100525 + Interview Questions in GENERAL QA IN GENERAL AWARENESS

1.	The mass, specific heat capacity and the temperature of a solid are `1000g,(1)/(2) (cal)/g ^(@)C` and `80^(@)C` respectively. The mass of the liquid and the calorimeter are `900g` and `200g`. Initially,both are at room temperature `20^(@)C` Both calorimeter and the solid are made of same material. In the steady state, temperature of mixture is `40^(@)C`, then specific heat capacity of the unknown liquid.
Answer» `S=((1000)(1//2)(80^(@)-40^(@)))/(900(40^(@)-20^@))-((200)(1//2))/(900)=1cal//gm^(@)C` .

Discussion

2.	Answer the following questions according to the text.After finishing school they got jobs working together at a medical school hospital which their university had been affiliated with. The four years of intense training they had obtained made them suitable for positions not often given to new graduates. After a short inservice program they were assigned to their wards and began working with patients who had undergone major surgery. The new group of nurses proved to be excellent professionals. At the same time, they were able to maintain the close bonds of friendship that had developed between them before graduation. 1. The new nurses were trained _____. A) in the hospital before they began to work. B) for four years in an intensive university program. C) for major surgery. D) to be professionals and to maintain their bonds. E) by the medical school. 2. Their training _____. A) was better than that of other students. B) taught them to care about each other. C) took place in an affiliated school. D) was in their service position. E) was not usually given to new graduates. 3. The best TITLE for this passage is _____. A) Training of Nurses. B) Graduation and the Nurse C) What They Did After School D) The New Professionals. E) A Job in the Hospital.
Answer» 1 B) for four years in an intensive university program. 2 A) was better than that of other students 3 D) The New Professionals.

2.

Answer the following questions according to the text.After finishing school they got jobs working together at a medical school hospital which their university had been affiliated with. The four years of intense training they had obtained made them suitable for positions not often given to new graduates. After a short inservice program they were assigned to their wards and began working with patients who had undergone major surgery. The new group of nurses proved to be excellent professionals. At the same time, they were able to maintain the close bonds of friendship that had developed between them before graduation. 1. The new nurses were trained ___. A) in the hospital before they began to work. B) for four years in an intensive university program. C) for major surgery. D) to be professionals and to maintain their bonds. E) by the medical school. 2. Their training _. A) was better than that of other students. B) taught them to care about each other. C) took place in an affiliated school. D) was in their service position. E) was not usually given to new graduates. 3. The best TITLE for this passage is ___. A) Training of Nurses. B) Graduation and the Nurse C) What They Did After School D) The New Professionals. E) A Job in the Hospital.

Answer»

1 B) for four years in an intensive university program.

2 A) was better than that of other students

3 D) The New Professionals.

Discussion

3.	Answer the following questions according to the text.One of the most magnificent touristic sights in the Black Sea region of Turkey is the Sumela Monastery. The white walls of the monastery stand out sharply from the one thousand-foot cliff which it was carved out of. It is a seven-storey complex which was carved into the walls of the cliff. Monks had lived in the caves of this cliff for hundreds of years before it reached its final form. It was abandoned in 1923 and left to waste for decades. 1. The Sumela Monastery is unique because _____. A) it is 7 storey. B) it has 7 different tales told of its origin. C) it is located in the Black Sea. D) it is one thousand feet tall. E) it was not built on the cliff but in it.2. It has decayed because _____. A) no one has resided there for many years. B) the monk’s don’t live there. C) the caves are not as good as they were. D) tourists don’t want to see it. E) it is situated in an unusual place. 3. The monks _____. A) used to hide in its 7 floors.B) lived in its caves. C) preferred the cliffs. D) did not want to climb the cliffs. E) used it as a place of worship.
Answer» 1 E) it was not built on the cliff but in it. 2 A) no one has resided there for many years 3 B) lived in its caves

3.

Answer the following questions according to the text.One of the most magnificent touristic sights in the Black Sea region of Turkey is the Sumela Monastery. The white walls of the monastery stand out sharply from the one thousand-foot cliff which it was carved out of. It is a seven-storey complex which was carved into the walls of the cliff. Monks had lived in the caves of this cliff for hundreds of years before it reached its final form. It was abandoned in 1923 and left to waste for decades. 1. The Sumela Monastery is unique because ___. A) it is 7 storey. B) it has 7 different tales told of its origin. C) it is located in the Black Sea. D) it is one thousand feet tall. E) it was not built on the cliff but in it.2. It has decayed because _. A) no one has resided there for many years. B) the monk’s don’t live there. C) the caves are not as good as they were. D) tourists don’t want to see it. E) it is situated in an unusual place. 3. The monks ___. A) used to hide in its 7 floors.B) lived in its caves. C) preferred the cliffs. D) did not want to climb the cliffs. E) used it as a place of worship.

Answer»

1 E) it was not built on the cliff but in it.

2 A) no one has resided there for many years

3 B) lived in its caves

Discussion

4.	Answer the following questions according to the text.Ballet dancers were originally all men. Women only began to appear in performances in 1681, in Paris. The encouragement of King Louis XIV of France is greatly responsible for the establishment of ballet as one of the major art forms it is seen as today. Many young girls begin ballet lessons at the age of 5 or so and train for many years before they are good enough to perform. Most never do perform at all but the graceful movements and control of the body acquired by anyone who has ballet training, encourages parents to obtain at least several years of lessons for their young daughters. 1. Parents _____. A) want their children to learn to be dancers. B) want their children to have graceful form. C) want their children to be able to control their bodies with grace. D) want their children to train for five years to perform. E) make their children learn to be a ballerina. 2. King Louis XIV _____. A) encouraged and supported the art of ballet. B) assisted dancers to learn ballet. C) had graceful movements and body control. D) supported ballet so he could take lessons. E) made women dance with men during ballet performances. 3. Women _____. A) performed ballet before men. B) did not perform in France. C) perform better than men. D) were not the original dancers. E) were supporters of Louis XIV.
Answer» 1 C) want their children to be able to control their bodies with grace. 2 A) encouraged and supported the art of ballet. 3 D) were not the original dancers.

4.

Answer the following questions according to the text.Ballet dancers were originally all men. Women only began to appear in performances in 1681, in Paris. The encouragement of King Louis XIV of France is greatly responsible for the establishment of ballet as one of the major art forms it is seen as today. Many young girls begin ballet lessons at the age of 5 or so and train for many years before they are good enough to perform. Most never do perform at all but the graceful movements and control of the body acquired by anyone who has ballet training, encourages parents to obtain at least several years of lessons for their young daughters. 1. Parents ___. A) want their children to learn to be dancers. B) want their children to have graceful form. C) want their children to be able to control their bodies with grace. D) want their children to train for five years to perform. E) make their children learn to be a ballerina. 2. King Louis XIV _. A) encouraged and supported the art of ballet. B) assisted dancers to learn ballet. C) had graceful movements and body control. D) supported ballet so he could take lessons. E) made women dance with men during ballet performances. 3. Women ___. A) performed ballet before men. B) did not perform in France. C) perform better than men. D) were not the original dancers. E) were supporters of Louis XIV.

Answer»

1 C) want their children to be able to control their bodies with grace.

2 A) encouraged and supported the art of ballet.

3 D) were not the original dancers.

Discussion

5.	Answer the following questions according to the text.The child followed his grandmother into the garden. As they walked slowly towards the little building in the back the child heard strange noises and suddenly stopped. The grandmother turned and laughed warmly at her grandson’s frightful expression. He had never been this close to animals before and was too young to recognize the sounds he heard. She handed him the bowl she had been carrying in her hand and picked him up. In the safety of her arms he relaxed and together, they entered the coop to feed the chickens. 1. The child was frightened of _____. A) the building at the back of the garden. B) the animal noises from the coop. C) the chickens. D) his grandmother’s laughter. E) the bowl in his grandmother’s hands. 2. The grandmother picked up her grandson _____. A) so that she could walk quicker. B) to reassure him. C) so he would not run away. D) because he could no longer walk. E) to show him the coop. 3. They were going _____. A) to feed the chickens.B) to relax in the garden. C) to take some exercise. D) to see what the noise was about. E) to get the bowl.
Answer» 1 B) the animal noises from the coop 2 B) to reassure him. 3 A) to feed the chickens

5.

Answer the following questions according to the text.The child followed his grandmother into the garden. As they walked slowly towards the little building in the back the child heard strange noises and suddenly stopped. The grandmother turned and laughed warmly at her grandson’s frightful expression. He had never been this close to animals before and was too young to recognize the sounds he heard. She handed him the bowl she had been carrying in her hand and picked him up. In the safety of her arms he relaxed and together, they entered the coop to feed the chickens. 1. The child was frightened of ___. A) the building at the back of the garden. B) the animal noises from the coop. C) the chickens. D) his grandmother’s laughter. E) the bowl in his grandmother’s hands. 2. The grandmother picked up her grandson _. A) so that she could walk quicker. B) to reassure him. C) so he would not run away. D) because he could no longer walk. E) to show him the coop. 3. They were going ___. A) to feed the chickens.B) to relax in the garden. C) to take some exercise. D) to see what the noise was about. E) to get the bowl.

Answer»

1 B) the animal noises from the coop

2 B) to reassure him.

3 A) to feed the chickens

Discussion

6.	Which of the following structures is the most preferred and hence of lowest energy for SO3 ?
Answer» (d) Formal charges help in the selection of the lowest energy structure from a number of possible Lewis structures for a given compound. The lowest energy structure means the structure with the smallest formal charge on each atom of the compound. A Lewis dot structure is preferable when all formal charges are zero.

Discussion

7.	Which one of the following arrangements does not give the correct picture of the trends indicated against it ?(i) F2 > Cl2 > Br2 > I2 : Oxidizing power(ii) F2 > Cl2 > Br2 > I2 : Electron gain enthalpy(iii) F2 > Cl2 > Br2 > I2 : Bond dissociation energy(iv) F2 > Cl2 > Br2 > I2 : Electronegativity.(a) (ii) and (iv) (b) (i) and (iii)(c) (ii) and (iii) (d) (ii), (iii) and (iv)
Answer» (c) From the given options we find option (a) is correct. The oxidising power of halogens follow the order F₂ > Cl₂ > Br₂> I₂ . Option (b) is incorrect because it in not the correct order of electron gain enthalpy of halogens. The correct order is Cl₂ > F₂ > Br₂> I₂ . The low value of F₂ than Cl₂ is due to its small size. Option (c) is incorrect. The correct order of bond dissociation energies of halogens is Cl₂ > Br₂ > F₂ > I₂ . Option (d) is correct. It is the correct order of electronegativity values of halogens. Thus option (b) and (c) are incorrect

Discussion

8.	________ paper was first used by the Chinese. A) That the belief B) The belief that C) To believe that D) It is believed that
Answer» Correct option is D) It is believed that

Discussion

9.	Answer the following questions according to the text.The first confirmation of the existence of an ice continent at the South Pole was made by the Bellinghausen expedition of 1820. This expedition was made for Imperial Russia. In 1959, the Antarctic Treaty was signed by 17 nations. This treaty protects the continent from territorial claims by any other country and maintains it as a continent set aside for scientific studies. This natural laboratory has many research bases on it, set up by various countries of the world. Most of these, work together to obtain information, for scientific study.1. Antarctica is used _____. A) by the Russians. B) as a military base. C) by various countries of the world for their own use. D) by only 17 nations. E) to establish territorial claims. 2. The Antarctic continent was _____. A) first discovered in 1820. B) protected from scientists. C) a possession of Imperial Russia. D) a part of the Bellinghausen expedition. E) owned by the Russians. 3. The Antarctic Treaty _____. A) protects the continent from further expeditions. B) was signed at the North Pole. C) was prepared by the Bellinghausen expedition. D) was prepared in 1959. E) protects it from any country that might want to claim it as their own.
Answer» 1 D) by only 17 nations 2 A) first discovered in 1820 3 E) protects it from any country that might want to claim it as their own.

9.

Answer the following questions according to the text.The first confirmation of the existence of an ice continent at the South Pole was made by the Bellinghausen expedition of 1820. This expedition was made for Imperial Russia. In 1959, the Antarctic Treaty was signed by 17 nations. This treaty protects the continent from territorial claims by any other country and maintains it as a continent set aside for scientific studies. This natural laboratory has many research bases on it, set up by various countries of the world. Most of these, work together to obtain information, for scientific study.1. Antarctica is used ___. A) by the Russians. B) as a military base. C) by various countries of the world for their own use. D) by only 17 nations. E) to establish territorial claims. 2. The Antarctic continent was _. A) first discovered in 1820. B) protected from scientists. C) a possession of Imperial Russia. D) a part of the Bellinghausen expedition. E) owned by the Russians. 3. The Antarctic Treaty ___. A) protects the continent from further expeditions. B) was signed at the North Pole. C) was prepared by the Bellinghausen expedition. D) was prepared in 1959. E) protects it from any country that might want to claim it as their own.

Answer»

1 D) by only 17 nations

2 A) first discovered in 1820

3 E) protects it from any country that might want to claim it as their own.

Discussion

10.	Antarctica is larger ________ , but it has no native human population. A) with some countries B) Europe and Australia put together C) from Europe or Australia D) than Europe or Australia
Answer» Correct option is D) than Europe or Australia

Discussion

11.	________ growing awareness of social ills, the philosophers wrote increasingly more to warn people. A) A B) When a C) Because her D) Due to her
Answer» Correct option is D) Due to her

Discussion

12.	Overexposure to the sun ________ . A) more than damage to the skin B) damage to the skin C) can produce damage to the skin D) more damage to the skin
Answer» Correct option is C) can produce damage to the skin

Discussion

13.	Philosophers are not sure _______ . A) how can universal peace be secured B) universal peace can be C) precisely how universal peace can be secured D) can universal peace be secured
Answer» Correct option is C) precisely how universal peace can be secured

Discussion

14.	The Social Security Act of 1935 was ________ . A) written to insure workers against unemployment B) it insured workers against unemployment C) written that it insured workers against unemployment D) workers against unemployment
Answer» Correct option is A) written to insure workers against unemployment

Discussion

15.	Write the procedure on conducting the test on acid and leaf to know about the effect of acid in stomach.
Answer» Aim : To prove that effect of acid in the stomach. Apparatus and Chemicals : Leaves, vaseline, petroleum jelly, weak acid. Procedure : Let us take two similar green leaves from school garden. Apply petroleum jelly on one leaf and leave the other freely. Add 1 or 2 drops of weak acid on both the leaves. Let us observe for sometime. Observation : We find that the leaf applied with petroleum jelly has no change whereas, the leaf that has not applied with jelly is partly affected. Result : 1. This shows that the function of petroleum jelly can be compared to that of mucus lining in the stomach walls. 2. Mucus is secreted by some cells present in the walls of the stomach. It forms a thin lining on the walls of the stomach. 3. This counteracts the action of acid. 4. Hence, the stomach is protected from damage caused by the secretion of its own acid.

15.

Write the procedure on conducting the test on acid and leaf to know about the effect of acid in stomach.

Answer»

Aim : To prove that effect of acid in the stomach.

Apparatus and Chemicals : Leaves, vaseline, petroleum jelly, weak acid.

Procedure : Let us take two similar green leaves from school garden. Apply petroleum jelly on one leaf and leave the other freely. Add 1 or 2 drops of weak acid on both the leaves. Let us observe for sometime.

Observation : We find that the leaf applied with petroleum jelly has no change whereas, the leaf that has not applied with jelly is partly affected.

Result :

1. This shows that the function of petroleum jelly can be compared to that of mucus lining in the stomach walls.

2. Mucus is secreted by some cells present in the walls of the stomach. It forms a thin lining on the walls of the stomach.

3. This counteracts the action of acid.

4. Hence, the stomach is protected from damage caused by the secretion of its own acid.

Discussion

16.	What is “EDTA”?(a) Magnesium calcium edentate(b) Nitrogen phosphorus edentate(c) Sodium calcium edentate(d) Magnesium phosphorus edentate
Answer» Correct answer is (c) Sodium calcium edentate The explanation: A specific salt of EDTA, known as sodium calcium edetate, is used to bind metal ions in the practice of chelation therapy, e.g., for treating mercury and lead poisoning. It is used in a similar manner to remove excess iron from the body. EDTA is a chelating agent and a chelating agent is a substance whose molecules can form several bonds to a single metal ion. In other words, a chelating agent is a multidentate ligand.

Discussion

17.	Which of the following ion is required by the ribosomes?(a) H^+(b) Mg^2+(c) Mn^2+(d) Ca^2+
Answer» Right answer is (b) Mg^2+ Easiest explanation: Magnesium, serves as a structural component and is involved as a cofactor in many enzymatic reactions. Magnesium is a component of the chlorophyll structure. Magnesium is required to maintain ribosome integrity. Ribosomes specifically require Mg^2+ ions.

Discussion

18.	Which of the following can grow in absence of CO2 or carbon sources?(a) Autotrophs(b) Mixotrophs(c) Chemoautotrophs(d) Facultative autotrophs
Answer» Correct answer is (d) Facultative autotrophs Best explanation: Facultative autotrophs normally grow under autotrophic conditions; however, they can grow under heterotrophic conditions in the absence of CO2 and inorganic energy sources.

Discussion

19.	Which type of homebrewer is best for 8 ppm of dissolved oxygen in solution?(a) Siphon sprays(b) Whipping(c) Splashing and shaking(d) Pure air through a stone with an aquarium pump
Answer» The correct answer is (c) Splashing and shaking For explanation: Homebrewers have several aeration/oxygenation methods available to them: siphon sprays, whipping, splashing, shaking, pumping air through a stone with an aquarium pump, and injecting pure oxygen through a sintered stone. Pumping compressed air through a stone is not an efficient way to provide adequate levels of DO. Traditional splashing and shaking, although laborious, is fairly efficient at dissolving up to 8 ppm oxygen. To increase levels of oxygen, the carboy headspace can be purged with pure oxygen prior to shaking.

Discussion

20.	Sex of a child is determined by the father. How?
Answer» A child who inherits X chromosome from her father will be a girl and a child who inherits Y chromosome from his father will be a boy. Both the girl and the boy inherit only X choromosome from the mother. Therefore sex of a child is determined by the father.

Discussion

21.	Consider the following statements:Statement I: 1-butene on reaction with HBr in the presence of a peroxide, produces 1-bromobutane. Statement II: It involves the formation of a primary radical.Of these statements:(a) Both the statements are true and Statement It is the correct explanation of statement I.(b) Both the statements are true, but Statement II is not the correct explanation of Statement I(c) Statement I is true, but Statement II is false.(d) Statement I is false, but Statement II is true.
Answer» Answer (a) Both the statements are true and Statement It is the correct explanation of statement I.

Discussion

22.	The most stable canonical structure among these is32th
Answer» The correct answer is III Due to the presence of more \(\pi\) electrons and more resonance III is more stable than I and II

22.

The most stable canonical structure among these is32th

Answer»

The correct answer is III

Due to the presence of more \(\pi\) electrons and more resonance III is more stable than I and II

Discussion

23.	Consider the following statements:Statement I: The heat absorbed during the isothermal expansion of an ideal gas against vaccum is zero. Statement II: The volume occupited by the molecules of an ideal gas is zero.Of these statements:(a) Both the statements are true and Statement It is the correct explanation of statement I.(b) Both the statements are true, but Statement II is not the correct explanation of Statement I(c) Statement I is true, but Statement II is false.(d) Statement I is false, but Statement II is true.
Answer» Answer (c) Statement I is true, but Statement II is false

Discussion

24.	Which of the following statements is true about this molecule
Answer» The correct answer is b C1-C2 bond is shorter than C3-C4 bond

24.

Which of the following statements is true about this molecule

Answer»

The correct answer is b

C1-C2 bond is shorter than C3-C4 bond

Discussion

25.	The atomic weight of helium is 4 times of hydrogen its rate of diffusion as compared to hydrogen is
Answer» The correct answer is a \(\frac{r_1}{r_2}= \sqrt\frac{M_2}{M_1}\\\frac{r_1}{r_2} = \sqrt\frac{2x}{8x}\\\frac{r_1}{r_2}=\sqrt\frac{1}{4}\\\frac{r_1}{r_2}=\frac{1}{2}\) Hence rate of diffusion of hydrogen is 2 times of helium (i:e) r₂ = 2r₁

25.

The atomic weight of helium is 4 times of hydrogen its rate of diffusion as compared to hydrogen is

Answer»

The correct answer is a

\(\frac{r_1}{r_2}= \sqrt\frac{M_2}{M_1}\\\frac{r_1}{r_2} = \sqrt\frac{2x}{8x}\\\frac{r_1}{r_2}=\sqrt\frac{1}{4}\\\frac{r_1}{r_2}=\frac{1}{2}\)

Hence rate of diffusion of hydrogen is 2 times of helium (i:e) r₂ = 2r₁

Discussion

26.	The main factor(s) which affect corrosion is/are(a) position of metal in electrochemical series(b) presence of CO2 in water(c) Presence of impurities in metal(d) presence of protective coating
Answer» Answer (a,c,d) position of metal in electrochemical series, Presence of impurities in metal & presence of protective coating.

Discussion

27.	Choose the correct name for the formula, [Cr(NH3)4(OH)2]Br
Answer» The name of compound [Cr(NH₃)₄(OH)₂]Br is Tetraaminedihydoxochromium (I) Bromo

27.

Choose the correct name for the formula, [Cr(NH3)4(OH)2]Br

Answer»

The name of compound [Cr(NH₃)₄(OH)₂]Br is

Tetraaminedihydoxochromium (I) Bromo

Discussion

28.	CH3---CH==CH---CH3------->?Which of the follwing is product formed if reactants are 1-O3 and 2H2O and ZnA CH3CHO +CH3CHOB CH3CHO+HCHO
Answer» The correct answer is b Formaldehyde & Acetaldehyde Reductive ozonolysis When alkenes/alkynes react with ozone, C=C or C≡C are broken replaced by C=O. For example, when propene reacts with ozone followed by treatment with Zn/H₂O, it will form formaldehyde and acetaldehyde. CH3 - CH = CH₂ + O₃ → CH₃ - CHO + HCHO

28.

CH3---CH==CH---CH3------->?Which of the follwing is product formed if reactants are 1-O3 and 2H2O and ZnA CH3CHO +CH3CHOB CH3CHO+HCHO

Answer»

The correct answer is b

Formaldehyde & Acetaldehyde

Reductive ozonolysis

When alkenes/alkynes react with ozone, C=C or C≡C are broken replaced by C=O.
For example, when propene reacts with ozone followed by treatment with Zn/H₂O, it will form formaldehyde and acetaldehyde.

CH3 - CH = CH₂ + O₃ → CH₃ - CHO + HCHO

Discussion

29.	What of the following on reduction with LiAIH4 give Ethyl alcohol (C2H5OH)?(a) (CH3CO)2O(b) CH3COCl(c) CH3CONH2(d) CH3COOC2H5
Answer» Answer (a,d) (CH₃CO)₂O & CH₃COOC₂H₅

Discussion

30.	Why are carbon and its compounds used as fuels for most applications
Answer» Carbon and its compounds are used as fuels because they burn in the air releasing a large amount of heat energy. C+O₂-->CO₂+Heat CH₄+2CO₂--->CO₂+ H₂O+Heat

30.

Why are carbon and its compounds used as fuels for most applications

Answer»

Carbon and its compounds are used as fuels because they burn in the air releasing a large amount of heat energy.

C+O₂-->CO₂+Heat

CH₄+2CO₂--->CO₂+ H₂O+Heat

Discussion

31.	Which is strongest base among the following.(a) SO2-4 (b) – HCO-3(c) CO2-3 (d) – NO-3
Answer» CO^2-₃ is strongest base.

Discussion

32.	Among the following compounds. Which is acidic.(a) CH4(b) C2H6(c) C2H4 (d) C2H2
Answer» C₂H₂ is acidic

Discussion

33.	Which of the following molecules having sp2-hybridisation only(a) CH = C = O (b) CH2 = C = CH2(c) CH2 = CH – CHO (d) CH2 = CH CN
Answer» CH₂ = CH – CHO molecules having sp²-hybridisation only

Discussion

34.	What is the function of disengagement zone from the following?(a) Increase foaming(b) Maximize recirculation of bubbles(c) Increase volume to the reactor(d) Decrease volume to the reactor
Answer» Correct choice is (c) Increase volume to the reactor For explanation: The roles of the disengagement zone are to: ▪ add volume to the reactor, ▪ reduce foaming and ▪ minimise recirculation of bubbles through the down comer.

Discussion

35.	Which gas saturation is of great importance in clinical practice?(a) oxygen(b) carbon dioxide(c) hydrogen(d) nitrogen
Answer» The correct answer is (a) oxygen The explanation: In clinical practice, the percentage of oxygen saturation in the blood is of great importance. This saturation being a bio-constant is an indication of the performance of the most important cardio-respiratory functions. It is maintained at a fairly constant value to within a few percents in a healthy organism.

Discussion

36.	What volume of water should be mixed to produce 2M HCl (aq) from 50 ml 5M HCl (aq)?A. 62.5mlB. 75mlC. 100mlD. 125ml
Answer» `M_(1)V_(1)=M_(2)V_(2)` `5xx50=2xxV_(2)rArrV_(2)=125ml` `DeltaV=V_("water")=125-75ml`

Discussion

37.	Mass of 10 atoms of an element is `24xx10^(-23)` gm, then atomic mass of that element is:A. 6B. 14.45C. 24D. 12
Answer» M ass of `N_(A)` atoms `=(24xx10^(-23))/(10)xx6.022xx10^(23)=14.4 gm` Atomic mass =14.4

Discussion

38.	How many litre of `C_(7)H_(16)` will be required to react with 176 gm of oxygen. If density of `C_(7)H_(16)` will be required to react with 176 gm of oxygen. If density of `C^(7)H_(16)` is 0.8 gm/L?A. 62.5LB. 40LC. 50LD. 80L
Answer» `C_(7)H_(16)+11O_(2)rarr7CO_(2)+8H_(2)O` `(176)/(32)=5.5` `n_(C_(7)H_(15))"required"=(n_(O_(2)))/(11)=(5.5)/(11)=0.5` `d_(C_(7)H_(16))=(50)/(V lit)0.8rArrV=(50)/(0.8)=(500)/(8)=62.5` litre

Discussion

39.	Ratio of masses of `Na_(3)PO_(4)` and `Ca_(3)(PO_(4))_(2)` each containing 31gm of P is ________A. 0.8B. 0.529C. 1.05D. 0.43
Answer» `n_(p)=n_(Na_(3)PO_(4))xx1 n_(Na_(3)PO_(4))xx2xxn_(Ca_(3))(PO_(4))_(2)` `n_(p)=n_(Ca_(3))(PO_(4))_(2)xx2 (W_(Na_(3)PO_(4)))/(164)xx2xx(W_(Ca_(3))(PO_(4))_(2))/(310)` `(W_(Na_(3)PO_(4)))/(W_(Ca_(3))(PO_(4))_(2))=(2xx164)/(310)=(328)/(310)=1.058`

Discussion

40.	Molarity of aqueous glucose `(C_(6)H_(12)O)^(6)` will be, if mole fraction of glucose is 0.4.A. 10MB. 3.7MC. 0.4MD. 2M
Answer» `n_("glucose")=0.4rArrw_("glucose")=0.4xx180=72(M wt. C_(6)H_(12)O_(6)=180)` `n_(H_(2)O)=0.6rArrW_(H_(w)O)=0.6xx18=18.8` `W_("solution")=72+10.8=82.8gm` `d_("solution")=(82.8)/(V_("solution"))=2.07 gm//mlrArrV_("solution")=(82.8)/(2.07)=40ml` Molarity `rArrM=(0.4)/(40)xx1000=10M`

Discussion

41.	If 2M, 200ml HCl, 2M, 100ml `CaCl_(2)` and 5M, 200ml `AlCl_(3)` is mixed then final concentration of `Cl^(-)` will be:A. 2.5MB. 3MC. 3.5MD. 7.6M
Answer» `[Cl^(-)]=(M_(1)V_(1)+2M_(2)V_(2)+3M_(3)V_(3))/(V_(1)+V_(2)+V_(3))` `(2xx200+2xx2xx100+3xx5xx200)/(200+100+200)` `=(400+400+3000)/(500)=(3800)/(500)=7.6M`

Discussion

42.	What is meant by dispersal of seeds?
Answer» The dispersal of seeds refers to the movement of seeds to the distant places from the parent plants.

Discussion

43.	Which substance acts as hydrogen acceptor in plants when photolysis of water takes place?
Answer» NADP (Nicotinamide Adenine Dinucleotide Phosphate) acts as hydrogen acceptor in plants when photolysis of water takes place.

Discussion

44.	Which organisms are macroconsumers?
Answer» Organisms such as herbivores and carnivores are macro-consumers.

Discussion

45.	Which two algae are grown on large scale as source of good protein?
Answer» Chlorella and Spirulina are two algae which are grown on large scale as source of good protein.

Discussion

46.	Name the important steps in the process of decomposition.
Answer» The important steps in the process of decomposition are fragmentation, leaching, catabolism, humification and mineralization.

Discussion

47.	Where do endomycorrhizae grow?
Answer» Endomycorrhizae grow in between and within the cortical cells of the root.

Discussion

48.	Enlist the important ecological services.
Answer» Carbon dioxide fixation, carbon assimilation, release of oxygen and pollination are some of the important ecological services.

Discussion

49.	Biofertilizers.
Answer» Biofertilizers are fertilizers that are obtained from microbes like bacteria and fungi.

Discussion

50.	What is SCP?
Answer» SCP is single cell protein which denotes dead and dried cells of microbes such as bacteria, algae, moulds and yeasts.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

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If 2M, 200ml HCl, 2M, 100ml `CaCl_(2)` and 5M, 200ml `AlCl_(3)` is mixed then final concentration of `Cl^(-)` will be:A. 2.5MB. 3MC. 3.5MD. 7.6M

What is meant by dispersal of seeds?

Which substance acts as hydrogen acceptor in plants when photolysis of water takes place?

Which organisms are macroconsumers?

Which two algae are grown on large scale as source of good protein?

Name the important steps in the process of decomposition.

Where do endomycorrhizae grow?

Enlist the important ecological services.

Biofertilizers.

What is SCP?

CH3---CH==CH---CH3------->?Which of the follwing is product formed if reactants are 1-O3 and 2H2O and ZnA CH3CHO +CH3CHOB CH3CHO+HCHO