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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.
| 3151. |
oxidation state of oxygen in HClO3? oxidation state of oxygen c omes zero but oxygen oxidation state is zero only it is in elemental how here zero come? |
| Answer» oxidation state of oxygen in HClO3? oxidation state of oxygen c omes zero but oxygen oxidation state is zero only it is in elemental how here zero come? | |
| 3152. |
What is the difference between endothermic reaction and endothermic process ? |
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Answer» What is the difference between endothermic reaction and endothermic process ? |
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| 3153. |
If we blow into a glass of lime water, what is the change in color we can expect? |
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Answer» If we blow into a glass of lime water, what is the change in color we can expect? |
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| 3154. |
Why is double displacement reaction also known as precipitation reaction ? |
| Answer» Why is double displacement reaction also known as precipitation reaction ? | |
| 3155. |
Why does an electric light burn even when there is no oxygen in the bulb? |
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Answer» Why does an electric light burn even when there is no oxygen in the bulb? |
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| 3156. |
10. At 25 degree celcious,for the combustion of 1 mole of liquid benzene,the heat of reaction at constant pressure is given by C6H6+15/2O2 gives 6CO2+3H2O (delta H=780980 cal) Calculate the heat of reaction at constant volume |
| Answer» 10. At 25 degree celcious,for the combustion of 1 mole of liquid benzene,the heat of reaction at constant pressure is given by C6H6+15/2O2 gives 6CO2+3H2O (delta H=780980 cal) Calculate the heat of reaction at constant volume | |
| 3157. |
13. Maximum number of mole of oxygen gas that can be obtained by the electrolytic decomposition of 90gms of water . |
| Answer» 13. Maximum number of mole of oxygen gas that can be obtained by the electrolytic decomposition of 90gms of water . | |
| 3158. |
Identify X, Y, and Z based on the following observations. X(Fe)Y(Na)Z(Mg)HardnessHardSoftRelatively softReactivity with waterReacts with steamReacts with cold waterReacts with hot waterReaction with CaCl2No reactionFormation of metal chlorideNo reactionReaction with ZnCl2No reactionFormation of metal chlorideFormation of metal chloride[0.8 mark] |
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Answer» Identify X, Y, and Z based on the following observations.
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| 3159. |
How come coal a biotic resource? |
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Answer» How come coal a biotic resource? |
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| 3160. |
Equivalent weight of ammonium phosphate [(NH4)3PO4] and ammonium chromate[(NH4)2Cr2O7] |
| Answer» Equivalent weight of ammonium phosphate [(NH4)3PO4] and ammonium chromate[(NH4)2Cr2O7] | |
| 3161. |
Which of the following are correct with respect to carbon monoxide?(i) It is released due to incomplete combustion of fuels.(ii) It does not affect humans.(iii) It is a poisonous gas.(iv) It reduces oxygen-carrying capacity of the blood.(v) It is released from vehicles. |
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Answer» Which of the following are correct with respect to carbon monoxide? |
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| 3162. |
The chemical formula for mercuric sulphide is?? |
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Answer» The chemical formula for mercuric sulphide is?? |
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| 3163. |
Which oil is obtained from fish? |
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Answer» Which oil is obtained from fish? |
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| 3164. |
Some natural resources are given in a box. Classify them into the exhaustible and inexhaustible natural resources.Air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen. |
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Answer» Some natural resources are given in a box. Classify them into the exhaustible and inexhaustible natural resources. |
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| 3165. |
How are fertilizer obtained from non -renewable sources like petroleum and coal? |
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Answer» How are fertilizer obtained from non -renewable sources like petroleum and coal? |
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| 3166. |
Question 24Give an example each for the mixture having the following characteristics. Suggest a suitable method to separate the components of these mixtures.(a) A volatile and a non-volatile component.(b) Two volatile components with an appreciable difference in boiling points.(c) Two immiscible liquids.(d) One of the components changes directly from solid to gaseous state.(e) Two or more coloured constituents soluble in some solvent. |
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Answer» Question 24 Give an example each for the mixture having the following characteristics. Suggest a suitable method to separate the components of these mixtures. (a) A volatile and a non-volatile component. (b) Two volatile components with an appreciable difference in boiling points. (c) Two immiscible liquids. (d) One of the components changes directly from solid to gaseous state. (e) Two or more coloured constituents soluble in some solvent. |
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| 3167. |
How will you show that air is necessary for combustion ? |
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Answer» How will you show that air is necessary for combustion ? |
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| 3168. |
'Avoid plastics as far as possible. Comment on this advice. |
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Answer» 'Avoid plastics as far as possible. Comment on this advice. |
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| 3169. |
Which among the following is correctly represented? |
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Answer» Which among the following is correctly represented? |
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| 3170. |
The correct order of the tendency of metals in the activity series to reduce water is:- |
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Answer» The correct order of the tendency of metals in the activity series to reduce water is:- |
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| 3171. |
8. How to distinguish ISO and new compounds? |
| Answer» 8. How to distinguish ISO and new compounds? | |
| 3172. |
42.Select incorrect order 1)LiNO3Ca(OH)2>Sr(OH)2-------Thermal stability 4)Li2SO4 |
| Answer» 42.Select incorrect order 1)LiNO3Ca(OH)2>Sr(OH)2-------Thermal stability 4)Li2SO4 | |
| 3173. |
Answer the following questions.(a) Name the different types of chemical reaction.(b) Explain the difference between a combination and dissociation reaction.(c) Explain with examples what is meant by oxidation.(d) Explain with examples what is meant by reduction.(e) What is a catalyst?(f) On what factors does the speed of chemical reactions depend? |
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Answer» Answer the following questions. (a) Name the different types of chemical reaction. (b) Explain the difference between a combination and dissociation reaction. (c) Explain with examples what is meant by oxidation. (d) Explain with examples what is meant by reduction. (e) What is a catalyst? (f) On what factors does the speed of chemical reactions depend? |
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| 3174. |
Fitting reaction |
| Answer» Fitting reaction | |
| 3175. |
Fill in the blanks to complete the life story of cotton fibre. My parents, cotton plants were grown in soil and climate. The plants bore fruits called . I, the cotton fibre was separated from seeds in the cotton bolls by the process of . Other cotton fibres and myself were made into yarn by the process of . The yarn was to give beautiful colours and then to get cotton fabric. |
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Answer» Fill in the blanks to complete the life story of cotton fibre. My parents, cotton plants were grown in |
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| 3176. |
How can we control global warming? |
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Answer» How can we control global warming? |
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| 3177. |
Reaction A + B → C + D + 38 kcal, has activation energy 20 kcal, Activation energy for reaction C + D → A + B is |
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Answer» Reaction A + B → C + D + 38 kcal, has activation energy 20 kcal, Activation energy for reaction C + D → A + B is |
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| 3178. |
What is the oder of carbon monoxide (CO) |
| Answer» What is the oder of carbon monoxide (CO) | |
| 3179. |
The reddish brown layer of _________ on metal is called as rust. |
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Answer» The reddish brown layer of _________ on metal is called as rust. |
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| 3180. |
When X is added into blue coloured solution of Y. The blue colour of solution disappears and powdery red mass is deposited at the beaker. X and Y respectively are |
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Answer» When X is added into blue coloured solution of Y. The blue colour of solution disappears and powdery red mass is deposited at the beaker. X and Y respectively are |
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| 3181. |
Which of the following option shows the correct characteristics of metals? |
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Answer» Which of the following option shows the correct characteristics of metals? |
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| 3182. |
Why the volume of some solids increase on melting whereas the volume of some solids decrease on melting ? |
| Answer» Why the volume of some solids increase on melting whereas the volume of some solids decrease on melting ? | |
| 3183. |
Question 3 (d) Metals react with acids to produce ___ gas. |
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Answer» Question 3 (d) Metals react with acids to produce |
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| 3184. |
Introducing chlorine to electrolysis 100 watt power at 125 what is being consumed how much protein per minute is liberated |
| Answer» Introducing chlorine to electrolysis 100 watt power at 125 what is being consumed how much protein per minute is liberated | |
| 3185. |
Why is copper sulphate blue in colour ? |
| Answer» Why is copper sulphate blue in colour ? | |
| 3186. |
Which of the following is the most abundant gas in the Earth's atmosphere? |
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Answer» Which of the following is the most abundant gas in the Earth's atmosphere? |
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| 3187. |
A rod of ebonite is rubbed with fur. Compare the magnitudes of charge acquired by them, and state the nature of charges on them. |
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Answer» A rod of ebonite is rubbed with fur. Compare the magnitudes of charge acquired by them, and state the nature of charges on them. |
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| 3188. |
Answer in short ? Lemon pickle should not be stored in aluminium utensils. |
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Answer» Answer in short ? Lemon pickle should not be stored in aluminium utensils. |
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| 3189. |
Which of the following factors influences the rate of chemical reactions? |
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Answer» Which of the following factors influences the rate of chemical reactions? |
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| 3190. |
how to find sigma and pi bond in any organic element EX C4H10 |
| Answer» how to find sigma and pi bond in any organic element EX C4H10 | |
| 3191. |
convert carbon monoxide to formic acid |
| Answer» convert carbon monoxide to formic acid | |
| 3192. |
Matter from which metals can be extracted... |
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Answer» Matter from which metals can be extracted... |
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| 3193. |
Which of the following is an example of exhaustible source of energy? |
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Answer» Which of the following is an example of exhaustible source of energy? |
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| 3194. |
72.compare melting and boiling point of Cr and Fe (both should make 6 bonds . ) |
| Answer» 72.compare melting and boiling point of Cr and Fe (both should make 6 bonds . ) | |
| 3195. |
mass of electron is x times the mass of H atom ,the approx value of x is |
| Answer» mass of electron is x times the mass of H atom ,the approx value of x is | |
| 3196. |
Fill in the blanks.(i) A polymer is a chain of many small units joined together which are called ____.(ii) The synthetic fibres are also known as ____ fibres.(iii) The first fully synthetic fibre was ____.(iv) A fibre similar to wool is ____. |
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Answer» Fill in the blanks. (i) A polymer is a chain of many small units joined together which are called ____. (ii) The synthetic fibres are also known as ____ fibres. (iii) The first fully synthetic fibre was ____. (iv) A fibre similar to wool is ____. |
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| 3197. |
77.Why ionic bond are non directional in nature?? |
| Answer» 77.Why ionic bond are non directional in nature?? | |
| 3198. |
What are skeletal chemical equations |
| Answer» What are skeletal chemical equations | |
| 3199. |
Which of the following compounds are used by farmers to neutralise acidic soil character? |
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Answer» Which of the following compounds are used by farmers to neutralise acidic soil character? |
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| 3200. |
What is the formula of Schiff's base? |
| Answer» What is the formula of Schiff's base? | |