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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.
| 2001. |
What type of chemical bond is formed between: (a) potassium and bromine? (b) carbon and bromine? |
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Answer» What type of chemical bond is formed between: |
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| 2002. |
Name the acid present in ant sting. |
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Answer» Name the acid present in ant sting. |
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| 2003. |
During which metal extraction process we use Cryolite? |
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Answer» During which metal extraction process we use Cryolite? |
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| 2004. |
when we can say that equatorial bond is greater than axial bond and vice versa. what are the conditions |
| Answer» when we can say that equatorial bond is greater than axial bond and vice versa. what are the conditions | |
| 2005. |
The process of respiration is : (a) an oxidation reaction which is endothermic (b) a reduction reaction which is exothermic (c) a combination reaction which is endothermic (d) an oxidation reaction which is exothermic |
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Answer» The process of respiration is : (a) an oxidation reaction which is endothermic (b) a reduction reaction which is exothermic (c) a combination reaction which is endothermic (d) an oxidation reaction which is exothermic |
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| 2006. |
Standard reduction electrode potentials of three metals A,B and C are +0.5V,−3.0V & −1.2V respectively.The decreasing order of reducing powers of these metals is: |
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Answer» Standard reduction electrode potentials of three metals A,B and C are +0.5V,−3.0V & −1.2V respectively. |
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| 2007. |
Question 1What will be the electron dot structure of carbon dioxide which has the formula CO2? |
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Answer» Question 1 What will be the electron dot structure of carbon dioxide which has the formula CO2? |
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| 2008. |
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:(i) The conversion of ethanol to ethene is an example of ........... (dehydration, dehydrogenation).(ii) Converting ethanol to ethene requires the use of ......... (concentrated hydrochloric acid, concentrated nitric acid, concentrated sulphuric acid).(iii) The conversion of ethene to ethane is an example of ......... (hydration, hydrogenation).(iv) The catalyst used in the conversion of ethene to ethane is commonly ............ (iron, cobalt, nickel). |
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Answer» 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: (i) The conversion of ethanol to ethene is an example of ........... (dehydration, dehydrogenation). (ii) Converting ethanol to ethene requires the use of ......... (concentrated hydrochloric acid, concentrated nitric acid, concentrated sulphuric acid). (iii) The conversion of ethene to ethane is an example of ......... (hydration, hydrogenation). (iv) The catalyst used in the conversion of ethene to ethane is commonly ............ (iron, cobalt, nickel). |
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| 2009. |
35.which metal ion is likely to form a square planar Complex Ion with CN - Cu+ Ag+ Ni+2 Zn+2 |
| Answer» 35.which metal ion is likely to form a square planar Complex Ion with CN - Cu+ Ag+ Ni+2 Zn+2 | |
| 2010. |
If set A has p elements and set B has q elements, number of elements in set (A × B) is _____. |
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Answer» If set A has p elements and set B has q elements, number of elements in set (A × B) is _____. |
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| 2011. |
11. Does d sigma p sigma bond exist? |
| Answer» 11. Does d sigma p sigma bond exist? | |
| 2012. |
7. What is the normality of 10% (weight/volume) acetic acid |
| Answer» 7. What is the normality of 10% (weight/volume) acetic acid | |
| 2013. |
How will you show that acetic acid is monobasic acid? |
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Answer» How will you show that acetic acid is monobasic acid? |
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| 2014. |
Acids are either mineral or organic–what is the difference between the two? |
| Answer» Acids are either mineral or organic–what is the difference between the two? | |
| 2015. |
What are organic and inorganic substances? |
| Answer» What are organic and inorganic substances? | |
| 2016. |
Which of the following compounds is an allylic alcohol? |
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Answer» Which of the following compounds is an allylic alcohol? |
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| 2017. |
Question 8Mass of one atom of oxygen is(a) 166.023×1023g(b) 326.023×1023g(c) 16.023×1023g(d) 8u |
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Answer» Question 8 Mass of one atom of oxygen is (a) 166.023×1023g (b) 326.023×1023g (c) 16.023×1023g (d) 8u |
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| 2018. |
75. The electron gain enthalpy of cl is 3.7ev How much energy in k Cal is released when 10g of cl is completely converted to cl- ion in a gaseous state? |
| Answer» 75. The electron gain enthalpy of cl is 3.7ev How much energy in k Cal is released when 10g of cl is completely converted to cl- ion in a gaseous state? | |
| 2019. |
how size of H+ ion responsible for no existence of H+ as free ion |
| Answer» how size of H+ ion responsible for no existence of H+ as free ion | |
| 2020. |
Why is sulphuric acid known as king of chemicals and oil of vitriol? |
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Answer» Why is sulphuric acid known as king of chemicals and oil of vitriol? |
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| 2021. |
2 chlorobu†an e reaction with potassium tert butoxid |
| Answer» 2 chlorobu†an e reaction with potassium tert butoxid | |
| 2022. |
find the number of geometrical isomers including enantiomers of \lbrack M(en){(ox)}_2\rbrack. |
| Answer» find the number of geometrical isomers including enantiomers of \lbrack M(en){(ox)}_2\rbrack. | |
| 2023. |
Select the acid responsible for the sour taste in oranges and lemons. |
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Answer» Select the acid responsible for the sour taste in oranges and lemons.
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| 2024. |
on centigrade scale the temperatre increase by 30 degrees. the increas in temperatur in fahrenheit i |
| Answer» on centigrade scale the temperatre increase by 30 degrees. the increas in temperatur in fahrenheit i | |
| 2025. |
Which of the following is the strongest Lewis acid?BF3BI3BBr3BI3 |
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Answer» Which of the following is the strongest Lewis acid? BF3 BI3 BBr3 BI3 |
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| 2026. |
The number of shells in the elements of 3rd period of the modern periodic table is- |
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Answer» The number of shells in the elements of 3rd period of the modern periodic table is- |
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| 2027. |
Ionic bond is not present in which of the following compounds? |
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Answer» Ionic bond is not present in which of the following compounds? |
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| 2028. |
In which of the allotropes of carbon, every carbon atoms is bonded to three other carbon atoms. |
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Answer» In which of the allotropes of carbon, every carbon atoms is bonded to three other carbon atoms. |
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| 2029. |
Δ Hf C2H4 = 12.5 kCal Heat of atomisation of C = 171 kCal Bond energy of H2 = 104.3 kCal Bond energy of C – H = 99.3 kCal What is the value of C = C bond enegyis |
| Answer» Δ Hf C2H4 = 12.5 kCal Heat of atomisation of C = 171 kCal Bond energy of H2 = 104.3 kCal Bond energy of C – H = 99.3 kCal What is the value of C = C bond enegyis | |
| 2030. |
slope of the graph between Z and P for real gas depends on (a)pressure (b)nature of gas (c)temperature (d)all of these |
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Answer» slope of the graph between Z and P for real gas depends on (a)pressure (b)nature of gas (c)temperature (d)all of these |
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| 2031. |
The nodal plane in the π-bond of ethene is located in: |
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Answer» The nodal plane in the π-bond of ethene is located in: |
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| 2032. |
Match the zones of blast furnace used in refining of iron with the respective reaction happening in them. |
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Answer» Match the zones of blast furnace used in refining of iron with the respective reaction happening in them. |
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| 2033. |
The solubilities of Na2SO4,BeSO4,MgSO4 and BaSO4 will follow the order |
| Answer» The solubilities of Na2SO4,BeSO4,MgSO4 and BaSO4 will follow the order | |
| 2034. |
Which of the following statements is true |
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Answer» Which of the following statements is true |
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| 2035. |
A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dilute H2S04 but gives no precipitate with sodium chloride or iodide,The white precipitate obtained when sodium carbonate is added to metal salt solution salt will consists of is(a) Lead carbonate(b) Basic lead carbonate(c) Barium carbonate(d) Strontium carbonate. Why it can not be strontium carbonate |
| Answer» A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dilute H2S04 but gives no precipitate with sodium chloride or iodide,The white precipitate obtained when sodium carbonate is added to metal salt solution salt will consists of is(a) Lead carbonate(b) Basic lead carbonate(c) Barium carbonate(d) Strontium carbonate. Why it can not be strontium carbonate | |
| 2036. |
Question 26. Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed on the pH paper. What would be the colour obtained? (You may use colour guide given in figure of NCERT Book (Science Class X) on page 26). (a) Red (b) Yellow (c) Yellowish green (d) Blue |
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Answer» Question 26. Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed on the pH paper. What would be the colour obtained? (You may use colour guide given in figure of NCERT Book (Science Class X) on page 26).  (a) Red (b) Yellow (c) Yellowish green (d) Blue |
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| 2037. |
What is the trend of the atomic radii of the given elements which belong to the second period? |
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Answer» What is the trend of the atomic radii of the given elements which belong to the second period? |
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| 2038. |
What is surd? |
| Answer» What is surd? | |
| 2039. |
What do you see when concentrated nitric acid is added to copper? |
| Answer» What do you see when concentrated nitric acid is added to copper? | |
| 2040. |
What happens when dilute hydrochloric acid is added to iron fillings |
| Answer» What happens when dilute hydrochloric acid is added to iron fillings | |
| 2041. |
In the Haber's process, Nitrogen and Hydrogen react to form Ammonia. Which factor increases both the speed of reaction and the amount of Ammonia produced? |
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Answer» In the Haber's process, Nitrogen and Hydrogen react to form Ammonia. Which factor increases both the speed of reaction and the amount of Ammonia produced? |
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| 2042. |
The elements in the Dobereiner’s triads follow: |
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Answer» The elements in the Dobereiner’s triads follow: |
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| 2043. |
If temperature is increased. what will be the effect on henrey's cons†an t and solubility of any gas? |
| Answer» If temperature is increased. what will be the effect on henrey's cons†an t and solubility of any gas? | |
| 2044. |
Define hybridisation. |
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Answer» Define hybridisation. |
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| 2045. |
Define electrochemical reactions. |
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Answer» Define electrochemical reactions. |
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| 2046. |
39 Which of the following is true for nitrate anion (1) formal charge on N is 0 (2) bond order of NO bond is 4/3 (3) average formal charge on oxygen is -1/3 (4) there are 2 pi bonds in the ion Which one is correct option Also explain ? |
| Answer» 39 Which of the following is true for nitrate anion (1) formal charge on N is 0 (2) bond order of NO bond is 4/3 (3) average formal charge on oxygen is -1/3 (4) there are 2 pi bonds in the ion Which one is correct option Also explain ? | |
| 2047. |
(i) phosphorus burns in presence of chlorine to form phosphorus pentachloride. |
| Answer» (i) phosphorus burns in presence of chlorine to form phosphorus pentachloride. | |
| 2048. |
The diagram shows an apparatus used to compare rates of diffusion. At which labelled position did a white deposit of Ammonium Chloride form? |
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Answer» The diagram shows an apparatus used to compare rates of diffusion. At which labelled position did a white deposit of Ammonium Chloride form? |
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| 2049. |
what is chemical reaction ? |
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Answer» what is chemical reaction ? |
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| 2050. |
43.A nucleus X of mass no. 220 at rest decays emitting an alpha particle.If energy of daughter nuclei is o.2Mev,Q value of the reaction is? |
| Answer» 43.A nucleus X of mass no. 220 at rest decays emitting an alpha particle.If energy of daughter nuclei is o.2Mev,Q value of the reaction is? | |
