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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.
| 2051. |
Fill in the blanks(1) The organic compounds having double or triple bond in them are termed as _______(2) The general formula of alkanes is _______(3) _______ are known as parent organic compounds.(4) Covalent compounds are generally soluble in _______ solvents.(5) Triple bond can be obtained by sharing _______ pairs or _______ electrons.(6) Hydrocarbons necessarily contain _______ and _______. |
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Answer» Fill in the blanks (1) The organic compounds having double or triple bond in them are termed as _______ (2) The general formula of alkanes is _______ (3) _______ are known as parent organic compounds. (4) Covalent compounds are generally soluble in _______ solvents. (5) Triple bond can be obtained by sharing _______ pairs or _______ electrons. (6) Hydrocarbons necessarily contain _______ and _______.
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| 2052. |
One dayReeta went to a jeweller’s shop with her mother. Her mothergave an old gold jewellery to the goldsmith to polish. Next day whenthey brought the jewellery back, they found that there was a slightloss in its weight. Can you suggest a reason for the loss in weight? |
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Answer» One day |
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| 2053. |
A catalyst lowers the activation energy of the forward reaction by 20 kJ/ mol. It also changes the activation energy of the backward reaction by an amount: |
| Answer» A catalyst lowers the activation energy of the forward reaction by 20 kJ/ mol. It also changes the activation energy of the backward reaction by an amount: | |
| 2054. |
Calculate the molarity of sulphuric acid solution in which mole fraction of water is 0.85. |
| Answer» Calculate the molarity of sulphuric acid solution in which mole fraction of water is 0.85. | |
| 2055. |
Decomposition of vegetable matter, is an example of |
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Answer» Decomposition of vegetable matter, is an example of |
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| 2056. |
While sulphur dioxide and hydrogen peroxide can actas oxidising as well as reducing agents in theirreactions, ozone and nitric acid act only as oxidants.This is because(a) in SO2 and H2O2, S and O are in their lowest oxidationstate(b) in 03 and HNO3, N and O are in their highest oxidationstateOs and HNO3, N and O are in their lowest oxidationstate(o) in(d) Both (a) and (b) |
| Answer» While sulphur dioxide and hydrogen peroxide can actas oxidising as well as reducing agents in theirreactions, ozone and nitric acid act only as oxidants.This is because(a) in SO2 and H2O2, S and O are in their lowest oxidationstate(b) in 03 and HNO3, N and O are in their highest oxidationstateOs and HNO3, N and O are in their lowest oxidationstate(o) in(d) Both (a) and (b) | |
| 2057. |
a U nucleasc originally at rest decays by emitting an alpha particle say with a velocity of v mper se |
| Answer» a U nucleasc originally at rest decays by emitting an alpha particle say with a velocity of v mper se | |
| 2058. |
For the reaction, X2O4(l)→2XO2(g)△ U =2.1 k cal, △ S= 20 cal K-1 at 300 K Hence, G is |
| Answer» For the reaction, X2O4(l)→2XO2(g)△ U =2.1 k cal, △ S= 20 cal K-1 at 300 K Hence, G is | |
| 2059. |
How many shared electrons result in a single Covalent Bond? |
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Answer» How many shared electrons result in a single Covalent Bond? |
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| 2060. |
Which feature of ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water? |
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Answer» Which feature of ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water? |
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| 2061. |
Which of the following has highest boiling point ? |
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Answer» Which of the following has highest boiling point ? |
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| 2062. |
Sodium reacts with cold water to form: |
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Answer» Sodium reacts with cold water to form: |
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| 2063. |
Fill in the blanks:(i) There are ________ groups and ________ periods in the modern form of periodic table.(ii) Most electropositive elements belong to _________ group.(iii) Most electronegative elements belong to ________ group.(iv) Energy released when electron is added to a neutral gaseous atom is called ________.(v) Size of the atoms ________ from left to right across a period and _________ on descending in a group of normal elements.(vi) The maximum electronegativity is shown by _________.(vii) Noble gases have __________ electron affinity. |
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Answer» Fill in the blanks: (i) There are ________ groups and ________ periods in the modern form of periodic table. (ii) Most electropositive elements belong to _________ group. (iii) Most electronegative elements belong to ________ group. (iv) Energy released when electron is added to a neutral gaseous atom is called ________. (v) Size of the atoms ________ from left to right across a period and _________ on descending in a group of normal elements. (vi) The maximum electronegativity is shown by _________. (vii) Noble gases have __________ electron affinity. |
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| 2064. |
how to calculate abnormal mass |
| Answer» how to calculate abnormal mass | |
| 2065. |
The terms sewage, sewers and sewerage are interlinked with each other. Can you explain, how? |
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Answer» The terms sewage, sewers and sewerage are interlinked with each other. Can you explain, how? |
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| 2066. |
Why is the electron affinity of fluorine is less than chlorine? |
| Answer» Why is the electron affinity of fluorine is less than chlorine? | |
| 2067. |
the angular speed of an electron orbiting the hydrogen nucleus is proportional to1/r 1/r^3/2 1/r^2 r^3/2 |
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Answer» the angular speed of an electron orbiting the hydrogen nucleus is proportional to 1/r 1/r^3/2 1/r^2 r^3/2 |
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| 2068. |
Which of the following compounds has the below structure ? |
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Answer» Which of the following compounds has the below structure ? |
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| 2069. |
What happens when Calcium hydroxide is heated? |
| Answer» What happens when Calcium hydroxide is heated? | |
| 2070. |
Explain how 1 vol of nitrogen combines with 3 vol of hydrogen to give 2 vol of ammonia. |
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Answer» Explain how 1 vol of nitrogen combines with 3 vol of hydrogen to give 2 vol of ammonia. |
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| 2071. |
Arrange the following in ascending order of their atomicity. Oxygen, Sulphuric acid and Ammonium Chloride |
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Answer» Arrange the following in ascending order of their atomicity. Oxygen, Sulphuric acid and Ammonium Chloride |
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| 2072. |
What is the correct chemical equation for the combustion of charcoal (carbon) in the presence of oxygen? |
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Answer» What is the correct chemical equation for the combustion of charcoal (carbon) in the presence of oxygen? |
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| 2073. |
Which among the following statement(s) is/are true?Exposure of silver of silver chloride to sunlight for a long duration turns grey due to:(1) Formation of silver by decomposition of silver chloride.(2) Sublimation of silver chloride(3) Decomposition of chlorine gas from silver chloride(4) Oxidation of silver chloride |
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Answer» Which among the following statement(s) is/are true? |
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| 2074. |
Sushma has to prepare a biryani, before that she has to remove dust particles from the rice. Which of the following can be done? |
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Answer» Sushma has to prepare a biryani, before that she has to remove dust particles from the rice. Which of the following can be done? |
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| 2075. |
How can i identify that a given compound is a salt or not ? |
| Answer» How can i identify that a given compound is a salt or not ? | |
| 2076. |
What is the need for classification of elements? |
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Answer» What is the need for classification of elements? |
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| 2077. |
for a half cell of type cl- (C) \vert AgCl\vert Ag, its half cell potential is equal to the half cell potential of Ag+( Ksp/\lbrack Cl-\rbrack)\vert Ag but the E^° of the two half cells are not same.Explain it |
| Answer» for a half cell of type cl- (C) \vert AgCl\vert Ag, its half cell potential is equal to the half cell potential of Ag+( Ksp/\lbrack Cl-\rbrack)\vert Ag but the E^° of the two half cells are not same.Explain it | |
| 2078. |
Conduction of electricity in liquids occurs through electrons. Do you agree? Give reasons. |
| Answer» Conduction of electricity in liquids occurs through electrons. Do you agree? Give reasons. | |
| 2079. |
The temperature for an equilibrum reaction is increased from 10K to 298K .If Kp doubles the change in enthalpy is |
| Answer» The temperature for an equilibrum reaction is increased from 10K to 298K .If Kp doubles the change in enthalpy is | |
| 2080. |
Two rectangular boxes have the same height and length, but different widths as shown in the figure.The difference in the volume of the boxes is 360 cm3. Find the height of the box. |
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Answer» Two rectangular boxes have the same height and length, but different widths as shown in the figure. |
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| 2081. |
Question 34.Name the acid present in ant sting and give its chemical formula. Also give the common method to get relief from the discomfort caused by the ant sting. |
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Answer» Question 34. Name the acid present in ant sting and give its chemical formula. Also give the common method to get relief from the discomfort caused by the ant sting. |
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| 2082. |
ntIf A occupies half of tetrahedral voids B occupies tetrahedral as well as octahedral voids in equal amount Oxide ion forms CCP find formula A ABO B AB2O4 C A2BO4 D AB3O4n |
| Answer» ntIf A occupies half of tetrahedral voids B occupies tetrahedral as well as octahedral voids in equal amount Oxide ion forms CCP find formula A ABO B AB2O4 C A2BO4 D AB3O4n | |
| 2083. |
Why NO acts as a three electron donor? |
| Answer» Why NO acts as a three electron donor? | |
| 2084. |
Is redox reaction exothermic or endothermic reaction? |
| Answer» Is redox reaction exothermic or endothermic reaction? | |
| 2085. |
Choose the correct chemical equation for the reaction of magnesium metal with hydrochloric acid. |
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Answer» Choose the correct chemical equation for the reaction of magnesium metal with hydrochloric acid. |
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| 2086. |
what is the mass of carbon dioxide which contain the same number of molecules as are contained in 40g of oxyge |
| Answer» what is the mass of carbon dioxide which contain the same number of molecules as are contained in 40g of oxyge | |
| 2087. |
Equal volumes of H2 and CO2 are filled in a chamber at room temperature. Which of the following is correct w.r.t. their partial pressures of h2 and co2?a ph2=pco2b. p h2 > pco2c. p h2< p co2d.none of the above |
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Answer» Equal volumes of H2 and CO2 are filled in a chamber at room temperature. Which of the following is correct w.r.t. their partial pressures of h2 and co2? a ph2=pco2 b. p h2 > pco2 c. p h2< p co2 d.none of the above |
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| 2088. |
Which of the following properties make metals the best choice to be used in electroplating? |
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Answer» Which of the following properties make metals the best choice to be used in electroplating? |
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| 2089. |
number of carbon atoms present linearly in vinyl acetylene? |
| Answer» number of carbon atoms present linearly in vinyl acetylene? | |
| 2090. |
is oxygen molecule is an odd electron species |
| Answer» is oxygen molecule is an odd electron species | |
| 2091. |
the number of isomers represented by the molecular formula C4 H10 O is |
| Answer» the number of isomers represented by the molecular formula C4 H10 O is | |
| 2092. |
(a) What is buckminsterfullerene? How is it related to diamond and graphite? (b) Why is diamond used for making cutting tools (like glass cutters) but graphite is not? (c) Why is graphite used for making dry cell electrodes but diamond is not? |
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Answer» (a) What is buckminsterfullerene? How is it related to diamond and graphite? |
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| 2093. |
What is the mass of 10 moles of H2O? ___ |
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Answer» What is the mass of 10 moles of H2O? |
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| 2094. |
Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as(a) Na (b) Mg (c) Al (d) Si |
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Answer» Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as (a) Na (b) Mg (c) Al (d) Si |
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| 2095. |
12. Can Gram formula mass unit can only be calculated for ionic compound? |
| Answer» 12. Can Gram formula mass unit can only be calculated for ionic compound? | |
| 2096. |
Mass of one atom of X is 6.66 ×10 raise to -23 gram .Hence number of moles of atom X in 40 gra |
| Answer» Mass of one atom of X is 6.66 ×10 raise to -23 gram .Hence number of moles of atom X in 40 gra | |
| 2097. |
How to find molar concentration on dilution |
| Answer» How to find molar concentration on dilution | |
| 2098. |
Give reasons why noble gases were discovered very late |
| Answer» Give reasons why noble gases were discovered very late | |
| 2099. |
What is catenation? Why carbon show maximum tendency of catenation? |
| Answer» What is catenation? Why carbon show maximum tendency of catenation? | |
| 2100. |
What is subshells? |
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Answer» What is subshells? |
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