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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 2901. |
How long does it take for reactant concentration to decrease from 4×10−4 mol L−1 to 2×10−4 mol L−1 in a zero order reaction. Rate constant of the reaction, k=5×10−8mol L−1 s−1 |
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Answer» How long does it take for reactant concentration to decrease from 4×10−4 mol L−1 to 2×10−4 mol L−1 in a zero order reaction. |
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| 2902. |
36. Which of the following thermodynamic condition at constant pressure and temperature is necessary for the spontaneity of a process? (A)d(E-TS+PC)>0 (B)d(E-TS+PV) |
| Answer» 36. Which of the following thermodynamic condition at constant pressure and temperature is necessary for the spontaneity of a process? (A)d(E-TS+PC)>0 (B)d(E-TS+PV)<0 (C)d(E-TS+PV)=0 (D)d(E+TS+PV)<0 | |
| 2903. |
Question 22The correct electron dot structure of a water molecule is(a) (b) (c) (d) |
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Answer» Question 22 The correct electron dot structure of a water molecule is (a)  (b)  (c)  (d)  |
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| 2904. |
With reference to the reduction of copper(II)oxide, iron(II)oxide, lead(II)oxide and magnesium oxide; place the oxides in order of increasing ease of reduction. [i.e., first write the oxide that is most difficult to reduce and at last, the oxide, that is most easily reduced.] |
| Answer» With reference to the reduction of copper(II)oxide, iron(II)oxide, lead(II)oxide and magnesium oxide; place the oxides in order of increasing ease of reduction. [i.e., first write the oxide that is most difficult to reduce and at last, the oxide, that is most easily reduced.] | |
| 2905. |
Akshit wanted to convert a strong acid into weak acid by diluting. Is it possible? |
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Answer» Akshit wanted to convert a strong acid into weak acid by diluting. Is it possible? |
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| 2906. |
7. why can hybrid orbitals form only sigma bonds but not pi bonds with the surrounding atoms? |
| Answer» 7. why can hybrid orbitals form only sigma bonds but not pi bonds with the surrounding atoms? | |
| 2907. |
Question 32 Identify the functional group present in the following compounds |
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Answer» Question 32 Identify the functional group present in the following compounds 
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| 2908. |
Why are metals malleable , ductile , sonorus , lustrous and why are group 1 metals are soft ? Please explain in detail . |
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Answer» Why are metals malleable , ductile , sonorus , lustrous and why are group 1 metals are soft ? Please explain in detail . |
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| 2909. |
Calculate the ratio of wavelength of first and ultimate line of balmer series of li2+ |
| Answer» Calculate the ratio of wavelength of first and ultimate line of balmer series of li2+ | |
| 2910. |
Why we write chlorine molecule as Cl2 if its valency is 1? |
| Answer» Why we write chlorine molecule as Cl2 if its valency is 1? | |
| 2911. |
If one mole of sodium phosphate is equal to molecular mass of sodium phosphate. Then what us the mass of 0.145 mol of sodium phosphate. (Na = 23 amu, P = 31 amu, O = 16 amu) |
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Answer» If one mole of sodium phosphate is equal to molecular mass of sodium phosphate. Then what us the mass of 0.145 mol of sodium phosphate. (Na = 23 amu, P = 31 amu, O = 16 amu) |
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| 2912. |
Vinay was trying to create sodium acetate, he added ethanoic acid and ‘A’ in an open vessel. He also added few drops of concentrated H2SO4 to this and was surprised when the solution gave a sweet effervescence. So he repeated this experiment in a closed vessel and obtained ethyl acetate. Then he added ‘B’ and created sodium acetate. Find A and B. |
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Answer» Vinay was trying to create sodium acetate, he added ethanoic acid and ‘A’ in an open vessel. He also added few drops of concentrated H2SO4 to this and was surprised when the solution gave a sweet effervescence. So he repeated this experiment in a closed vessel and obtained ethyl acetate. Then he added ‘B’ and created sodium acetate. Find A and B. |
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| 2913. |
Which of the following saturated compounds contains an alcohol group? |
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Answer» Which of the following saturated compounds contains an alcohol group? |
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| 2914. |
Why is it not possible to determine molar conductivity at infinite dilution of weak electrolyte by extrapolation? |
| Answer» Why is it not possible to determine molar conductivity at infinite dilution of weak electrolyte by extrapolation? | |
| 2915. |
Within a group, where would you expect to find the element with:(i) the greatest metallic character?(ii) the largest atomic size? |
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Answer» Within a group, where would you expect to find the element with: (i) the greatest metallic character? (ii) the largest atomic size? |
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| 2916. |
Copper can be drawn into thin wires. Which property is seen here? |
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Answer» Copper can be drawn into thin wires. Which property is seen here?
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| 2917. |
Li has 1 electron in its outer shell, Cl has 7 electrons in its outer shell. Choose the correct option: |
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Answer» Li has 1 electron in its outer shell, Cl has 7 electrons in its outer shell. Choose the correct option: |
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| 2918. |
34. Why does ZnS (r+/r-=0.402)not crystallize in the NaCl structure? |
| Answer» 34. Why does ZnS (r+/r-=0.402)not crystallize in the NaCl structure? | |
| 2919. |
Hydrogen (a moles) and iodine (b moles) react to give 2x moles of the Hl at equilibrium. The total number of moles at equilibrium is |
| Answer» Hydrogen (a moles) and iodine (b moles) react to give 2x moles of the Hl at equilibrium. The total number of moles at equilibrium is | |
| 2920. |
Which is the correct value for the standard potential for a gold-rhodium voltaic cell? The standard half cell potential at 298 K are:Rh3+(aq)+3e−→Rh(s); Eored=0.76 V Au+(aq)+e−→Au(s); Eored=1.69 V |
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Answer» Which is the correct value for the standard potential for a gold-rhodium voltaic cell? |
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| 2921. |
Metallic oxides of zinc, magnesium and copper were heated with the following metals. Metal Zinc Magnesium Copper Zinc oxide Magnesium oxide Copper oxide In which cases will you find displacement reactions taking place? |
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Answer» Metallic oxides of zinc, magnesium and copper were heated with the following metals.
In which cases will you find displacement reactions taking place? |
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| 2922. |
Question 17Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?(a) Na(b) Fe(c) Cr(d) Hg |
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Answer» Question 17 Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature? (a) Na (b) Fe (c) Cr (d) Hg |
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| 2923. |
Give a suitable reason why copper and silver do not give out electrons required for the reduction of hydrogen ions present in acids |
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Answer» Give a suitable reason why copper and silver do not give out electrons required for the reduction of hydrogen ions present in acids |
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| 2924. |
18. How many H2 atom are contained in 1.50g of glucose |
| Answer» 18. How many H2 atom are contained in 1.50g of glucose | |
| 2925. |
(a) Name the substance used for drying ammonia.(b) Write an equation to illustrate the reducing nature of ammonia.(c) With reference to Haber's process for the preparation of ammonia, write the equation and the conditions required. |
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Answer» (a) Name the substance used for drying ammonia. (b) Write an equation to illustrate the reducing nature of ammonia. (c) With reference to Haber's process for the preparation of ammonia, write the equation and the conditions required. |
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| 2926. |
Give limitations of Modern periodic table. |
| Answer» Give limitations of Modern periodic table. | |
| 2927. |
What is the chemical formula of Brine ?What are the products of Electrolysis of Brine ? |
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Answer» What is the chemical formula of Brine ? What are the products of Electrolysis of Brine ? |
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| 2928. |
If an acid is added to milk it's ph will reduce forming curd.But is it possible that if a base is added to curd it can form milk back? |
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Answer» If an acid is added to milk it's ph will reduce forming curd.But is it possible that if a base is added to curd it can form milk back? |
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| 2929. |
The condition in Boyle's law is that the ________ is constant. |
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Answer» The condition in Boyle's law is that the ________ is constant. |
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| 2930. |
37.Among cao and KI which has high melting point and which is soluble in benzene |
| Answer» 37.Among cao and KI which has high melting point and which is soluble in benzene | |
| 2931. |
The van't Hoff (i) for a 0.3 molal aqueous solution of urea is |
| Answer» The van't Hoff (i) for a 0.3 molal aqueous solution of urea is | |
| 2932. |
Question 4 (a)Write the chemical formulae of the following:(a) Magnesium chloride |
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Answer» Question 4 (a) Write the chemical formulae of the following: (a) Magnesium chloride |
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| 2933. |
Which of the following complex's aqueous solution shows maximum conductance? |
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Answer» Which of the following complex's aqueous solution shows maximum conductance? |
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| 2934. |
Balance the following chemical equation : FeSO4→Fe2SO3+SO2+SO3 |
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Answer» Balance the following chemical equation : |
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| 2935. |
70.The density of pure substance 'A' whose atoms are in cubic closed packed arrangement is 1g/cc. Atoms of B are slipped into the tetrahedral voids. Size of atoms 'B' are such that they do not distort the original structure. Find the density of the new substance. (Atomic mass of 'A' is 30 g/mole and atomic mass of 'B' is 10g/mole). |
| Answer» 70.The density of pure substance 'A' whose atoms are in cubic closed packed arrangement is 1g/cc. Atoms of B are slipped into the tetrahedral voids. Size of atoms 'B' are such that they do not distort the original structure. Find the density of the new substance. (Atomic mass of 'A' is 30 g/mole and atomic mass of 'B' is 10g/mole). | |
| 2936. |
A welding fuel gas contains carbon hydrogen only .Burning a small sample of it in oxygen gives 3.38g of carbon dioxide , 0.690g of water and no other products .A volume of 10L of this welding gas found to weigh 11.6 g Calculate 1)emoirical formula 2) molar mass of the gas & molecular formu |
| Answer» A welding fuel gas contains carbon hydrogen only .Burning a small sample of it in oxygen gives 3.38g of carbon dioxide , 0.690g of water and no other products .A volume of 10L of this welding gas found to weigh 11.6 g Calculate 1)emoirical formula 2) molar mass of the gas & molecular formu | |
| 2937. |
19.Molar conductivity of which ion is highest at infinite dilution? 1. H+ 2.OH- 3.Na+ 4.Cl- Give explanation |
| Answer» 19.Molar conductivity of which ion is highest at infinite dilution? 1. H+ 2.OH- 3.Na+ 4.Cl- Give explanation | |
| 2938. |
no. of things on which catalyst depends |
| Answer» no. of things on which catalyst depends | |
| 2939. |
How to complete the chemical equations. CuO + H2SOE4(Sulfuric Acid)------- _________ + ________ |
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Answer» How to complete the chemical equations. CuO + H2SOE4(Sulfuric Acid)------- _________ + ________ |
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| 2940. |
Which of the following statements are usually correct for carbon compounds? They(i) are good conductors of electricity(ii) are poor conductor of electricity(iii) have strong forces of attraction between their molecules(iv) do not have strong forces of attraction between their molecules(a) (i) and (iii)(b) (ii) and (iii)(c) (i) and (iv)(d) (ii) and (iv) |
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Answer» Which of the following statements are usually correct for carbon compounds? They (i) are good conductors of electricity (ii) are poor conductor of electricity (iii) have strong forces of attraction between their molecules (iv) do not have strong forces of attraction between their molecules (a) (i) and (iii) (b) (ii) and (iii) (c) (i) and (iv) (d) (ii) and (iv) |
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| 2941. |
why the melting point of Mn is low thoug h it have max free electron in d orbital |
| Answer» why the melting point of Mn is low thoug h it have max free electron in d orbital | |
| 2942. |
The energy required to convert all the atoms present in 1.2 gram of Mg to Mg^+2. If ionisation enthapy 1 and ionisation enthalpy 2 is 120KJ/mol and 240KJ/mol respectively |
| Answer» The energy required to convert all the atoms present in 1.2 gram of Mg to Mg^+2. If ionisation enthapy 1 and ionisation enthalpy 2 is 120KJ/mol and 240KJ/mol respectively | |
| 2943. |
Identify the products of the following reactions. |
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Answer» Identify the products of the following reactions. |
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| 2944. |
Atomic mass of X and Z are 25 and 45 respectively. If X, Y and Z are Dobereiner's Triad. What will be the atomic mass of Y? |
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Answer» Atomic mass of X and Z are 25 and 45 respectively. If X, Y and Z are Dobereiner's Triad. What will be the atomic mass of Y? |
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| 2945. |
Rain water has a pH of 5.6 due to presence of: |
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Answer» Rain water has a pH of 5.6 due to presence of: |
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| 2946. |
Boiling point also called enthalpy of atomisation true or false |
| Answer» Boiling point also called enthalpy of atomisation true or false | |
| 2947. |
90.Formula of tetraammineaquabromidocobalt(III) nitarte ? |
| Answer» 90.Formula of tetraammineaquabromidocobalt(III) nitarte ? | |
| 2948. |
The bottoms of cooking vessels get blackened when used on gas/kerosene stove due to: |
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Answer» The bottoms of cooking vessels get blackened when used on gas/kerosene stove due to: |
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| 2949. |
The products formed when SO2 reacts with acidified potassium dichromate solution is : |
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Answer» The products formed when SO2 reacts with acidified potassium dichromate solution is : |
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| 2950. |
19. A black mineral A on heating in air gives a gas B. The mineral A on reaction with H2SO4 gives a gas C and a compound D. Bubbling C into an aqueous solution of B gives white turbidity. The aqueous solution of compound D, on exposure to air, with NH4SCN gives a red compound E. The compounds A and E respectively, are: A. PbS and Pb(SCN)2. B. NiS and Ni(SCN)2. C. FeS and Fe(SCN)3. D. CoS and Co(SCN)2. |
| Answer» 19. A black mineral A on heating in air gives a gas B. The mineral A on reaction with H2SO4 gives a gas C and a compound D. Bubbling C into an aqueous solution of B gives white turbidity. The aqueous solution of compound D, on exposure to air, with NH4SCN gives a red compound E. The compounds A and E respectively, are: A. PbS and Pb(SCN)2. B. NiS and Ni(SCN)2. C. FeS and Fe(SCN)3. D. CoS and Co(SCN)2. | |
