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InterviewSolution
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.
| 5101. |
Addition of water to acid is a highly exothermic reaction ... So it the same with the HCL of stomach?.....then what happens to the heat produced? |
| Answer» Addition of water to acid is a highly exothermic reaction ... So it the same with the HCL of stomach?.....then what happens to the heat produced? | |
| 5102. |
does the rate of an exothermic reaction increases with increase in temperature ? if yes then why ? |
| Answer» does the rate of an exothermic reaction increases with increase in temperature ? if yes then why ? | |
| 5103. |
A metal M, forms a volatile chloride containing 65.5% chlorine. If the density of the chloride relative to hydrogen is 162.5, find the molecular formula of the chloride. [M = 56, Cl = 35.5] |
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Answer» A metal M, forms a volatile chloride containing 65.5% chlorine. If the density of the chloride relative to hydrogen is 162.5, find the molecular formula of the chloride. [M = 56, Cl = 35.5] |
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| 5104. |
What is the meaning of isotropy of space? |
| Answer» What is the meaning of isotropy of space? | |
| 5105. |
on analysis it was found that the black oxide of Copper and red oxide of copper contains 80% and 89% of copper respectively show that this data is in accordance with law of multiple proportions |
| Answer» on analysis it was found that the black oxide of Copper and red oxide of copper contains 80% and 89% of copper respectively show that this data is in accordance with law of multiple proportions | |
| 5106. |
is carbon a reactive non-metal or not?? |
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Answer» is carbon a reactive non-metal or not?? |
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| 5107. |
Write the IUPAC name of the given compound. |
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Answer» Write the IUPAC name of the given compound. |
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| 5108. |
WHY HCLO4 is strongest acid in the world and y not other acid / what makes it much acidic all other acids |
| Answer» WHY HCLO4 is strongest acid in the world and y not other acid / what makes it much acidic all other acids | |
| 5109. |
What is the symbol of Gold? |
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Answer» What is the symbol of Gold? |
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| 5110. |
Explain, why the following statement is not correct:Lead chloride can be prepared by adding dilute HCl to lead sulphate solution. |
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Answer» Explain, why the following statement is not correct: |
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| 5111. |
CaO(s) + H2O (l) 🡪 Ca(OH)2 (aq) + HeatWhat can be inferred from the above reaction? |
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Answer» CaO(s) + H2O (l) 🡪 Ca(OH)2 (aq) + Heat What can be inferred from the above reaction? |
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| 5112. |
What is the empirical formula of kaolin the percentage composition is which is as under: Al2O3= 39.5percent ,SiO2 = 46.6 percent, H2O= 13.9 percent |
| Answer» What is the empirical formula of kaolin the percentage composition is which is as under: Al2O3= 39.5percent ,SiO2 = 46.6 percent, H2O= 13.9 percent | |
| 5113. |
If the density of Lake water is 1.25g/ml and contains 92 g of sodium ions per kg of water, calculate molarity in the Lake. |
| Answer» If the density of Lake water is 1.25g/ml and contains 92 g of sodium ions per kg of water, calculate molarity in the Lake. | |
| 5114. |
The crystalline salt Na2SO4.xH20 on heating loses 55.9% of its mass and becomes anhydrous.The formula of crystalline salt is? |
| Answer» The crystalline salt Na2SO4.xH20 on heating loses 55.9% of its mass and becomes anhydrous.The formula of crystalline salt is? | |
| 5115. |
Choose the correct answer from the options given below:(i) Hydroxide of this metal is soluble in sodium hydroxide solution.(a) Magnesium(b) Lead(c) Silver(d) Copper(ii) When dilute sulphuric acid reacts with iron sulphide, the gas evolved is ________.(a) Hydrogen sulphide(b) Sulphur dioxide(c) Sulphur trioxide(d) Vapour of sulphuric acid. |
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Answer» Choose the correct answer from the options given below: (i) Hydroxide of this metal is soluble in sodium hydroxide solution. (a) Magnesium (b) Lead (c) Silver (d) Copper (ii) When dilute sulphuric acid reacts with iron sulphide, the gas evolved is ________. (a) Hydrogen sulphide (b) Sulphur dioxide (c) Sulphur trioxide (d) Vapour of sulphuric acid. |
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| 5116. |
Reaction in which energy is absorbed is known as _____ reaction. |
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Answer» Reaction in which energy is absorbed is known as _____ reaction. |
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| 5117. |
The maximum number of 180^0 angle possible between X-M-X bond for compounds with sp3d2 and sp3d hybridisation respectively are |
| Answer» The maximum number of 180^0 angle possible between X-M-X bond for compounds with sp3d2 and sp3d hybridisation respectively are | |
| 5118. |
Ionic compounds are insoluble in which of the following solvents ? |
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Answer» Ionic compounds are insoluble in which of the following solvents ? |
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| 5119. |
In detection of 'P' by fusing with Na2O2 and then extracting it with water, we add HNO3(conc.) and ammonium molybdate to get1. Yellow ppt of (NH3)PO42. Yellow ppt of (NH4)3PO4.12MoO33. White ppt of (NH4)3PO44. White ppt of (NH4)2HPO3 |
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Answer» In detection of 'P' by fusing with Na2O2 and then extracting it with water, we add HNO3(conc.) and ammonium molybdate to get 1. Yellow ppt of (NH3)PO4 2. Yellow ppt of (NH4)3PO4.12MoO3 3. White ppt of (NH4)3PO4 4. White ppt of (NH4)2HPO3 |
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| 5120. |
Give the general formula of alkanes. |
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Answer» Give the general formula of alkanes. |
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| 5121. |
The isoelectronic pair is |
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Answer» The isoelectronic pair is |
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| 5122. |
The least metallic element among the following is: |
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Answer» The least metallic element among the following is: |
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| 5123. |
(h) Name from the list of the substances given below, the substance which you would use to prepare the salts given below:Copper, Lead, Sodium, Zinc, Copper Oxide, Lead Carbonate, Sodium Carbonate Solution, dil. HCl, dil. HNO3, dil. H2SO4.Salts:(i) Zinc sulphate(ii) Copper sulphate(iii) Sodium sulphate(iv) Lead sulphate |
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Answer» (h) Name from the list of the substances given below, the substance which you would use to prepare the salts given below: |
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| 5124. |
What is the range of magnetic quantum number for a given value of l ? |
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Answer» What is the range of magnetic quantum number for a given value of l ? |
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| 5125. |
C3H4 is the formula of: |
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Answer» C3H4 is the formula of: |
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| 5126. |
(b) Choose the correct answer from the choices (A), (B), (C) and (D):(i) The property which is characteristic of an electrovalent compound is that:(A) it is easily vaporized(B) it has a high melting point(C) it is a weak electrolyte(D) it often exists as a liquid(ii) When a metal atom becomes an ion:(A) it loses electrons and is oxidized(B) it gains electrons and is reduced(C) it gains electrons and is oxidized(D) it loses electrons and is reduced(iii) Which of the following hydroxides is not an alkali?(A) ammonium hydroxide(B) calcium hydroxide(C) copper hydroxide(D) sodium hydroxide |
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Answer» (b) Choose the correct answer from the choices (A), (B), (C) and (D): |
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| 5127. |
how to get the lewis dot structure of SO2 using the formula for (shared electrons)=(total no of electrons) - (valence no of electrons) |
| Answer» how to get the lewis dot structure of SO2 using the formula for (shared electrons)=(total no of electrons) - (valence no of electrons) | |
| 5128. |
How is plaster of paris obtained ? What reaction is involved in the setting of a paste of plaster of paris? What is it used for? [3 MARKS] |
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Answer» How is plaster of paris obtained ? What reaction is involved in the setting of a paste of plaster of paris? What is it used for? [3 MARKS] |
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| 5129. |
When air is blown from the mouth into a test-tube containing limewater, the limewater turned milky due to the presence of: |
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Answer» When air is blown from the mouth into a test-tube containing limewater, the limewater turned milky due to the presence of: |
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| 5130. |
71. The rate of reaction increases by 2.5 times when temperature is raised from 300K to 310K. If K is rate constant at 300K, then the rate constant at 310K will be? |
| Answer» 71. The rate of reaction increases by 2.5 times when temperature is raised from 300K to 310K. If K is rate constant at 300K, then the rate constant at 310K will be? | |
| 5131. |
Calculate the weight of non-volatile solute (in grams) having molecular weight 40 u, which should be dissolved in 57 g octane to reduce its vapour pressure to 80%: |
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Answer» Calculate the weight of non-volatile solute (in grams) having molecular weight 40 u, which should be dissolved in 57 g octane to reduce its vapour pressure to 80%: |
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| 5132. |
Ph-CH(Br)CH2CH3 when treated with MeSNa give Sn2 reaction but when treated with MeSH give Sn1 reaction. Why? |
| Answer» Ph-CH(Br)CH2CH3 when treated with MeSNa give Sn2 reaction but when treated with MeSH give Sn1 reaction. Why? | |
| 5133. |
What is the formula to find entropy of a given substance in terms of number of moles gas constant and log. Also give a list of all the formulas to find the entropy of a given substance. |
| Answer» What is the formula to find entropy of a given substance in terms of number of moles gas constant and log. Also give a list of all the formulas to find the entropy of a given substance. | |
| 5134. |
Choose the non-metallic oxides from the following: |
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Answer» Choose the non-metallic oxides from the following: |
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| 5135. |
Questions 12(c) Give reason why aluminium is a highly reactive metal, yet it is used to make utensils for cooking? |
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Answer» Questions 12(c) |
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| 5136. |
Which of the following would weigh the highest?(a) 0.2 mole of sucrose (C12H22O11)(b) 2 moles of CO2(c) 2 moles of CaCO3(d) 10 moles of H2O |
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Answer» Which of the following would weigh the highest? (a) 0.2 mole of sucrose (C12H22O11) (b) 2 moles of CO2 (c) 2 moles of CaCO3 (d) 10 moles of H2O |
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| 5137. |
HOW MANY GRIGNARD REACTS WITH ALCOHOL TO GIVE N BUTAN |
| Answer» HOW MANY GRIGNARD REACTS WITH ALCOHOL TO GIVE N BUTAN | |
| 5138. |
69) Metals can be prevented from rusting by A\rbrack connecting iron to more electropositive metal cathodic protection b) connecting iron to more electropositive metal anodic protection c) connecting iron to less electropositive metal anodic protection D\rbrack Connecting iron to less electropositive metal cathodic protection |
| Answer» 69) Metals can be prevented from rusting by A\rbrack connecting iron to more electropositive metal cathodic protection b) connecting iron to more electropositive metal anodic protection c) connecting iron to less electropositive metal anodic protection D\rbrack Connecting iron to less electropositive metal cathodic protection | |
| 5139. |
The usual disease caused by the excessive drinking of alcohol over a long period fo time is : (a) diabetes (b) cataract (c) cirrhosis (d) arthritis |
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Answer» The usual disease caused by the excessive drinking of alcohol over a long period fo time is : (a) diabetes (b) cataract (c) cirrhosis (d) arthritis |
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| 5140. |
(a) What is ozone? How is it formed? (b) How does the ozone layer protect us from harmful effects in the environment? (c) What is UNEP? What step has been taken by UNEP in 1987 to prevent too much damage to the ozone layer? |
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Answer» (a) What is ozone? How is it formed? (b) How does the ozone layer protect us from harmful effects in the environment? (c) What is UNEP? What step has been taken by UNEP in 1987 to prevent too much damage to the ozone layer? |
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| 5141. |
Give reason as to why:(i) almost 90% of all known compounds are organic in nature,(ii) it is dangerous to burn methane in an insufficient supply of air. |
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Answer» Give reason as to why: (i) almost 90% of all known compounds are organic in nature, (ii) it is dangerous to burn methane in an insufficient supply of air. |
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| 5142. |
36. Alkanes with even number of carbon atoms have more melting point than its preceding and succeeding all things is it same for boiling point also what order will it follow ?? |
| Answer» 36. Alkanes with even number of carbon atoms have more melting point than its preceding and succeeding all things is it same for boiling point also what order will it follow ?? | |
| 5143. |
Write any four properties of organic compounds that distinguish them from inorganic compounds. [4 MARKS] |
| Answer» Write any four properties of organic compounds that distinguish them from inorganic compounds. [4 MARKS] | |
| 5144. |
What are dobereiners triads? |
| Answer» What are dobereiners triads? | |
| 5145. |
(a) Write down the electronic configuration of (i) sodium atom, and (ii) chlorine atom. (b) How many electrons are there in the outermost shell of (i) a sodium atom, and (ii) a chlorine atom? (c) Show the formation of NaCl from sodium and chlorine atoms by the transfer of electron(s) (d) Why has sodium chloride a high melting point? (e) Name the anode and the cathode used in the electrolytic refining of impure copper metal. |
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Answer» (a) Write down the electronic configuration of (i) sodium atom, and (ii) chlorine atom. |
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| 5146. |
What can a universal indicator indicate?(i) Whether a solution is acidic.(ii) Whether a solution is basic.(iii) The pH of the solution.(iv) Whether a base is strong or weak.(v) Whether an acid is strong or weak. |
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Answer» What can a universal indicator indicate? |
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| 5147. |
What are the conditions for the formation of an electrovalent bond? |
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Answer» What are the conditions for the formation of an electrovalent bond? |
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| 5148. |
choose the correct pairs regarding IE3 : 1)Mn>Cr ,2)Mn>Fe ,3)Zn>Cu ,4)all of the |
| Answer» choose the correct pairs regarding IE3 : 1)Mn>Cr ,2)Mn>Fe ,3)Zn>Cu ,4)all of the | |
| 5149. |
If the density of a unknown gas is 4.5*10–⁴ g/L then determine the vapour density and molecular weight |
| Answer» If the density of a unknown gas is 4.5*10–⁴ g/L then determine the vapour density and molecular weight | |
| 5150. |
why nitrogen can formed only 4 bond pair ? even though it has 5 as its valency ? |
| Answer» why nitrogen can formed only 4 bond pair ? even though it has 5 as its valency ? | |
