solution?
Answer» Solution :POH=`-lg_(10)[OH^(-)]` pOH=`-log_(10)[1xx10^(-9)]` pOH=`(log_(10)1.0+log_(10)10^(-9))` pOH=-(0-9) pOH=9

Discussion

2918.	The hydroxide ion concentration of a solution is 1.0xx10^(-9)m. What is the pH of the solution?
Answer» Solution :POH=`-log_(10)[OH^(-)]` pOH =`-log_(10)(1XX10^(-9))` pOH=9 pH+pOH=14 pH=14-pOH pH=14-9 pH=5

Discussion

2919.	The hydrophilic end of synthetic detergent is
Answer» `CH_(3)(CH_(3))_(10)-CH_(2)-` `-CH_(3)` `SO_(3)-NA^(+)` `-COO^(-)Na^(+)` Answer :C

Discussion

2920.	The hydroxide ion concentration of a solution is 0.001 m.What is the pH of the solution ?
Answer» SOLUTION :pOH=`-log_(10)[OH^(-)]` pOH=`-log_(10)(1XX10^(-3))` `pH+pOH=14 pH+14-pOH `therefore` pH =14-3=11`implies`pH=11

Discussion

2921.	The hydroide ion concentration of a solution is 1xx10^(-11)M. What is the pH of the solution?
Answer» SOLUTION :`[H^(+)][OH^(-)]=10^(-14)` `[H^(+)]xx1xx10^(-11)=10^(-14)` `[H^(+)]=10^(-3)` `pH=-log[H^(+)]=-log[10^(-3)]=3`

Discussion

2922.	The hydrogen ion concentration of a solution is 1xx10^(-4)m. Calculate the pH and pOH and pOH of that solution .
Answer» Solution :`[H^(+)]=1xx10^(-4)M` PH=`-log_(10)[H^(+)]` `pH+-log_(10)[1xx10^(-4)]` pH=4 pH+pOH=14 `THEREFORE` pOH=14-pH 14-4=10 pH=4,pOH=10

Discussion

2923.	The hydrogen ion concentration of a solution is 1.0xx10^(-9) m.What is the pH of the solution ?Find out whether the given solution is acidic .basic or neutral .
Answer» Solution :PH=`-log_(10)[H^(+)]` pH+`-log_(10)(1.0xx10^(-9))` pH=log 1-`log 1xx10^(-9)` =0.0000-9.0000 pH=9 pH `GT` 7,so the solution is basic.

Discussion

2924.	The hydrogen ion concentration of a liquid is equal to its hydroxide ion concentration . The liquid is
Answer» ACIDIC . ALKALINE rainwater a NEUTRAL SOLUTION ANSWER :D

Discussion

2925.	The hydrocarbons involving carbon to carbon triple bonds are called ___(alkenes/alkynes)
Answer» SOLUTION :ALKYNES

Discussion

2926.	The hydrocarbons involving only single bonds are called____. (alkenes, alkanes)
Answer» SOLUTION :ALKANES

Discussion

2927.	The hydrocarbons involving carbon to carbon double bonds are called_____. (alkenes/alkanes)
Answer» SOLUTION :ALKENE

Discussion

2928.	The hydrocarbons containing carbon to carbon triple bond are called……………..
Answer» Alkane Alkyne PARAFFIN ALKENE ANSWER :B

Discussion

2929.	The hydrocarbons containing only single bonds are known as______.
Answer» SOLUTION :ALKANES (SATURATED HYDROCARBONS)

Discussion

2930.	The hydrocarbons containing atleast one carbon to carbon double bond are called……………….
Answer» paraffins alkyne alkene alkane Answer :C

Discussion

2931.	The hydrocarbon that burns with a clean flame is
Answer» `C_4H_10` `C_3H_6` `C_4H_8` `C_5H_10` ANSWER :A

Discussion

2932.	The hydrocarbon 2 -methylpropane is an isomer of
Answer» n-butane ISOBUTANE n-propane PENTANE ANSWER :B

Discussion

2933.	The highest ionization energy is exhibited by ……………………. .
Answer» HALOGENS ALKALINE earth metals Transition metal NOBEL gases ANSWER :D

Discussion

2934.	The heteroatoms present in CH_(3)-CH_(2)-O-CH_(2)-CH_(2)Cl are (i) oxygen (ii) carbon (iii) hydrogen (iv) chlorine
Answer» (i) and (II) (ii) and (iii) (iii) and (iv) (i) and (iv) Solution :OXYGEN and chlorine are HETEROATOMS in the compound.

Discussion

2935.	The heat of combustion of yellow phosphorous is -9.91 KJ and the red phosphorous is -8.78 KJ. The heat of transition of yellow phosphorous to red phosphorous is:
Answer» `-9.91 KJ` `-8.78 kJ` `-9.34 kJ` `-1.13kJ` ANSWER :D

Discussion

2936.	The heat energy exchanged between the system and surroundings at constant temperature and pressure is known as…..
Answer» ANSWER :ENTHALPY

Discussion

2937.	The hardest substancein the human body is ……………
Answer» BONE ENAMEL COATING of teeth Brain liver Answer :A::C

Discussion

2938.	The growth of tendrils in pea plants is due to
Answer» RAPID cell DIVISIONS in the tendril in the region AWAY from support Rapid cell DIVISION in the tendril in the region of CONTACT to the support. The effect of light The effect of gravity Solution :Rapid cell divisions in the tendril in the region away from support

Discussion

2939.	The group with valency zero .
Answer» SOLUTION :GROUP 18

Discussion

2940.	The group of compounds that will dissociate partially in aqueous solution is
Answer» Hydrochloric ACID, NITRIC acid Carbonic acid,Phosphoric acid Hydrochloric acid, phosphoric acid Copper sulphate SOLUTION, SUGAR solution Solution :Carbonic acid, Phosphoric acid

Discussion

2941.	The group of compounds which are in homologous series is,
Answer» `CH_4 , C_2H_4, C_2H_2` `CH_4, CH_3OH , HCHO` `CH_4, C_2H_6, C_3H_8` `C_2H_2 , C_3H_6, C_4H_10` SOLUTION :`CH_4, C_2H_6, C_3H_8`

Discussion

2942.	The greater the criticaltemperature of a gas, the easier is the liquefaction of the gas.
Answer» ANSWER :1

Discussion

2943.	The gram molecular mass of water is ………………… .
Answer» 18 amu 18 g 18 U 18 Solution :18 u

Discussion

2944.	The gram molecular mass of oxygen molecules is …………. .
Answer» 16g 18g 32g 17g Solution :Hint : By DEFINITION the GRAM MOLECULAR MASS of oxygen molecule `O_(2)` is 32 G.

Discussion

2945.	The grammolecularmass ofCO_(2)is
Answer» 16 G 18g 44 g 17 g Answer :C

Discussion

2946.	The gram atomic mass of an element has no unit
Answer» Solution :False. Correct STATEMENT: The GRAM atomic MASS of an element is expressed in the UNIT grams.

Discussion

2947.	The glass used to make lenses and prisms is……………..
Answer» ANSWER :OPTIC GLASS

Discussion

2948.	The given reaction is CH_(3)COOH + C_(2)H_(5)OH overset("Conc." H_(2)SO_(4),Delta)hArr CH_(3)COOC_(2)H_(5) + H_(2)O is called :
Answer» Esterification Saponification Hydrolysis Oxidation Answer :A

Discussion

2949.	The given reaction NaOH + HC1 to NaC1 + H_(2)O is na example of
Answer» NEUTRALISATION reaction double DISPLACEMENT reaction exothermic reaction all of these Answer :D

Discussion

2950.	The given equations represents the reaction of Copper Sulphate with an element X. CuSO_(4) + X rarr Cu + Y Which element is represented by X, among Fe and Ag ? Justify your answer. Write the molecular formula of the compound represented by Y.
Answer» SOLUTION :Fe The REACTIVITY of Fe is more than Cu. `FeSO_(4)`

Discussion

Explore topic-wise InterviewSolutions in .

The ionicproductof watercan beexpressedas ______.

The ionic end of the Soap molecule is :

The ion which is dischargedat the anode during the electrolysis of copper sulphatesolutionusingplatinum electrode as anode and cathode [Cu^(2+) OH^(-),SO_(4)^(2-) H^(+)]

The ion formed by dissolution of H^(+) inwater is called…..

The international standards of weight and measures are made of

The internal energy of the system increases when the following reaction is carried out : A+B to C State whether the reaction is exothermic and endothermic.

The Interconversion of matter can be achieved in the following way

The insoluble product obtained when a solution of barium chloride is added to a solution of sodium sulphate is

The inner-transition elements belong to ________ block of the periodic table and are shown separately at the ________ of the periodic table.

The inner surface of solar cooker is coated with black paint to:

The indicator that shows colour changes in the entire pH range is

The incorrect statement related to thyroxine hormone among the following is :

The incorrect statement about phosphorus is

The____in the rateofreactionindicatesthe increase in the concentration .

The impurities present in the ore are named as :

The ideapH for blood is ……….and pH of the mouth falls below …….

The hydroxyl ion concentration of a solution is 1xx10^(-9) M.What is the pOH of the solution?

The hydroxide ion concentration of a solution is 1.0xx10^(-9)m. What is the pH of the solution?

The hydrophilic end of synthetic detergent is

The hydroxide ion concentration of a solution is 0.001 m.What is the pH of the solution ?

The hydroide ion concentration of a solution is 1xx10^(-11)M. What is the pH of the solution?

The hydrogen ion concentration of a solution is 1xx10^(-4)m. Calculate the pH and pOH and pOH of that solution .

The hydrogen ion concentration of a solution is 1.0xx10^(-9) m.What is the pH of the solution ?Find out whether the given solution is acidic .basic or neutral .

The hydrogen ion concentration of a liquid is equal to its hydroxide ion concentration . The liquid is

The hydrocarbons involving carbon to carbon triple bonds are called ___(alkenes/alkynes)

The hydrocarbons involving only single bonds are called____. (alkenes, alkanes)

The hydrocarbons involving carbon to carbon double bonds are called_____. (alkenes/alkanes)

The hydrocarbons containing carbon to carbon triple bond are called……………..

The hydrocarbons containing only single bonds are known as______.

The hydrocarbons containing atleast one carbon to carbon double bond are called……………….

The hydrocarbon that burns with a clean flame is

The hydrocarbon 2 -methylpropane is an isomer of

The highest ionization energy is exhibited by ……………………. .

The heteroatoms present in CH_(3)-CH_(2)-O-CH_(2)-CH_(2)Cl are (i) oxygen (ii) carbon (iii) hydrogen (iv) chlorine

The heat of combustion of yellow phosphorous is -9.91 KJ and the red phosphorous is -8.78 KJ. The heat of transition of yellow phosphorous to red phosphorous is:

The heat energy exchanged between the system and surroundings at constant temperature and pressure is known as…..

The hardest substancein the human body is ……………

The growth of tendrils in pea plants is due to

The group with valency zero .

The group of compounds that will dissociate partially in aqueous solution is

The group of compounds which are in homologous series is,

The greater the criticaltemperature of a gas, the easier is the liquefaction of the gas.

The gram molecular mass of water is ………………… .

The gram molecular mass of oxygen molecules is …………. .

The grammolecularmass ofCO_(2)is

The gram atomic mass of an element has no unit

The glass used to make lenses and prisms is……………..

The given reaction is CH_(3)COOH + C_(2)H_(5)OH overset("Conc." H_(2)SO_(4),Delta)hArr CH_(3)COOC_(2)H_(5) + H_(2)O is called :

The given reaction NaOH + HC1 to NaC1 + H_(2)O is na example of

The given equations represents the reaction of Copper Sulphate with an element X. CuSO_(4) + X rarr Cu + Y Which element is represented by X, among Fe and Ag ? Justify your answer. Write the molecular formula of the compound represented by Y.

The inner-transition elements belong to block of the periodic table and are shown separately at the of the periodic table.