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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.
| 3051. |
what is using tollen's reageant? |
| Answer» what is using tollen's reageant? | |
| 3052. |
Metals react with oxygen in air to form _________. |
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Answer» Metals react with oxygen in air to form _________. |
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| 3053. |
The equation for the burning of octane is:2C8H18 + 25O2 → 16CO2 + 18H2O(i) How many moles of carbon dioxide are produced when one mole of octane burns?(ii) What volume, at STP, is occupied by the number of moles determined in (i)?(iii) If the relative molecular mass of carbon dioxide is 44, what is the mass of carbon dioxide produced by burning two moles of octane?(iv) What is the empirical formula of octane? |
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Answer» The equation for the burning of octane is: |
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| 3054. |
Choose the statement that is true for ethanoic acid. |
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Answer» Choose the statement that is true for ethanoic acid. |
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| 3055. |
what are the total electrons , valance electrons, shared electrons and unshared electrons in compound SOCl3?? |
| Answer» what are the total electrons , valance electrons, shared electrons and unshared electrons in compound SOCl3?? | |
| 3056. |
An ionic compound has a unit cell consisting of A ions at the corners of a cube, B ions on the centres of the faces of the cube but one axis of faces are missing,empirical formula for this compound would be (a) AB2 (b) A3B (c) AB (d) A2B |
| Answer» An ionic compound has a unit cell consisting of A ions at the corners of a cube, B ions on the centres of the faces of the cube but one axis of faces are missing,empirical formula for this compound would be (a) AB2 (b) A3B (c) AB (d) A2B | |
| 3057. |
Metal bells work on the property called ______. |
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Answer» Metal bells work on the property called ______. |
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| 3058. |
Name the covalent compound which behaves like an ionic compound in aqueous solution. |
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Answer» Name the covalent compound which behaves like an ionic compound in aqueous solution. |
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| 3059. |
What is meant by a group in the periodic table? |
| Answer» What is meant by a group in the periodic table? | |
| 3060. |
Find the value of z in the following reaction1/2cl2__x__clo-_y____clo2- ________z_________ |
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Answer» Find the value of z in the following reaction 1/2cl2__x__clo-_y____clo2- ________z_________ |
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| 3061. |
physical property of alcoho |
| Answer» physical property of alcoho | |
| 3062. |
24. What is equivalent mass of kclo3 in 3 kclo3+3 H2SO4= 3KHSO4+hclo3+2clo2+h2o |
| Answer» 24. What is equivalent mass of kclo3 in 3 kclo3+3 H2SO4= 3KHSO4+hclo3+2clo2+h2o | |
| 3063. |
32.Why graphite conduct electricity but diamond doesn't while both are made up of carbon ? |
| Answer» 32.Why graphite conduct electricity but diamond doesn't while both are made up of carbon ? | |
| 3064. |
A welding fuel contains carbon and hydrogen only. Burning a small sample of it in oxygen gives 3.38g carbon dioxide, 0.690g of water and no other products. A volume of 10.0L (measured at STP) of this welding gas is found to weigh 11.6g. Calculate(i)empirical formula (ii)molar mass of the gas(iii)molecular formula |
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Answer» A welding fuel contains carbon and hydrogen only. Burning a small sample of it in oxygen gives 3.38g carbon dioxide, 0.690g of water and no other products. A volume of 10.0L (measured at STP) of this welding gas is found to weigh 11.6g. Calculate (i)empirical formula (ii)molar mass of the gas (iii)molecular formula |
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| 3065. |
Which can displace Al from Alum :-(1) Mn(2) TI(3) Sc(4) In |
| Answer» Which can displace Al from Alum :-(1) Mn(2) TI(3) Sc(4) In | |
| 3066. |
Four miles of a compound X weigh 176g . Find X. |
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Answer» Four miles of a compound X weigh 176g . Find X. |
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| 3067. |
Does light have a magnetic field around it? Or does it have an electric field around it? How can we measure the strength of either of the two? Or what is the strength of the field ,? Or it does not posses any? |
| Answer» Does light have a magnetic field around it? Or does it have an electric field around it? How can we measure the strength of either of the two? Or what is the strength of the field ,? Or it does not posses any? | |
| 3068. |
(i) Explain the following in terms of gain or loss of oxygen:(a) Oxidation(b) Reduction(ii) In the reaction:3MnO2+4Al→3Mn+2Al2O3(a) Name the substance oxidised(b) Name the substance reduced(c) Name the oxidizing agent(d) Name the reducing agent |
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Answer» (i) Explain the following in terms of gain or loss of oxygen: (a) Oxidation (b) Reduction (ii) In the reaction: 3MnO2+4Al→3Mn+2Al2O3 (a) Name the substance oxidised (b) Name the substance reduced (c) Name the oxidizing agent (d) Name the reducing agent |
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| 3069. |
10. Which of the following statements is incorrect?(a) One gram atom of carbon contains Avogadro'snumber of atoms.(b) One mole of oxygen gas contains Avogadro'snumber of molecules.One mole of hydrogen contains Avogadro'snumber of atoms.(d) One mole of electrons stands for 6.02 10electrons.11. The total number of electrons present in 18 mL ofwater (density of water is 1 g mL) is(a) 6.021023(c) 6.02x1024(b) 6.02x 1022(d) 6.02x 1025A metal oxide has the formula M2O3. It can be reducedby H, to give free metal and water. 0.1596 g of M20required 6 mg of H2 for complete reduction. Theatomic mass of the metal is(a) 27.9(b) 79.8 (c) 55.8(d) 159.8 |
| Answer» 10. Which of the following statements is incorrect?(a) One gram atom of carbon contains Avogadro'snumber of atoms.(b) One mole of oxygen gas contains Avogadro'snumber of molecules.One mole of hydrogen contains Avogadro'snumber of atoms.(d) One mole of electrons stands for 6.02 10electrons.11. The total number of electrons present in 18 mL ofwater (density of water is 1 g mL) is(a) 6.021023(c) 6.02x1024(b) 6.02x 1022(d) 6.02x 1025A metal oxide has the formula M2O3. It can be reducedby H, to give free metal and water. 0.1596 g of M20required 6 mg of H2 for complete reduction. Theatomic mass of the metal is(a) 27.9(b) 79.8 (c) 55.8(d) 159.8 | |
| 3070. |
Which of the following ion will move at the anode when molten lead bromide is used as an electrolyte? |
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Answer» Which of the following ion will move at the anode when molten lead bromide is used as an electrolyte? |
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| 3071. |
Which of these substances are arranged in their correct order of conductivity of heat? |
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Answer» Which of these substances are arranged in their correct order of conductivity of heat? |
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| 3072. |
Name: [5 MARKS] (a) a nitrate of metal which on heating does not give nitrogen dioxide. (b) a nitrate which on heating leaves no residue behind. (c) a metal nitrate which on heating is changed into metal oxide. (d) a metal nitrate which on heating is changed into metal. (e) a solution which absorbs nitric oxide. |
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Answer» Name: [5 MARKS] (a) a nitrate of metal which on heating does not give nitrogen dioxide. (b) a nitrate which on heating leaves no residue behind. (c) a metal nitrate which on heating is changed into metal oxide. (d) a metal nitrate which on heating is changed into metal. (e) a solution which absorbs nitric oxide. |
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| 3073. |
23. How many unoccupied orbital are present for an atom with electronic configuration of 1S2,2S2,2P6,3S2,3P3 |
| Answer» 23. How many unoccupied orbital are present for an atom with electronic configuration of 1S2,2S2,2P6,3S2,3P3 | |
| 3074. |
a mixture of Ar and N2 have molecular mass 31.38g/mol at STP. density of mixture is |
| Answer» a mixture of Ar and N2 have molecular mass 31.38g/mol at STP. density of mixture is | |
| 3075. |
Taking sodium carbonate as an example, give the meaning of the following terms:(i) water of crystallisation(ii) anhydrous |
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Answer» Taking sodium carbonate as an example, give the meaning of the following terms: (i) water of crystallisation (ii) anhydrous |
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| 3076. |
Sucrose is converted to a mixture of glucose and fructose in a pseudo first order process under alkaline conditions. The reaction has half life of 28.4 min. The time period (in min) upto one decimal, required for the reduction of a 8.0 mM sample of sucrose to 1.0 mM is (Given: log8=0.903) |
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Answer» Sucrose is converted to a mixture of glucose and fructose in a pseudo first order process under alkaline conditions. The reaction has half life of 28.4 min. The time period (in min) upto one decimal, required for the reduction of a 8.0 mM sample of sucrose to 1.0 mM is (Given: log8=0.903) |
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| 3077. |
The IP1, IP2, IP3, IP4, IP5 of an element are 7.1, 14.3, 34.5, 46.8, 162.2 eV respectively. Which element among the following would that be? |
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Answer» The IP1, IP2, IP3, IP4, IP5 of an element are 7.1, 14.3, 34.5, 46.8, 162.2 eV respectively. Which element among the following would that be? |
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| 3078. |
Green chemistry means:- |
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Answer» Green chemistry means:- |
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| 3079. |
What is the chemical formula of aluminium chloride? |
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Answer» What is the chemical formula of aluminium chloride? |
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| 3080. |
39. Which one of the following nitro compound does not react with nitrous acid?1nitro propane , 2methy 1nitro propane, 1,1dimetyl1nitro ethane, 1methyl 2oxo 1nitro propane |
| Answer» 39. Which one of the following nitro compound does not react with nitrous acid?1nitro propane , 2methy 1nitro propane, 1,1dimetyl1nitro ethane, 1methyl 2oxo 1nitro propane | |
| 3081. |
The reaction in which atoms combine with unsaturated carbon compounds to form saturated carbon compounds is known as |
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Answer» The reaction in which atoms combine with unsaturated carbon compounds to form saturated carbon compounds is known as |
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| 3082. |
Is it possible for an electron to get shared by 2 or more than 2 atoms? |
| Answer» Is it possible for an electron to get shared by 2 or more than 2 atoms? | |
| 3083. |
___ clay is a naturally occurring thermally setting substance. |
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Answer» |
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| 3084. |
A mixture of CaCl2 and NaCl weighing 3.70g is treated with Na2CO3 solution to precipitate all the Ca2+ ions as CaCO3. the CaCO3 so obtained is heated strongly to get 0.84 g of CaO. The percentage of NaCl in the mixture is |
| Answer» A mixture of CaCl2 and NaCl weighing 3.70g is treated with Na2CO3 solution to precipitate all the Ca2+ ions as CaCO3. the CaCO3 so obtained is heated strongly to get 0.84 g of CaO. The percentage of NaCl in the mixture is | |
| 3085. |
Why the iodination of alkane is endothermic but chlorination and bromination are exothermic ? |
| Answer» Why the iodination of alkane is endothermic but chlorination and bromination are exothermic ? | |
| 3086. |
Which of the following devices is not used to measure length? |
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Answer» Which of the following devices is not used to measure length? |
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| 3087. |
Write a balanced chemical equation when Phosphorus burns with oxygen to form phophorus pentoxide |
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Answer» Write a balanced chemical equation when Phosphorus burns with oxygen to form phophorus pentoxide |
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| 3088. |
State what is observed when excess of ammonia is passed through an aqueous solution of lead nitrate? |
| Answer» State what is observed when excess of ammonia is passed through an aqueous solution of lead nitrate? | |
| 3089. |
The bond formed by a shared pair of electrons, with each bonding atom contributing one electron to the pair, is known as: |
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Answer» The bond formed by a shared pair of electrons, with each bonding atom contributing one electron to the pair, is known as: |
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| 3090. |
From the following Balance Sheet of Tiger Super Steel Ltd, prepare a cash flow statement. Balance Sheet Capital and Liabilities2010 (Rs.)2011 (Rs.)Assets2010(Rs.)2011(Rs)Equity Share Capital80,0001,20,000Goodwill24,00018,80010% Preference Share Capital40,00020,000Land and Building40,00020,000General Reserve8,00012,000Plant36,00076,400Profit and Loss Account7,20010,800Investment4,00014,000Proposed Dividend11,20015,600Debtors30,00043,200Bills Payable14,00021,200Stock34,00031,200Outstanding Expenses3,2002,400Cash6,80011,200Provision for Taxation11,20012,800¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯1,74,800––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯2,14,800––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯1,74,800––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯2,14,800–––––––––– Additional Information: Depreciation charged on land and building Rs. 20,000 and plant Rs. 10,000 during the year. |
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Answer» From the following Balance Sheet of Tiger Super Steel Ltd, prepare a cash flow statement. Balance Sheet Capital and Liabilities2010 (Rs.)2011 (Rs.)Assets2010(Rs.)2011(Rs)Equity Share Capital80,0001,20,000Goodwill24,00018,80010% Preference Share Capital40,00020,000Land and Building40,00020,000General Reserve8,00012,000Plant36,00076,400Profit and Loss Account7,20010,800Investment4,00014,000Proposed Dividend11,20015,600Debtors30,00043,200Bills Payable14,00021,200Stock34,00031,200Outstanding Expenses3,2002,400Cash6,80011,200Provision for Taxation11,20012,800¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯1,74,800––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯2,14,800––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯1,74,800––––––––––¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯2,14,800–––––––––– Additional Information: Depreciation charged on land and building Rs. 20,000 and plant Rs. 10,000 during the year. |
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| 3091. |
The most abundant metal in the earth's crust is___. |
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Answer» The most abundant metal in the earth's crust is___. |
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| 3092. |
2Cu+ =Cu + Cu++ in the reactio how many electron are exchanged per Cu+ ion |
| Answer» 2Cu+ =Cu + Cu++ in the reactio how many electron are exchanged per Cu+ ion | |
| 3093. |
Balance the following equations by the oxidation number method. (i) Fe2+ + H+ + Cr2O7 2– → Cr3+ + Fe3+ + H2O (ii) MnO2 + C2O4 2– → Mn2+ + CO2 |
| Answer» Balance the following equations by the oxidation number method. (i) Fe2+ + H+ + Cr2O7 2– → Cr3+ + Fe3+ + H2O (ii) MnO2 + C2O4 2– → Mn2+ + CO2 | |
| 3094. |
which of the following has maximum bond angle around oxygen? (1)CH3-O-CH3 (2)CH3CH2-O-CH2CH3 (3)C6H5-O-C6H5 (4)same in all |
| Answer» which of the following has maximum bond angle around oxygen? (1)CH3-O-CH3 (2)CH3CH2-O-CH2CH3 (3)C6H5-O-C6H5 (4)same in all | |
| 3095. |
Find out number of moles in 1 kg proton |
| Answer» Find out number of moles in 1 kg proton | |
| 3096. |
What is a covalent bond? How H2 molecules are formed? |
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Answer» What is a covalent bond? How H2 molecules are formed? |
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| 3097. |
Why is the valency of iron is 2 and 3 ..? |
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Answer» Why is the valency of iron is 2 and 3 ..? |
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| 3098. |
The product formed in the following reaction will be:2KHCO3+H2SO4→ |
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Answer» The product formed in the following reaction will be: 2KHCO3+H2SO4→ |
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| 3099. |
Are Minerals,Metals? |
| Answer» Are Minerals,Metals? | |
| 3100. |
An open flask contains air at 27∘ C. To what temperature it must be heated to expel one-fourth of the volume? |
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Answer» An open flask contains air at 27∘ C. To what temperature it must be heated to expel one-fourth of the volume? |
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