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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.
| 2551. |
What is aqua regia? State the uses of aqua regia. |
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Answer» What is aqua regia? State the uses of aqua regia. |
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| 2552. |
Activation energy |
| Answer» Activation energy | |
| 2553. |
The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid:(i) Name A (a liquid), B (a solid) and C (a liquid).(ii) Write the balanced chemical equation to show how nitric acid undergoes decomposition.(iii) Write the balanced chemical equation for the reaction in which copper is oxidised by concentrated nitric acid. |
Answer» The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid: (i) Name A (a liquid), B (a solid) and C (a liquid). (ii) Write the balanced chemical equation to show how nitric acid undergoes decomposition. (iii) Write the balanced chemical equation for the reaction in which copper is oxidised by concentrated nitric acid. |
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| 2554. |
Which two of the following compounds belong to same homologous series? C2H6O2,C2H6O,C2H6,CH4O |
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Answer» Which two of the following compounds belong to same homologous series? C2H6O2,C2H6O,C2H6,CH4O |
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| 2555. |
0.1 M HX (weak acid) is taken in a containerat equilibrium pH of solution is 4. Select thecorrect statement if temperature of reaction is25^° C(1) Dissociation constant of acid is 10(2) Dissociation constant of acid is 10-3Degree of dissociation of acid is 10-3(4) Degree of dissociation of acid is 10-5 |
| Answer» 0.1 M HX (weak acid) is taken in a containerat equilibrium pH of solution is 4. Select thecorrect statement if temperature of reaction is25^° C(1) Dissociation constant of acid is 10(2) Dissociation constant of acid is 10-3Degree of dissociation of acid is 10-3(4) Degree of dissociation of acid is 10-5 | |
| 2556. |
Which non metal has a shining surface? |
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Answer» Which non metal has a shining surface? |
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| 2557. |
Butyric acid contains only C,H,O. A 4.24mg sample of butyric acid is completely burnt. It gives 8.45mg of CO2 and 3.46mg of H2O. What is the mass percentage of each element in butyric acid? The molecular mass of butyric acid was determined by experiment to be 88 a.m.u. What is the molecular formula? Please help me solve this question briefly!!! |
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Answer» Butyric acid contains only C,H,O. A 4.24mg sample of butyric acid is completely burnt. It gives 8.45mg of CO2 and 3.46mg of H2O. What is the mass percentage of each element in butyric acid? The molecular mass of butyric acid was determined by experiment to be 88 a.m.u. What is the molecular formula? Please help me solve this question briefly!!! |
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| 2558. |
Write the IUPAC names of the following : (i) CH3COCH3 (b) CH3COCH2CH3 |
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Answer» Write the IUPAC names of the following : |
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| 2559. |
What is the oxidation state of carboxylic carbon in peroxy benzoic acid ? |
| Answer» What is the oxidation state of carboxylic carbon in peroxy benzoic acid ? | |
| 2560. |
What happens when zinc nitrate is strongly heated? |
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Answer» What happens when zinc nitrate is strongly heated? |
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| 2561. |
Ques. in a compound A containing carbon , hydrogen and oxygen , the % of hydrogen is one sixth that of carbon which is 1.5 times that of oxygen . what is the simplest formula of the compound (a)C_2H_4O_2 (b)C_2H_4O (c)C_2H_6O (d)CH_4O |
| Answer» Ques. in a compound A containing carbon , hydrogen and oxygen , the % of hydrogen is one sixth that of carbon which is 1.5 times that of oxygen . what is the simplest formula of the compound (a)C_2H_4O_2 (b)C_2H_4O (c)C_2H_6O (d)CH_4O | |
| 2562. |
Q 14/15 Which of the following will not get octetnumber of electrons when they form compounds?1.Sc 2.Ti 3.V 4Zn |
| Answer» Q 14/15 Which of the following will not get octetnumber of electrons when they form compounds?1.Sc 2.Ti 3.V 4Zn | |
| 2563. |
When the lead is rejected and is accepted ? |
| Answer» When the lead is rejected and is accepted ? | |
| 2564. |
Select the correct graph from the below given options for an ideal gas. (Consider other factors constant which are not mentioned in the graphs)एक आदर्श गैस के लिए नीचे दिए गए विकल्पों में से सही ग्राफ का चयन कीजिए। (माना कि अन्य कारक नियत हैं जिन्हें ग्राफ में निर्दिष्ट नहीं किया गया है) |
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Answer» Select the correct graph from the below given options for an ideal gas. (Consider other factors constant which are not mentioned in the graphs) |
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| 2565. |
Give reasons for the following.Copper cannot displace zinc from its salt solution. |
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Answer» Give reasons for the following. Copper cannot displace zinc from its salt solution. |
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| 2566. |
Why cannot Skander hold ordinary paper (from Earth)? |
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Answer» Why cannot Skander hold ordinary paper (from Earth)? |
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| 2567. |
First ionization enthalpy of two elements X and Y are 500 kJ mol−1 and 375 kJ mol−1respectively. Comment about their relative positive in a group as well as in a period. |
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Answer» First ionization enthalpy of two elements X and Y are 500 kJ mol−1 and 375 kJ mol−1respectively. Comment about their relative positive in a group as well as in a period. |
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| 2568. |
Calculate the final volume of reaction mixture when 10l CO and 10l O_2 are allowed to react to maximum possible extent. Pressure and temperature are same. |
| Answer» Calculate the final volume of reaction mixture when 10l CO and 10l O_2 are allowed to react to maximum possible extent. Pressure and temperature are same. | |
| 2569. |
In carbon monoxide molecules the carbon and the oxygen atoms are separated by dis†an ce 1.2A^°. The dis†an ce of the centre of mass from carbon atom is______ |
| Answer» In carbon monoxide molecules the carbon and the oxygen atoms are separated by dis†an ce 1.2A^°. The dis†an ce of the centre of mass from carbon atom is______ | |
| 2570. |
42.Why first three alkanes don't have isomers? |
| Answer» 42.Why first three alkanes don't have isomers? | |
| 2571. |
Atomic number is Phosphorus is 15 Electronic configuration=K L. M 2. 8. 5 To form octet it requires 3 electron .Hence valency should be 3 but why is valency of Phosphorus is 5 as well as 3 .?? |
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Answer» Atomic number is Phosphorus is 15 Electronic configuration=K L. M 2. 8. 5 To form octet it requires 3 electron .Hence valency should be 3 but why is valency of Phosphorus is 5 as well as 3 .?? |
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| 2572. |
Resistance of 0.2 N solution of an electrolyte is 40 Ω. The specific conductance of the solution is 1.4 S m−1. Find the equivalent conductivity of the given solution. |
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Answer» Resistance of 0.2 N solution of an electrolyte is 40 Ω. The specific conductance of the solution is 1.4 S m−1. Find the equivalent conductivity of the given solution. |
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| 2573. |
What do you understand by the strength of an acid? On what factors does the strength of an acid depend? |
| Answer» What do you understand by the strength of an acid? On what factors does the strength of an acid depend? | |
| 2574. |
How many grams of NaOH is required to react with 3.1g of P4 to form PH3 and NaH2PO2? |
| Answer» How many grams of NaOH is required to react with 3.1g of P4 to form PH3 and NaH2PO2? | |
| 2575. |
What is tautomerism and how to decide a Compound Can be tautomerise or not.Also give a list of copund that cannot show tautomerism? |
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Answer» What is tautomerism and how to decide a Compound Can be tautomerise or not. Also give a list of copund that cannot show tautomerism? |
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| 2576. |
Define the following giving one example of each: [5 MARKS] 1. Esterification 2. Addition reaction |
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Answer» Define the following giving one example of each: [5 MARKS] |
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| 2577. |
Oleum is a combination of: |
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Answer» Oleum is a combination of: |
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| 2578. |
paisa coin is made up of Al-Mg alloy and weighs0.75 g. It has a square shape and its diagonalmeasures 17 mm. It is electrically neutral andcontains equal amounts of positive and negativecharges.Treating the paisa coins made up of only Al, themagnitude of equal number of positive and negativecharges is \lbrack mass of 1 mole of aluminium atoms-26.9815 g(1) 34.8 x 103 C(3) 52.2 x 103 C(2) 17.4 x 103 C(4) 69.6 x 103 Cnachh are fixed separated by |
| Answer» paisa coin is made up of Al-Mg alloy and weighs0.75 g. It has a square shape and its diagonalmeasures 17 mm. It is electrically neutral andcontains equal amounts of positive and negativecharges.Treating the paisa coins made up of only Al, themagnitude of equal number of positive and negativecharges is \lbrack mass of 1 mole of aluminium atoms-26.9815 g(1) 34.8 x 103 C(3) 52.2 x 103 C(2) 17.4 x 103 C(4) 69.6 x 103 Cnachh are fixed separated by | |
| 2579. |
The mass percentage of Fe^3+ ion present in fe(0.93)O(1.00) |
| Answer» The mass percentage of Fe^3+ ion present in fe(0.93)O(1.00) | |
| 2580. |
Fill in the blanks. (a) Fossil fuels are, and (b) Process of separation of different constituents from petroleum is called .(c) Least polluting fuel for vehicles is |
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Answer» Fill in the blanks. (a) Fossil fuels are (b) Process of separation of different constituents from petroleum is called (c) Least polluting fuel for vehicles is |
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| 2581. |
1.The vapour density of a volatile Cl of a metal is 74.6. If the specific heat of the metal is 0.55, then prove that atomic weight and formula of its chloride is 7.2 and MCl4. |
| Answer» 1.The vapour density of a volatile Cl of a metal is 74.6. If the specific heat of the metal is 0.55, then prove that atomic weight and formula of its chloride is 7.2 and MCl4. | |
| 2582. |
Analyze the reaction given below and identify the salt formed.FeO (aq) + HCl (aq)→Salt + H2O (l) |
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Answer» Analyze the reaction given below and identify the salt formed. |
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| 2583. |
23.What is the relationship between electrons and protons? |
| Answer» 23.What is the relationship between electrons and protons? | |
| 2584. |
General term of hm |
| Answer» General term of hm | |
| 2585. |
Gas analysis of sample shows that it has 20% H_2, 40% CH_4, 10% CO, 20% C_2H_6 and 10% non combustible inert gases (Volume%). 2m^3 volume of above sample is combusted (burnt) completely with oxygen. If\:X is the volume of air required (in m^3). Calculate the value of 10X/33. (Air consists 20% oxygen by volume) |
| Answer» Gas analysis of sample shows that it has 20% H_2, 40% CH_4, 10% CO, 20% C_2H_6 and 10% non combustible inert gases (Volume%). 2m^3 volume of above sample is combusted (burnt) completely with oxygen. If\:X is the volume of air required (in m^3). Calculate the value of 10X/33. (Air consists 20% oxygen by volume) | |
| 2586. |
Triethyl aluminium and titanium tetrachloride used in plastic industry is a |
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Answer» Triethyl aluminium and titanium tetrachloride used in plastic industry is a |
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| 2587. |
66. Vapour density of a gas having formula [CO]x is 70 find out x? |
| Answer» 66. Vapour density of a gas having formula [CO]x is 70 find out x? | |
| 2588. |
For group 1 elements ,what is the order of reactivity towerds water |
| Answer» For group 1 elements ,what is the order of reactivity towerds water | |
| 2589. |
What are the physical properties of ionic compounds? [5 MARKS] |
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Answer» What are the physical properties of ionic compounds? [5 MARKS] |
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| 2590. |
Electric field concept explanation |
| Answer» Electric field concept explanation | |
| 2591. |
43.Nitroglycerin is a highly unstable explosive. It decomposes into variety of reactions two of which are 2C3H5N3O6 becomes 6CO2+5H2+3N2 2C3H5N3O6becomesCO2+5CO+5H2O+3N2 Assume that these are only two reactions occurring when 100 molecules of nitroglycerin explode, producing 50 molecules of H2 gas. How many molecules of CO gas were also produced? |
| Answer» 43.Nitroglycerin is a highly unstable explosive. It decomposes into variety of reactions two of which are 2C3H5N3O6 becomes 6CO2+5H2+3N2 2C3H5N3O6becomesCO2+5CO+5H2O+3N2 Assume that these are only two reactions occurring when 100 molecules of nitroglycerin explode, producing 50 molecules of H2 gas. How many molecules of CO gas were also produced? | |
| 2592. |
15. An ion Mn a+ has the magnetic moment equal to 4.9 BM. The value of a is:(Z=25) |
| Answer» 15. An ion Mn a+ has the magnetic moment equal to 4.9 BM. The value of a is:(Z=25) | |
| 2593. |
What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur? (Hint − the eight atoms of sulphur are joined together in the form of a ring.) |
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Answer» What would be the electron dot structure of a molecule of sulphur which is made up of eight atoms of sulphur? (Hint − the eight atoms of sulphur are joined together in the form of a ring.) |
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| 2594. |
Which of the following electronic configuration of oxygen (O) atom is correct? |
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Answer» Which of the following electronic configuration of oxygen (O) atom is correct? |
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| 2595. |
Mention one commercial use of Agcl salt ? |
| Answer» Mention one commercial use of Agcl salt ? | |
| 2596. |
(a) Define pH.(b) State three applications of the pH scale. |
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Answer» (a) Define pH. (b) State three applications of the pH scale. |
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| 2597. |
Which of the following ion(s) are released when hard water reacts with soap? |
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Answer» Which of the following ion(s) are released when hard water reacts with soap? |
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| 2598. |
Question 2What are the rules to write the chemical formulas. |
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Answer» Question 2 What are the rules to write the chemical formulas. |
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| 2599. |
Salt that can be used in laboratory to prepare nitric acid is/are? |
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Answer» Salt that can be used in laboratory to prepare nitric acid is/are? |
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| 2600. |
Arrange S, O and Se in the ascending order of electron affinity. |
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Answer» Arrange S, O and Se in the ascending order of electron affinity. |
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