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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.
| 1651. |
Which group has only biodegradable materials? |
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Answer» Which group has only biodegradable materials? |
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| 1652. |
A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of |
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Answer» A catalyst does not change the position of equilibrium of a reversible reaction because it increases the rate of |
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| 1653. |
When zinc granules are added to dilute hydrochloric acid .what is happening around zinc granules? Is there any change in temperature? |
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Answer» When zinc granules are added to dilute hydrochloric acid .what is happening around zinc granules? Is there any change in temperature? |
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| 1654. |
Calculate the percentage of sodium in sodium aluminium fluoride (Na3AlF6) correct to the nearest whole number. (F= 19,Na = 23,Al = 27). |
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Answer» Calculate the percentage of sodium in sodium aluminium fluoride (Na3AlF6) correct to the nearest whole number. (F= 19,Na = 23,Al = 27). |
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| 1655. |
What is the functional unit of the environment comprising of the living and non-living components called? |
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Answer» What is the functional unit of the environment comprising of the living and non-living components called? |
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| 1656. |
Find the total number of monochlorinated products formed from pure reactant given. |
Answer»  Find the total number of monochlorinated products formed from pure reactant given. |
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| 1657. |
Zinc oxide reacts with both Ca(OH)2 and H2SO4, thus it is an example of a/an ________. |
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Answer» Zinc oxide reacts with both Ca(OH)2 and H2SO4, thus it is an example of a/an ________. |
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| 1658. |
The number of water molecules acting as ligands in CuSO4.5H2O, ZnSO4.5H2O, FeSO4.7H2O respectively are: |
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Answer» The number of water molecules acting as ligands in CuSO4.5H2O, ZnSO4.5H2O, FeSO4.7H2O respectively are: |
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| 1659. |
What is the full form of IAA? |
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Answer» What is the full form of IAA? |
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| 1660. |
order of stability of carbocation ? (1) phenyl carbonium (2) tertiary carbocation (3)secondary carbocatio |
| Answer» order of stability of carbocation ? (1) phenyl carbonium (2) tertiary carbocation (3)secondary carbocatio | |
| 1661. |
Question 13Plaster of Paris should be stored in a moisture-proof container. Explain why. |
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Answer» Question 13 Plaster of Paris should be stored in a moisture-proof container. Explain why. |
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| 1662. |
21. Which among CH4 and CCl4 is highly polar and why |
| Answer» 21. Which among CH4 and CCl4 is highly polar and why | |
| 1663. |
perature of ideal gas is increased from 27'C to 927 C, the rms speed of molecule will become(1) Twice(3) Four times(2) Half(4) One fourth |
| Answer» perature of ideal gas is increased from 27'C to 927 C, the rms speed of molecule will become(1) Twice(3) Four times(2) Half(4) One fourth | |
| 1664. |
Among the following, the rate of formation of bubbles, when it is reacted with acid, is fastest in case of _________. |
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Answer» Among the following, the rate of formation of bubbles, when it is reacted with acid, is fastest in case of _________. |
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| 1665. |
5. Concentrated nitric acid used in lab work is 68% nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is 1.504 g/mL. |
| Answer» 5. Concentrated nitric acid used in lab work is 68% nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is 1.504 g/mL. | |
| 1666. |
6. Crude calcium carbide is made in an electric furance by the following reaction: CaO + 3C ----> CaC2 + CO The product contains 85% of CaC2 and 15% of CaO is unreacted. Then find: 1) How much Cao is to be added to the furnace charge for each 1000 kg of crude product? 2) How much CaO is to be added to the furnace charge for each 1000 kg CaC2 (pure) produced? |
| Answer» 6. Crude calcium carbide is made in an electric furance by the following reaction: CaO + 3C ----> CaC2 + CO The product contains 85% of CaC2 and 15% of CaO is unreacted. Then find: 1) How much Cao is to be added to the furnace charge for each 1000 kg of crude product? 2) How much CaO is to be added to the furnace charge for each 1000 kg CaC2 (pure) produced? | |
| 1667. |
Upon reaction of ethanol with ethanoic acid in concentrated H2SO4, a compound of ___is produced. |
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Answer» Upon reaction of ethanol with ethanoic acid in concentrated H2SO4, a compound of ___is produced. |
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| 1668. |
The first step in the manufacture of Nitric acid is the catalytic oxidation of Ammonia. What is the name of the catalyst? |
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Answer» The first step in the manufacture of Nitric acid is the catalytic oxidation of Ammonia. What is the name of the catalyst? |
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| 1669. |
Velocities of the molecules are |
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Answer» Velocities of the molecules are |
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| 1670. |
84. A compound contains 40% nitrogen and 60% of metal by weight. Three atoms of the metal combine with one atom of nitrogen.Atomic weight of the metal is? |
| Answer» 84. A compound contains 40% nitrogen and 60% of metal by weight. Three atoms of the metal combine with one atom of nitrogen.Atomic weight of the metal is? | |
| 1671. |
Butanone is a four-carbon compound having the functional group : (a) −COOH (b) −CHO (c) −CO− (d) −OH |
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Answer» Butanone is a four-carbon compound having the functional group : |
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| 1672. |
Which of the following is a gaseous non-metal? |
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Answer» Which of the following is a gaseous non-metal? |
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| 1673. |
Which of the following methods, A, B, C, D, or E is generally used for preparing the chlorides listed below from (i) to (v). Answer by writing down the chloride and the letter pertaining to the corresponding method. Each letter is to be used only once. A. The action of an acid on a metal, B. The action of an acid on an oxide or carbonate, C. Direct combination, D. Neutralization of an alkali by an acid E. Precipitation (double decomposition) (i) Copper (II) chloride (ii) Iron (II) chloride (iii) Iron (III) chloride (iv) Lead (II) chloride (v) Sodium chloride |
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Answer» Which of the following methods, A, B, C, D, or E is generally used for preparing the chlorides listed below from (i) to (v). Answer by writing down the chloride and the letter pertaining to the corresponding method. Each letter is to be used only once. A. The action of an acid on a metal, B. The action of an acid on an oxide or carbonate, C. Direct combination, D. Neutralization of an alkali by an acid E. Precipitation (double decomposition) (i) Copper (II) chloride (ii) Iron (II) chloride (iii) Iron (III) chloride (iv) Lead (II) chloride (v) Sodium chloride |
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| 1674. |
Name a compound of each type and draw the figure. [2 MARKS] (a) Cyclic compound with single bond. (b) Cyclic compound with triple bond. |
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Answer» Name a compound of each type and draw the figure. [2 MARKS] (a) Cyclic compound with single bond. (b) Cyclic compound with triple bond. |
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| 1675. |
Hydrogen chloride gas is very soluble in water. It is dissolved in water to prepare hydrochloric acid by using an anti-suction device, as shown in the diagram. Very briefly explain, how this device prevents the suction of water into the flask, in which hydrogen chloride gas is produced. |
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Answer» Hydrogen chloride gas is very soluble in water. It is dissolved in water to prepare hydrochloric acid by using an anti-suction device, as shown in the diagram. Very briefly explain, how this device prevents the suction of water into the flask, in which hydrogen chloride gas is produced. |
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| 1676. |
Which of the following has least mass: 2 g atom of nitrogen, 3*10^23 atoms of C, 1 mole of S, 7 g of Ag? |
| Answer» Which of the following has least mass: 2 g atom of nitrogen, 3*10^23 atoms of C, 1 mole of S, 7 g of Ag? | |
| 1677. |
why do the halogens show high tendency to form compounds with alkali metals and earth metals? |
| Answer» why do the halogens show high tendency to form compounds with alkali metals and earth metals? | |
| 1678. |
Acidic strength of H_2SO_3, H_2SO_4, H_2S_2O_3 |
| Answer» Acidic strength of H_2SO_3, H_2SO_4, H_2S_2O_3 | |
| 1679. |
Write three equations to show that hydrochloric acid acts as an acid. |
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Answer» Write three equations to show that hydrochloric acid acts as an acid. |
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| 1680. |
How do we classify materials based on their hardness? Explain. |
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Answer» How do we classify materials based on their hardness? Explain. |
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| 1681. |
what is oxidising nature? |
| Answer» what is oxidising nature? | |
| 1682. |
What is the difference between the chemical nature of an aqueous solution of hydrogen chloride and an aqueous solution of ammonia? |
| Answer» What is the difference between the chemical nature of an aqueous solution of hydrogen chloride and an aqueous solution of ammonia? | |
| 1683. |
When we dip ___ litmus paper in an acidic medium it will turn into ___. |
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Answer» When we dip |
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| 1684. |
Two moles of an ideal gas (CV= 52 R) was compressed adiabatically against constant pressure of 2 atm.which was initially at 350 K and 1 atm pressure. The work involve in the process is equal to ? |
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Answer» Two moles of an ideal gas (CV = 5 2 R) was compressed adiabatically against constant pressure of 2 atm. which was initially at 350 K and 1 atm pressure. The work involve in the process is equal to ? |
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| 1685. |
Why is molar conductivity dependent on conc. Whereas equv. Conductivity independent off conc. |
| Answer» Why is molar conductivity dependent on conc. Whereas equv. Conductivity independent off conc. | |
| 1686. |
Match the following fractions with their equivalent fractional forms. |
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Answer» Match the following fractions with their equivalent fractional forms. |
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| 1687. |
Define the following, giving one example of each: (i) Esterification (ii) Addition reaction |
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Answer» Define the following, giving one example of each: |
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| 1688. |
1. Mendeleev's periodic table did not have noble gases in it. Then how come Ar, Ca be placed as anomalous pair( pair in which heavier mass elent has been placed first with the lighter mass element next)? |
| Answer» 1. Mendeleev's periodic table did not have noble gases in it. Then how come Ar, Ca be placed as anomalous pair( pair in which heavier mass elent has been placed first with the lighter mass element next)? | |
| 1689. |
What are the four main steps involved in extraction of metals from their ores??? |
| Answer» What are the four main steps involved in extraction of metals from their ores??? | |
| 1690. |
The lustre of a metal is due to: |
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Answer» The lustre of a metal is due to: |
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| 1691. |
Write the equations to show the reactions between the following:(i) dilute nitric acid to produce carbon dioxide.(ii) between cooper and concentrated nitric acid. |
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Answer» Write the equations to show the reactions between the following: (i) dilute nitric acid to produce carbon dioxide. (ii) between cooper and concentrated nitric acid. |
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| 1692. |
Among the following metals, the metal that can displace zinc from zinc sulphate solution is: |
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Answer» Among the following metals, the metal that can displace zinc from zinc sulphate solution is: |
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| 1693. |
Hard water required for an experiment is not available in a school laboratory. However, following salts are available in the laboratory. Select the salts which may be dissolved in water to make it hard for the experiment (1) Calcium Sulphate (2) Sodium Sulphate (3) Calcium Chloride (4) Potassium Sulphate (5) Sodium Hydrogen Carbonate (6) Magnesium Chloride |
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Answer» Hard water required for an experiment is not available in a school laboratory. However, following salts are available in the laboratory. Select the salts which may be dissolved in water to make it hard for the experiment (1) Calcium Sulphate (2) Sodium Sulphate (3) Calcium Chloride (4) Potassium Sulphate (5) Sodium Hydrogen Carbonate (6) Magnesium Chloride |
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| 1694. |
The two lines A and B , shown in figure are the graphs of the de-Broglie wavelength λ as a function of 1√V (V is the accelerating potential) for two particles having the same charge. Identify the correct option about the mass of the particles- |
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Answer» The two lines A and B , shown in figure are the graphs of the de-Broglie wavelength λ as a function of 1√V (V is the accelerating potential) for two particles having the same charge. Identify the correct option about the mass of the particles- |
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| 1695. |
Write the structural formula for 4-iodononane. |
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Answer» Write the structural formula for 4-iodononane. |
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| 1696. |
Differentiate between ketone and aldehyde. With examples. |
| Answer» Differentiate between ketone and aldehyde. With examples. | |
| 1697. |
Question 3An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:a) Calciumb) Carbonc) Silicond) Iron |
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Answer» Question 3 An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be: a) Calcium b) Carbon c) Silicon d) Iron |
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| 1698. |
the number of electron in a neutral atom of an element is equal to: a. atomic weight b. atomic number c. equivalent weight d. electron affinit |
| Answer» the number of electron in a neutral atom of an element is equal to: a. atomic weight b. atomic number c. equivalent weight d. electron affinit | |
| 1699. |
Na2CO3 + 10 H2OO ------>Na2CO3.10 H2O. SO IN THE PRODUCT SIDE( Na2CO3.10 H2o) what does the dot (.) Represent? |
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Answer» Na2CO3 + 10 H2OO ------>Na2CO3.10 H2O. SO IN THE PRODUCT SIDE( Na2CO3.10 H2o) what does the dot (.) Represent? |
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| 1700. |
What is polarising power and what is its trend in periodic table? |
| Answer» What is polarising power and what is its trend in periodic table? | |
