Saved Bookmarks
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.
| 21201. |
Calculate the osmotic pressure in pascals exerted by a solution prepared by dissolving `1.0g` of polymer of molar mass `185,000` in `450mL` of water at `37^(@)C`. |
|
Answer» Correct Answer - `30.96 Pa` `W_(2)=1.0g, Mw_(2)=185000g mol^(-1)` `T=37^(@)C=37+273=310K` `R=8.314 K Pa L K ^(-1) mol^(-1)` `=8.314xx10^(3) Pa L K^(-1)mol^(-1)` `V=450mL=0.450 L,` osmotic pressure `(pi)=?` `n_(2)=(W_(2))/(Mw_(2))=(1.0g)/(185,000g mol^(-1))=(1)/(185000)mol` Applying the formula , we get `pi=MRT=(n_(2))/(V(i n L))xxRT` `=(1)/(185000xx0.450L)xx8.31410^(3)Pa L K^(-1)mol^(-1)xx310K` ltbr. `=30.96Pa` |
|
| 21202. |
Calculate the `(a)` molality, `(b)` molartiy, and `(c)` mole fraction of `KI` if the density of `20% (` mass `//` mass `)` aqueous `KI` is `1.202 g m L^(-1)`. |
|
Answer» Correct Answer - `a. 1.5 mol kg^(-1)` `b. 1.448M` `c. 0.0263` `W_(2)=20g,W_(sol)=100g` `W_(1)=100-20=80g` `m=(W_(2)xx1000)/(Mw_(2)xxW_(1))=(20xx1000)/(166xx80)=1.5mol Kg^(-1)` `b.` `Mw_(2)` of `Kl=39+127=166g mol^(-1)` `M+(% by mass xx10xxd_(sol))/(Mw_(2))=(20xx10xx1.202)/(166)` `=1.448M` `c.` `CHMi_(2)=(n_(2))/(n_(1)+n_(2))=(W_(2)//Mw_(2))/(W_(1)//Mw_(1)+W_(2)//Mw_(2))` `(20//166)/(80//18+20//166)` `=(0.12)/(4.44+0.12)=(0.12)/(4.56)=0.0263` |
|
| 21203. |
Discuss some of the institutional weaknesses in Indian agriculture. |
|
Answer» 1. Limited lending to the weaker section, 2. Too much formalities Some of the institutional weaknesses in Indian agriculture are as follows: ... Indian agricultural credit system is suffering from the problems of subsidised interest rates, poor recovery of loans, high intermediation costs of cooperatives and commercial banks and debt write-offs. |
|
| 21204. |
In the covid 19 times many econmists |
|
Answer» Release the money supply |
|
| 21205. |
If the resistance of a conductivity cell containing 0.01 mol/L KCl solution at 298 K is 1000 Ω, then the conductivity of the cell is [cell constant = 0.219 cm-1] |
|
Answer» Correct option is (c) As we know =1/resistance x cell constant = 0.219 cm-1 / 1000Ω = 2.19 x 10-4 5cm-1 Conductivity of 0.01 mol/ l kcl solution will be = 2.19 x 10-4 / 0.01 x 1000 = 21.9 S cm-1 |
|
| 21206. |
what one step can be taken through market to to reduce the consumodity of product harmful for health ? |
| Answer» imposition of high tax on such product by the government to make it costlier so that its demand comes down . Transformation comment . | |
| 21207. |
Estimate the value of Aggretate Demand in a economy if : (a) Autonomous Investment (I) = 100 crores (b) Marginal Propenstiy to save = 0.2 (c) Level of Income (Y) = 4,000 crores (d) Autonomous Consumption Expenditure(c) = 50 crores. OR In an economy C = 200 + 0.5 Y is the compsumption function where C is the consumption expenditure and Y is the national income . Investment expenditure is ₹ 400 crores . Is the economy in equilibrium at an income level ₹ 1,500 crores ? Jusifty your answer. |
|
Answer» Aggregate Demand (AD) function is given as: AD = C+ I AD = `{barC + b(Y)} + I` `barc = 50` (Given) b or MPC = 1 - MPS = 1 -0.2 = 0.8 Substituting the values of of `barC` and b in AD function, we get : AD = {50 + 0.8 ( 4,000)}+ 100 = ₹ 3,350 crores OR No, the Economy is not in a state of equilibrium at 1,500 crores Given : Consumption Function , C= 200 + 0.5 Y Investment Expenditure (I) = 400 crores At the equilibrium level Y =C + I Substituting the value from the question: Y= { 200 + 0.25Y} + 400 Y-0.5 Y = 600 0.5 Y = 600 Y = 600/ 0.5 = ₹ 1,200 crores. The equilibrium level of income is ₹ 1,200 crores. The given income ₹ crores is greater than equilibrium level of income . Therefore, the economy is not in equilibrium. |
|
| 21208. |
An addtion in the value can also take place even when the comodity does not go though any transformation Comment . |
| Answer» The given statement is correct it happens when a commodity is purchased for resale for example if a retailer sells TV for Rs. 12,000 after purchasing it for Rs. 11,000 then there is no transformation in TV yet value added is Rs. 1,000 | |
| 21209. |
Inventory is a ...................concept whereas the change in inventory is a ...................... concept. (Fill up the blank with correct alternative)a. stock, flow b. flow, stock c. stock, stock d. flow, flow |
|
Answer» Answer is: a. stock, flow |
|
| 21210. |
If in an economy the value of Net Factor Income from Abroad is Rs 200 crores and the value of Factor Income to Abroad is Rs 40 crores. Identify the value of Factor Income from Abroad. (Choose the correct alternative) a) Rs 200 crores b) Rs 160 crores c) Rs 240 crores d) Rs 180 crores |
|
Answer» Answer is: c) Rs 240 crores |
|
| 21211. |
if these is excess demand in the economy , it will generter employment opportuites in the economy .Comment. |
| Answer» the given statement is incorrect .Excess demand is a situation when there is no possibility of greater employment opportunities as economy , is already at full employment level. | |
| 21212. |
Identify the correct pair of formula from the following column I and II:Cloumn IColumn IIACurrent Account Surplusi.Receipts < PaymentsBCurrent Account Surplusii.Receipts > PaymentsCBalance Current Accountiii.Receipts ≠ PaymentsDCurrent Account Deficitiv.Receipts ≤ Paymentsa) A - i b) B - ii c) C - iii d) D - iv |
|
Answer» Answer is: b. B-ii |
|
| 21213. |
Supply of money refers to……................. a. currency held by the public b. currency held by Reserve Bank of India (RBI) c. currency held by the public and demand deposits with commercial banks d. currency held in the government account |
|
Answer» c. currency held by the public and demand deposits with commercial bank. |
|
| 21214. |
Cori cycle transfers |
|
Answer» (B) Lactate from muscles to liver |
|
| 21215. |
Effects produced by the ingestion of caustic substances or of irritant material a. Local toxicity b. Systemic toxicity c. Immediate toxicity d. Delayed toxicity |
|
Answer» a. Local toxicity |
|
| 21216. |
Consider the following statements: The Constitution of India provides that: 1. the Legislative Assembly of each State shall consist of not more than 450 members chosen by direct election from territorial constituencies in the State. 2. a person shall not be qualified to be chosen to fill a seat in the Legislative Assembly of a State if he/she is less than 25 years of age. Which of the statements given above is/are correct?(a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2 |
|
Answer» The correct option: (c) Both 1 and 2 |
|
| 21217. |
Which is the only place in India where Lord Brahma is worshipped? |
|
Answer» Correct answer is PUSHKAR |
|
| 21218. |
Who among the following is a legal advisor of the State Government as provided by the Constitution? (a) Public Prosecutor (b) Solicitor General (c) Advocate General (d) Attorney General |
|
Answer» (c) Advocate General |
|
| 21219. |
All of the following noble gases are present in the atmosphere, except1. Helium2. Xenon3. Argon 4. Radon |
|
Answer» Correct Answer - Option 4 : Radon The correct solution is Radon.
|
|
| 21220. |
The Legislative Council in a State can be created or disbanded by the:(a) State Legislative Assembly alone (b) Parliament alone (c) Parliament on recommendation of the State Legislature (d) President on recommendation of the Governor |
|
Answer» (c) Parliament on recommendation of the State Legislature |
|
| 21221. |
Choose the answer that you think correct according to the text:1. The main problems of India are(a) labour – saving devices(b) action and thought(c) Disease and poverty(d) hectic ways of the world2. The earliest influence of ancient Indian culture on South – East – Asia can be traced back to(a) 4th century A.D.(b) 5th century B.C.(c) 1st century A.D.(d) 9th century B.C.3. In the beginning, cultural relations between China and India were(a) Not very strong(b) mutually all assimilative(c) Pervasive and predominant(d) pervasive and weakening |
|
Answer» Correct option is 1 (c) Disease and poverty 2 (b) 5th century B.C 3 (a) Not very strong |
|
| 21222. |
Who among the following Sultana wall advised by Qazi Mughiauddin to act according to the laws of Shariat, but the Sultan rejected his advice? (a) Jalaluddin Khalji (b) Alauddin Khalji(c) Muhammad-bin-Tughluq (d) Firuz Tughluq |
|
Answer» (b) Alauddin Khalji |
|
| 21223. |
find the cube root of unity? |
|
Answer» omega , omega² and omega ³ Cube Root of Unity is refrred as the Cube Root of 1. It is defined as the number that can be raised to the power of 3 and result is 1. |
|
| 21224. |
The number of students in a college for Science stream and Arts stream are in the ratio of 4 : 5. In the next year, the percentage decrease in the Arts stream by 20% and percentage increase in the Science stream by 40%. In next year, find the ratio between the number of students of Science and Arts stream.1. 1 : 52. 35 : 163. 7 : 54. 4 : 75. 16 : 35 |
|
Answer» Correct Answer - Option 3 : 7 : 5 Given: Let number of students in Science and Arts stream be 4a and 5a respectively. Calculation: The number of students in Science stream in the next year = 4a × 140/100 = 28a/5 The number of students in Arts stream in the next year = 5a × 80/100 = 20a/5 ∴ Required ratio = (28a/5) : (20a/5) = 7 : 5 |
|
| 21225. |
Give a notes on unity of command |
|
Answer» Unity of command means that an employee should receive orders from one superior only. In other words, it means that no employee should be subjected to the order of more than one superior. Thus, it stands for single boss for each person or mono-command. |
|
| 21226. |
A current of 5 ampere is flowing through a wire of 60cm in length? This wire is kept perpendicular to a uniform magnetic field of 20 tesla? Calculate the value of force acting on this wire |
|
Answer» When a wire that carries a current I is placed in a magnetic field of intensity B it will experience a magnetic force which is given by the formula F = qvBsinθ where v is the velocity of charges, here v = l/t so the force on the wire will be F = q/tlBsinθ F= qvBsinθ since the wire is kept perpendicular to the field the angle will be 90⁰ the current flowing through the wire I = 5A length of the wire l = 60 cm = 0.60 m the magnetic field intensity B = 20T substituting the given values the force acting on the wire is F = 5 x 0.60 x 20 sin90 = 60N |
|
| 21227. |
During extraction of `Fe`, slag obtained isA. `FeO`B. `FeSiO_(3)`C. `MgSiO_(3)`D. `CaSiO_(3)` |
|
Answer» Correct Answer - D During extraction of `Fe` calcium silicate `(CaSiO_(3))` slag is obtained. |
|
| 21228. |
Formula of Felspar isA. `K_(2)O.A1_(2)O_(3).6SiO_(2)`B. `K_(2)O_(3).A1_(2)O_(3).6Si_(2).O_(2).2H_(2)O`C. `A1_(2)O_(3).2SiO_(2).2H_(2)O`D. `3MgO.4SiO_(2).H_(2)O` |
|
Answer» Correct Answer - A Feldspar is `K_(2)O.A1_(2)O_(3).6SiO_(2)` |
|
| 21229. |
The final step for the extraction of copper from copper pyrite in Bessemer converter involves the reactionA. `4Cu_(2)O+FeSrarr8Cu +FeSO_(4)`B. `Cu_(2)S+2Cu_(2)Orarr 6Cu+SO_(2)`C. `2Cuu_(2)O + FeSrarr 4Cu + Fe +SO_(2)`D. `Cu_(2)S+2FeOrarr 2Cu +2FeCo +SO_(2)` |
|
Answer» Correct Answer - B In Bessemer converter, copper sulphide is partially oxidised to cuprous oxide which further reacts with remaining copper sulphide to form copper and sulphur dioxide. `Cu_(2)S +2Cu_(2)O rarr 6Cu +SO_(2)` |
|
| 21230. |
Purpose of coke in the blast furnace isA. fuelB. alloying elementC. reducing agentD. both`(a)` and (c )` |
|
Answer» Correct Answer - D In blast furnace coke is used as uel as well as reducing agent |
|
| 21231. |
How is limestone used in `Fe` extraction?A. Oxidation of `Fe` oreB. Reduction of `Fe` oreC. Formation of slagD. Purification of `Fe`formed |
|
Answer» Correct Answer - C Limestone `(CaCO_(3))` is used for formation of slag in `Fe` extraction |
|
| 21232. |
Which one of the following ores is best concentrated by froth flotation method:A. GalenaB. CassiteriteC. MagnetiteD. Malachite |
|
Answer» Correct Answer - A Here only Galena is `PbS` (a sulphide ore). Cassiterite is `SnO_(2)`(oxide ore). Magnetic is `Fe_(3)O_(4)`(oxide ore) and Malachite is `Cu(OH)_(2).CuCO_(3)`(carbonate ore). The froth floatation process is used to concentrate sulphide ores, based on preferntial wetting properties with frothing agent and water. |
|
| 21233. |
Cassiterite is concentrated byA. LevigationB. Electromagnetic separationC. FloatationD. Liquefaction |
|
Answer» Correct Answer - B Cassiterite `SnCO_(2)` or tinstone-an ore of tin being non-magnetic can be separated from magnetic imputities like `Fe` and `Mn` from this methos. |
|
| 21234. |
An artificial satellite revolves round the earth with a relative velocity of 800 m/s. If acceleration due to gravity is 9 m/s2 and gravitational force is 3600 N, calculate its kinetic energy. |
|
Answer» Relatively velocity of satellite, v = 800 m/s Acceleration due to gravity, g = 9 m/s2 Gravitational force, m.g = 3600 N ∴ Mass, m = \(\cfrac{3600}g\) = \(\cfrac{3600}9\) = 400 kg. Kinetic energy = \(\cfrac12\) mv2 = \(\cfrac12\) x 400 x (800)2 J = 128 × 106 J or 128 MJ. |
|
| 21235. |
The heating and expanding of a gas is called (a) thermodynamic system (b) thermodynamic cycle (c) thermodynamic process (d) thermodynamic law. |
|
Answer» (b) thermodynamic cycle |
|
| 21236. |
Cassiterite is an ore of I... and is concentrated by II.... method . Here ,I and II refer toA. II ` to` levigation , I ` to` SnB. II ` to` froth floatation , I ` to` NiC. II ` to` electromagnetic separation , I ` to` SnD. II ` to` liquefaction , I ` to` Ni |
|
Answer» Correct Answer - C Cassiterite is an ore of Sn and is concentrated by electromagnetic separation method . |
|
| 21237. |
The value of one bar (in SI units) is equal to (a) 100 N/m2 (b) 1000 N/m2 (c) 1 × 104 N/m2 (d) 1 × 105 N/m2 (e) 1 × 106 N/m2 . |
|
Answer» (d) 1 × 105 N/m2 |
|
| 21238. |
The temperature at which the volume of a gas becomes zero is called (a) absolute scale of temperature (b) absolute zero temperature (c) absolute temperature (d) none of the above. |
|
Answer» (b) absolute zero temperature |
|
| 21239. |
In the isolation of metals, reaction proces susually results inA. metal sulphideB. metal carbonateC. metal hydroxideD. metal oxide |
|
Answer» Correct Answer - D Reduction process results in metal oxides. |
|
| 21240. |
Gravity separation method is based upon:A. difference in densities of ore particles and impuritiesB. difference in chemical properties of ore particles and impuritiesC. preferential washing of ores and gangue particlesD. None of the above |
|
Answer» Correct Answer - A The basic function of gravity separation method is the difference in densities of the ore and the gangue particles. |
|
| 21241. |
Three resistances of 2Ω each are connected to a 2V battery as shown in the front figure. Then ........ |
|
Answer» Given circuit resistance are parallel combination then \(\frac1R=\frac1R_1-\frac1R_2+\frac1R_2\) \(\frac1R=\frac12+\frac12+\frac12\) \(\frac1R=\frac32\) R = 2/3 We use V = iR i = V/R i = \(\frac{2\times3}2\) = 3 i = 3 ampeare Then I1 = 2A it divided two branches then I1 = 1 + 1 Then I2 = 2A |
|
| 21242. |
Gravity separation method is based upon:A. perferential washing of ores and gangue particles.B. difference in densities of ore particles and impurities.C. difference in chemical properaties of ore particles and impurities.D. none of these |
|
Answer» Correct Answer - B Hydraulic washing or gravity separation or levigation method is based on the difference in the densities of the gangue and ore particles. |
|
| 21243. |
Which of the following acts as oxidising agent in hydrogen-oxygen fuel cellA. `H_(2)`B. `O_(2)`C. KOHD. C |
|
Answer» Correct Answer - B Hydrogen oxygen fuel cell is an electrochemical cell that converts the chemical energy of hydrogen which is a fuel and oxygen which act as an oxidising agent into electricity through a pair of redox reaction. Thus, option (b) is correct. |
|
| 21244. |
Purest form of commercial iron is :A. SteelB. Wrought ironC. Grey cast ironD. White cast iron |
|
Answer» Correct Answer - B Grey cast iron and white cast iron contain 2.4 to 4.5% carbon together with some sulphur , phosphorus , silicon and manganese . Steel contain 0.4 to 1.5% impurities while wrought iron contain not more than 0.5% of carbon and other impurities . Therefore , wrought iron is the purest form of iron. |
|
| 21245. |
Calculate the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume at 27°C? (R = 2 cal `K^(-1) mol^(-1)`)A. 54 calB. - 600 calC. - 300 calD. 27 cal |
|
Answer» Correct Answer - C Given `T=27^(@)C=300K` `R=2calK^(-1)mol^(-1)` Reaction for combustion of carbon monoxide is given as: `CO(g)+1/2O_(2)(g)toCO_(2)(g)` `thereforeDeltan_(g)=1-15=-1/2` Now, the difference between heat of combustion of carbon monoxide gas at constant pressure and at constant volume is given by `DeltaH-DeltaU=Deltan_(g)RT` `thereforeDeltaH-DeltaU=-1/2xx2xx300=-300 cal` |
|
| 21246. |
Which of the following ore does not represent the ore of iron?A. HaemititeB. MagnetiteC. CassiteriteD. Limonite |
|
Answer» Correct Answer - C Cassiterite `(SnO_(2))`, Magnetite `(FE_(3)O_(4))`, Haematite `(Fe_(2)O_(3)`, Limonite `(Fe_(2)O_(3).3H_(2)O)`. |
|
| 21247. |
Which of the following is/are diamagnetic in nature ?A. `N_(2)`B. `C_(2)`C. `B_(2)`D. `O_(2)^(2+)` |
|
Answer» Correct Answer - A::B::D Which of the following ……………. `B_(2)` is paramagnetic `sigma1s^(2), sigma overset(.)(1)s^(2), sigma2s^(2), sigma overset(.)(2)s^(2) pi 2px^(1) = pi2py^(1)` |
|
| 21248. |
The ore having two different metal atoms isA. Copper pyritesB. haematiteC. MagnetiteD. Calamine |
|
Answer» Correct Answer - A `Cu Fe S_(2)` |
|
| 21249. |
Which of the following is not a mineral of iron?A. HaematiteB. MagnesiteC. MagneticD. Siderite |
|
Answer» Correct Answer - B Magnesite -`MgCO_(3)` . It is a mineral of magnesium |
|
| 21250. |
Azurite is an ore ofA. `Ag`B. `Cu`C. `Pt`D. `Au` |
|
Answer» Correct Answer - B Azurite `Cu(OH)_(2).2CuCO_(3)` |
|