InterviewSolution
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InterviewSolution
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.
| 401. |
Assertion and reason . A- in the manufacturing of NH3 by the reaction of 50 gm N2 gas with 10gm of H2 gas, H2 gas acts as a limiting reagent. R- 3 mole of H2 gas requires 1 mole of N2 gas for the formation of 2 mole NH3 gas. |
| Answer» Assertion and reason . A- in the manufacturing of NH3 by the reaction of 50 gm N2 gas with 10gm of H2 gas, H2 gas acts as a limiting reagent. R- 3 mole of H2 gas requires 1 mole of N2 gas for the formation of 2 mole NH3 gas. | |
| 402. |
Pressure of a gas in a vessel can be measured by ___ |
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Answer» Pressure of a gas in a vessel can be measured by |
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| 403. |
Q1. a glass bulb is connected to an open limb manometer. The level of mercury in both the limbs of the manometer was same. The bulb was heated to 57C. If the room temperature and atmospheric pressure were 27C and 750 mm, the difference of levels in the two limbs now will be : A. 2.5 cm B. 5.0 cm C. 7.5 cm D. 10.0 cm Q2. Air vessel at 127C is heated until 1/5th of air in it has been expelled. Assuming that the volume of vessel remains constant the temperature to which the vessel has been heated is A. 177C B. 277C C. 377C D. 227C |
| Answer» Q1. a glass bulb is connected to an open limb manometer. The level of mercury in both the limbs of the manometer was same. The bulb was heated to 57C. If the room temperature and atmospheric pressure were 27C and 750 mm, the difference of levels in the two limbs now will be : A. 2.5 cm B. 5.0 cm C. 7.5 cm D. 10.0 cm Q2. Air vessel at 127C is heated until 1/5th of air in it has been expelled. Assuming that the volume of vessel remains constant the temperature to which the vessel has been heated is A. 177C B. 277C C. 377C D. 227C | |
| 404. |
___ is used in the treatment of cancer and other diseases. |
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Answer» ___ is used in the treatment of cancer and other diseases. |
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| 405. |
Notice these expressions in the poem and guess their meaning from the context: rancid breath squelching tar spectroscopic flight of fancy rearing on the thunderclap brunette peroxide blonde clinical assent raven black |
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Answer» Notice these expressions in the poem and guess their meaning from the context:
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| 406. |
13.Explain the covalency of carbon in CO |
| Answer» 13.Explain the covalency of carbon in CO | |
| 407. |
Name the salt which is mixed with carbon dioxide and calcium carbonate in the manufacturing of glass. |
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Answer» Name the salt which is mixed with carbon dioxide and calcium carbonate in the manufacturing of glass. |
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| 408. |
Q1. Why PCl5 is ionic in solid state ?Q2. Why does NH3 have a greater bond angle than PH3 ? |
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Answer» Q1. Why PCl5 is ionic in solid state ? Q2. Why does NH3 have a greater bond angle than PH3 ? |
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| 409. |
The temperature of a room heated by a heater is 25^° C, when outside temperature is 15^° C, and it is 15^° C when outside temperature is 0^° C. The temperature of the heater is :Options are: a)30^° b)45^° c)60^° d)75^° |
| Answer» The temperature of a room heated by a heater is 25^° C, when outside temperature is 15^° C, and it is 15^° C when outside temperature is 0^° C. The temperature of the heater is :Options are: a)30^° b)45^° c)60^° d)75^° | |
| 410. |
According to Dalton's atomic theory chemical reactions involve: |
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Answer» According to Dalton's atomic theory chemical reactions involve: |
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| 411. |
An ionic compound AB has flourite type structures. If the radius of B- is 200ppm, then the radius of A+ would be |
| Answer» An ionic compound AB has flourite type structures. If the radius of B- is 200ppm, then the radius of A+ would be | |
| 412. |
"The components of the soil determine the types of vegetation and crops that grow in a particular area." Do you agree? Justify using examples. [5 MARKS] |
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Answer» "The components of the soil determine the types of vegetation and crops that grow in a particular area." Do you agree? Justify using examples. [5 MARKS] |
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| 413. |
why does conduction decreases when we increase the concentration of solution |
| Answer» why does conduction decreases when we increase the concentration of solution | |
| 414. |
Which reaction causes depletion of Ozone layer? |
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Answer» Which reaction causes depletion of Ozone layer? |
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| 415. |
When it is gently warmed, Sodium thiosulphate pentahydrate loses its water of crystallization. Na2S2O3.5H2O is commonly called __. |
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Answer» When it is gently warmed, Sodium thiosulphate pentahydrate loses its water of crystallization. Na2S2O3.5H2O is commonly called |
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| 416. |
Which of the following properties generally increases on moving from top to bottom ? |
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Answer» Which of the following properties generally increases on moving from top to bottom ? |
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| 417. |
If two isotopes of chlorine are in the ratio 3:1, if the isotope ratio is reversed the average atomic mass of chlorine is? |
| Answer» If two isotopes of chlorine are in the ratio 3:1, if the isotope ratio is reversed the average atomic mass of chlorine is? | |
| 418. |
The factors which affect the rate of the reaction are |
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Answer» The factors which affect the rate of the reaction are |
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| 419. |
Mendeleev’s periodic law states that the properties of elements are a periodic function of their |
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Answer» Mendeleev’s periodic law states that the properties of elements are a periodic function of their |
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| 420. |
Aluminium is higher than iron in the reactivity series. To see if this was true, Ayesha took similar sized pieces of aluminium and iron in test tubes. She added the same volume of dilute hydrochloric acid to each. She noticed that:1. Initially there is more vigorous evolution of gas from the test tube having iron.2. After a couple of minutes, aluminium starts reacting much faster than iron and evolution of gas is much more vigorous.She was confused. Can you explain to her why this happened? |
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Answer» Aluminium is higher than iron in the reactivity series. To see if this was true, Ayesha took similar sized pieces of aluminium and iron in test tubes. She added the same volume of dilute hydrochloric acid to each. She noticed that: 1. Initially there is more vigorous evolution of gas from the test tube having iron. 2. After a couple of minutes, aluminium starts reacting much faster than iron and evolution of gas is much more vigorous. She was confused. Can you explain to her why this happened? |
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| 421. |
Why pH is known as universal indicator? |
| Answer» Why pH is known as universal indicator? | |
| 422. |
(a) Define S.T.P. or N.T.P. (b) Why is it necessary to compare gases at S.T.P.? |
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Answer» (a) Define S.T.P. or N.T.P. |
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| 423. |
calculate the diameter of first oxidation state of He ion |
| Answer» calculate the diameter of first oxidation state of He ion | |
| 424. |
What is the structure of an atom |
| Answer» What is the structure of an atom | |
| 425. |
Which electron removal from the valence shell in carbon atom requires the highest energy? |
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Answer» Which electron removal from the valence shell in carbon atom requires the highest energy? |
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| 426. |
Which of the following shows the least chemical reactivity? |
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Answer» Which of the following shows the least chemical reactivity? |
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| 427. |
Hydrogen forms only one bond, valency of hydrogen is- |
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Answer» Hydrogen forms only one bond, valency of hydrogen is- |
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| 428. |
INDUSTRIAL USES OF HYDROGEN SULFIDE |
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Answer» INDUSTRIAL USES OF HYDROGEN SULFIDE |
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| 429. |
A mixture of two immiscible liquid A and B is distilled under equilibrium condition at 1atm pressure. Assuming ideal gas behavior calculate the mole fraction of A in the distillate if the vapour pressure of pure B is 425 torr? |
| Answer» A mixture of two immiscible liquid A and B is distilled under equilibrium condition at 1atm pressure. Assuming ideal gas behavior calculate the mole fraction of A in the distillate if the vapour pressure of pure B is 425 torr? | |
| 430. |
State how CFC break ozone layer. |
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Answer» State how CFC break ozone layer. |
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| 431. |
How many moles of oxygen atoms are there in 1.2×1022 sulphur dioxide molecules? |
| Answer» How many moles of oxygen atoms are there in 1.2×1022 sulphur dioxide molecules? | |
| 432. |
why amu changes to u |
| Answer» why amu changes to u | |
| 433. |
Which state of matter do the following images represent? |
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Answer» Which state of matter do the following images represent? |
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| 434. |
5. How many metalloids are present in the periodic table and what are their names?? |
| Answer» 5. How many metalloids are present in the periodic table and what are their names?? | |
| 435. |
which of the following can show resonance? give reason 1.CH2=CH-CH=CH2 2. CH2=CH-CHO 3.CH2=CH-NH2 4. All of these |
| Answer» which of the following can show resonance? give reason 1.CH2=CH-CH=CH2 2. CH2=CH-CHO 3.CH2=CH-NH2 4. All of these | |
| 436. |
assertion :One mole of sucrose reacts completely withoxygen produces 268.8 litre of carbon dioxideat STP . Reason.Amount of oxygen required for reaction is268.8 litre. |
| Answer» assertion :One mole of sucrose reacts completely withoxygen produces 268.8 litre of carbon dioxideat STP . Reason.Amount of oxygen required for reaction is268.8 litre. | |
| 437. |
All alkalis are bases but all bases are not alkalis. Give reason. |
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Answer» All alkalis are bases but all bases are not alkalis. Give reason. |
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| 438. |
(p+a/v)(v-b) =RT, p=pressure,v=volume,R,a,b are constant, T=absolute temperature. find dimension of a/b^2 |
| Answer» (p+a/v)(v-b) =RT, p=pressure,v=volume,R,a,b are constant, T=absolute temperature. find dimension of a/b^2 | |
| 439. |
What is the correct order of the methods you would apply to separate the components of a mixture of ammonium chloride, common salt and sand ?(1) dissolving in water, filtration, evaporation and sublimation(2) dissolving in water, evaporation and sublimation(3) sublimation, dissolving in water, filtration and evaporation(4) moving a magnet, dissolving in water and sublimation |
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Answer» What is the correct order of the methods you would apply to separate the components of a mixture of ammonium chloride, common salt and sand ? (1) dissolving in water, filtration, evaporation and sublimation (2) dissolving in water, evaporation and sublimation (3) sublimation, dissolving in water, filtration and evaporation (4) moving a magnet, dissolving in water and sublimation |
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| 440. |
How many carbon atoms are involved in the making of man made Carbon allotrope fullerene? |
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Answer» How many carbon atoms are involved in the making of man made Carbon allotrope fullerene? |
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| 441. |
Why was Rutherford Adamant that the electrons in the atom constantly revolve around the nucleus? |
| Answer» Why was Rutherford Adamant that the electrons in the atom constantly revolve around the nucleus? | |
| 442. |
6.How CCl4 and CF4 are organic compound ? |
| Answer» 6.How CCl4 and CF4 are organic compound ? | |
| 443. |
Which of the following compounds is not an electrovalent (ionic) compound? |
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Answer» Which of the following compounds is not an electrovalent (ionic) compound? |
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| 444. |
The crystalline salt of Na2So4.xH2O on heating loses 55.9% of its mass and becomes anhydrous . the formula of crystalline salt is |
| Answer» The crystalline salt of Na2So4.xH2O on heating loses 55.9% of its mass and becomes anhydrous . the formula of crystalline salt is | |
| 445. |
Can matter change its state? |
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Answer» Can matter change its state? |
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| 446. |
Calculate the pH of 2.0 x10^-^4M H_{}X Solution assuming first dissociation to be 100 %, second tobe 50% and third to be negligible |
| Answer» Calculate the pH of 2.0 x10^-^4M H_{}X Solution assuming first dissociation to be 100 %, second tobe 50% and third to be negligible | |
| 447. |
what is electron sea mode |
| Answer» what is electron sea mode | |
| 448. |
Tick the correct answer:- In a homogeneous solution, the dimension of solute particles varies between: a. 1 – 103 nm b. 104 - 106 nm c. 105 - 106 nm d. 108 – 109 nm |
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Answer» Tick the correct answer:- In a homogeneous solution, the dimension of solute particles varies between: |
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| 449. |
What are metalloids ? Name the metal which melts if taken on our palm. |
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Answer» What are metalloids ? Name the metal which melts if taken on our palm. |
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| 450. |
1 g of helium gas is confined in a two litre flask under a pressure of 2.05 atm what is its temperature |
| Answer» 1 g of helium gas is confined in a two litre flask under a pressure of 2.05 atm what is its temperature | |