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.
| 12601. |
Which is the false statement about wrought iron. It has A. High resistance to rusting and corrosion B. High ductility C. Ability of hold protective coating D. Uniform strength in all directions. |
|
Answer» D. Uniform strength in all directions. |
|
| 12602. |
Cupola produces following material A. Cast iron 15 B. Pig iron C. Wrought iron D. Malleable iron |
|
Answer» A. Cast iron |
|
| 12603. |
Nodular iron has A. High machinability B. Low melting point C. High tensile strength D. All the mentioned. |
|
Answer» D. All the mentioned. |
|
| 12604. |
The tensile strength of wrought iron is maximum A. Along the lines of slag distribution B. Perpendicular to lines of slag distributionC. Uniform in all directions D. Unpredictable |
|
Answer» A. Along the lines of slag distribution |
|
| 12605. |
Which of the following has maximum dipole moment ?(a) CH3Cl(b) CH2Cl2(c) CHCl3(d) CCl4 |
|
Answer» CHCl3 has maximum dipole moment. |
|
| 12606. |
During prepartion of wrought iron, CO and `SO_(2)` formed escape whereas ________ to form slag.A. MnO and `SiO_(2)` combineB. Mn and Si combineC. Mg and Si combineD. MgO and `SiO_(2) ` combine |
|
Answer» Correct Answer - A Flux |
|
| 12607. |
The stablest free radical among the following is :A. `CH_(3)overset(.)CH_(2)`B. `CH_(3)-overset(.)CH_(2)-CH_(3)`C. `CH_(3)-CH_(2)-overset(.)CH_(2)`D. `C_(6)H_(5)-overset(.)CH_2-CH_(3)` |
| Answer» Correct Answer - D | |
| 12608. |
What is a shadow? |
|
Answer» Shadows are made by blocking light. Light rays travel from a source in straight lines. If an opaque (solid) object gets in the way, it stops light rays from traveling through it. This results in an area of darkness appearing behind the object. The dark area is called a shadow. The size and shape of a shadow depend on the position and size of the light source compared to the object. |
|
| 12609. |
The molality of a sulphuric acid aqueous solution in which the mole fraction of water is 0.85 isA. 9.8B. 10.58C. 6.5D. 11.25 |
|
Answer» Correct Answer - A `(X_(H_(2)SO_(4)))/(X_(H_(2)O)) = (0.15)/(0.85) = (n_(H_(2)SO_(4)))/(n_(H_(2)O))` `(n_(H_(2)SO_(4)))/(n_(H_(2)O)) = (0.15)/(0.85 xx 18)` Molality `= (0.15 xx 1000)/(0.85 xx 18) = 9.8 M` |
|
| 12610. |
Which of the following pair has same structure but different hybridisation ?A. `I_(3)^(-)` & `Icl_(2)^(-)`B. `H_(2)O " & " Ocl_(2)`C. `NO_(2)^(-) " & " OF_(2)`D. `ICl_(4)^(-) " & " XeF_(4)` |
|
Answer» Correct Answer - C `NO_(2)^(-) rarr sp^(2)` Bent shape `OF_(2) rarr sp^(3)` Bent shape |
|
| 12611. |
The `O^(18)` -labelled ester ` CH_(3)-overset(O) overset(||)C-overset(18)OC_(2)H_(5)` is hydrolyzed with aqueous `H_(2)SO_(4)` . The products will be :-A. `CH_(3)-overset(O)overset(||)C-overset(18)(O)H and C_(2)H_(5)OH`B. `CH_(3)-overset(O)overset(||)C-OH and C_(2)H_(5)overset(18)OH`C. `CH_(3)-overset(O)overset(||)C-OH and C_(2)H_(5)OH`D. `CH_(3)-overset(O)overset(||)C-overset(18)(O)H and C_(2)H_(5)overset(18)(O)H` |
|
Answer» Correct Answer - B `CH_(3)-overset(O)overset(||)C-overset(18)O-C_(2)H_(5) overset(H^(o+)//H_(2)O)to CH_(3)-overset(O)overset(||)C-OH+C_(2)H_(5)-overset(18)(O)H` |
|
| 12612. |
Consider the salt `K_(x) H_(y) (C_(2)O_(4))_(z).2H_(2)O`. The relationship between x,y and z isA. x + y - z = 0B. x + y + z = 0C. x + y = 2zD. None of these |
|
Answer» Correct Answer - C `K_(x)H_(y) (C_(2) O_(4))_(z). 2H_(2)O` x = 1, y = 1, z = 1 `x + y = 2` `x + y = 2z` |
|
| 12613. |
The densities of two gases are in the ratio of `1 : 16`. The ratio of their rates of diffusion isA. `16:1`B. `4:1`C. `1:4`D. `1:16` |
|
Answer» Correct Answer - B `(r_(1))/(r_(2))=sqrt((d_(2))/(d_(1)))=sqrt((16)/(1))` `=4:1` |
|
| 12614. |
The correct order of decreasing third ionisation enthalpy of Ti, V, Cr, Mn is :A. `Mn gt Cr gt V gt Ti`B. `Ti gt V gt Cr gt Mn`C. `Cr gt Mn gt V gt Ti`D. `V gt Mn gt Cr gt Ti` |
|
Answer» Correct Answer - A `Ti lt V lt V lt Ti` `3d^(2) 3d^(3)3d^(4) 3d^(5)` |
|
| 12615. |
The length of simple pendulum executing SHM is increased by `69%` The percentage increase in the time period of the pendulum isA. `30%`B. `11%`C. `21%`D. `42%` |
|
Answer» Correct Answer - A `(T)/(T)=sqrt((169)/(100)), T=(13)/(10)T` `((T)/(T)-1)xx100%=((13)/(10)-1)xx100%=30%` |
|
| 12616. |
What is the etiological agent and the main manifestations of cholera? |
|
Answer» Cholera is a bacterial disease caused by the Vibrio cholerae. The disease is transmitted by fecal-oral route and the main mode of transmission is ingestion of contaminated water or food. It is most prevalent in places that lack adequate sanitary conditions. Inside the human gut the cholera vibrion releases toxins called enterotoxins. The infection can cause intense diarrhea, vomiting, dehydration and even death in more severe cases. |
|
| 12617. |
Are all pneumonias caused by bacteria? |
|
Answer» Pneumonia is the generic name of inflammation of the lungs. Besides bacterial pneumonias, there are pneumonias caused by virus, fungi, toxic pneumonias, etc. |
|
| 12618. |
What is Hansen’s disease (etiological agent, mode of transmission, clinical manifestations and prevention)? |
|
Answer» The etiological agent of Hansen’s disease is bacteria called Mycobacterium leprae. The mode of transmission is not yet totally known but it is believed that respiratory secretions and saliva drops can spread the disease. Hansen’s disease is a chronic disease (slow progression) that generally attacks the skin and the peripheral nerves although other areas of the body can be affected. In the skin nodules, reddish spots, thickening of the dermis and lack of sensitivity appear; the mucosae, especially the nasal mucosa, may be injured and also the viscera may be affected. The main form of prevention is information, since there is available treatment; infected people should, as soon as possible, look for health services for evaluation and treatment of the disease. In the past Hansen’s disease was called leprosy. |
|
| 12619. |
My friend loves to talk to people and tell them what he thinks. He is ______. A) ugly B) talkative C) strong D) sad |
|
Answer» Correct option is B) talkative |
|
| 12620. |
My best friend, Nick Palacio, loves scuba diving. Identify the phrase used in this sentence.a. Gerund Phraseb. Infinitive Phrasec. Appositive Phrased. Absolute Phrase |
|
Answer» c. Appositive Phrase My best friend, Nick Palacio, loves scuba diving is Appositive Phrase. |
|
| 12621. |
Read the following passage. We visited the beach called Elephant beach. To our amazement, we saw some swimmers diving into the sea from the motor boats. They were dressed in a different way. They put masks on their faces and carried air cylinders on their backs. I asked Dad, “Why are the swimmers diving into the sea?” Dad replied, “They want to watch the coral reefs and beautiful coloured fishes and sea turtles. They stay for a long time beneath the sea and swim along with them. lt is called Scuba diving.” The Scuba diving filled my heart with a spirit of adventure. I wished 1 could do it. Now answer the following questions. 1) What is Scuba diving? 2) Why do swimmers dive into the sea? 3) Why do the swimmers carry air cylinders? 4) Name the place where the Scuba diving is done. 5) Can you name two adventurous acts? |
|
Answer» 1) Diving deep into the sea and spending time watching the sea animals is called Scuba diving. 2) They want to watch the coral reefs and beautiful coloured fishes and sea turtles. 3) Because they stay for a long time under the sea and need air to breathe. 4) Elephant beach 5) Trekking, mountaineering, surfing on the sea. |
|
| 12622. |
Which is the coordination number in both hep and ccp arrangements? (a) 12 (b) 6 (c) 4 (d) 8 |
|
Answer» 12 is the coordination number in both hep and ccp arrangements. |
|
| 12623. |
His aunt died leaving him a small ________. A) heritage B) dowry C) portion D) grant E) legacy |
|
Answer» Correct option is A) heritage |
|
| 12624. |
His parents died when he was young so he was ________ by his aunt. A) brought out B) grown up C) brought up D) grown |
|
Answer» Correct option is C) brought up c- brought up ,it is the correct answer I think it is grownup |
|
| 12625. |
He has spent a large ________ of money on his new house. A) deal B) amount C) number D) piece |
|
Answer» Correct option is B) amount B) amount is the correct answer The correct answer is B) Amount |
|
| 12626. |
The sailor who discovered North America (A) Vasco da Gama (B) Megallan (C) Christopher Columbus |
|
Answer» Correct option (C) Christopher Columbus |
|
| 12627. |
He has spent a large ________ of money on his new house. A) deal B) amount C) number D) place |
|
Answer» Correct option is B) amount |
|
| 12628. |
America ________ by Christopher Columbus in 1492. A) was here B) found C) was discovered D) had ships |
|
Answer» Correct option is C) was discovered |
|
| 12629. |
Helen has answered ________ questions. A) the more B) very much C) any D) a few |
|
Answer» Correct option is D) a few |
|
| 12630. |
Helen has got only ______ money. A) any B) a little C) no D) few |
|
Answer» Correct option is B) a little |
|
| 12631. |
Platinum crystallize in a face centered cube crystal with a unit cell length of `3.9231 Å`. The density and atomic radius of platinum are respectively: [Atomic mass of Pt = 195]A. `45.25 g cm^(-3), 2.516 Å`B. `21.86 g cm^(-3), 1.387 Å`C. `29.46 g cm^(-3), 1.48 Å`D. None of these |
|
Answer» Correct Answer - B Density =`(ZxxM)/(N_Axxa^3)=(4xx195)/(6.02xx10^23xx(3.9231xx10^(-8))^3) =21.86 g//cm^3` for f c c lattice , 4r=`asqrt2` so, `r=(asqrt2)/4=(3.921sqrt2)/4Å` =1.387 Å |
|
| 12632. |
Helen has answered ________ questions. A) the more B) very muchC) any D) a few |
|
Answer» Correct option is D) a few |
|
| 12633. |
A reactor is supplied with C6H12O6 and the following reactions occur C6H12O6 -> 2C2H5OH + 2CO2 and C6H12O6 –> 2C2H3CO2H + 2H2O, 360 grams of pure glucose is supplied and 44 grams of CO2 was produced, what 90 grams of glucose left unreacted, how many grams of water was produced?(a) 9(b) 18(c) 36(d) 54 |
|
Answer» Correct choice is (a) 9 To elaborate: Weight of glucose reacted in first reaction = ½*(66/44)*180 = 135 grams => Weight of glucose reacted in second reaction = 360 – 180 – 135 = 45 grams, => moles of water produced = 2*(45/180)*18 = 9 grams. |
|
| 12634. |
A reactor is supplied with 15 moles of C, and it undergoes following reactions C + 0.5O2 -> CO and C + O2 -> CO2, if 8 moles of CO2 was produced and 3 moles of C remains unreacted, what are the number of moles of CO produced?(a) 1(b) 2(c) 3(d) 4 |
|
Answer» Right choice is (d) 4 Easy explanation: Extent of second reaction = (8 – 0)/1 = 8, => moles of C reacted in second reaction = 8*1 = 8, => moles of C reacted in first reaction = 15 – 8 – 3 = 4, => extent of first reaction = (0 – 4)/(-1) = 4, => moles of CO produced = 4*1 = 4. |
|
| 12635. |
A reactor is supplied with 20 moles of C, and it undergoes following reactions C + 0.5O2 -> CO and C + O2 -> CO2, if 10 moles of CO2 was produced and 5 moles of C remains unreacted, what are the number of moles of CO produced?(a) 1(b) 3(c) 5(d) 7 |
|
Answer» Right option is (c) 5 The best explanation: Extent of second reaction = (10 – 0)/1 = 10, => moles of C reacted in second reaction = 10*1 = 10, => moles of C reacted in first reaction = 20 – 10 – 5 = 5, => extent of first reaction = (0 – 5)/(-1) = 5, => moles of CO produced = 5*1 = 5. |
|
| 12636. |
The flow in rate of A is 5 mole/s, it undergoes a reaction A -> 2B, what are the moles of B that comes out after 5 seconds?(a) 5(b) 10(c) 25(d) 50 |
|
Answer» Right answer is (d) 50 For explanation I would say: Moles of B = 5*5*2 = 50. |
|
| 12637. |
There were 10 moles of a substance present initially in a system, 5 moles were added to it and a reaction occurred so that its moles are reduced by 20%, what are the final moles of a substance in the system?(a) 10(b) 12(c) 15(d) 18 |
|
Answer» Correct option is (b) 12 Easiest explanation: Final moles of substance = (10 + 5)*80/100 = 12. |
|
| 12638. |
There were 15 moles of a substance present initially in a system, 25 moles were added to it and a reaction occurred so that its moles are reduced by 50%, what are the final moles of a substance in the system?(a) 10(b) 15(c) 20(d) 40 |
|
Answer» Right option is (c) 20 The best explanation: Final moles of substance = (15 + 25)*50/100 = 20. |
|
| 12639. |
The flow in rate of A and B are 5 mole/s and 10 mole/s respectively, which under goes reaction A + 2B -> 3C, what is the flow out rate of C?(a) 5 mole/s(b) 10 mole/s(c) 15 mole/s(d) 20 mole/s |
|
Answer» The correct option is (c) 15 mole/s Explanation: Rate of C = 3*5 = 15 mole/s. |
|
| 12640. |
10 moles of A were present in a system initially, and 12 moles of C are added to it, it undergoes the reaction 2A + 3C -> 2B, what are number of moles of B produced?(a) 4(b) 5(c) 8(d) 12 |
|
Answer» The correct answer is (c) 8 Best explanation: Moles of B = 2*4 = 8. |
|
| 12641. |
The flow in rate of A and B are 8 mole/s and 10 mole/s respectively, which under goes reaction 4A + 5B -> 3C, what is the flow out rate of C?(a) 4 mole/s(b) 6 mole/s(c) 8 mole/s(d) 10 mole/s |
|
Answer» The correct option is (b) 6 mole/s To explain: Flow out rate of C = 3*2 = 6 mole/s. |
|
| 12642. |
A reaction is A + 2B -> 3C, if 2 moles of A and 4 moles of B entered the system, what are the number of moles of C formed?(a) 2(b) 4(c) 6(d) 8 |
|
Answer» The correct choice is (c) 6 Explanation: Moles of C = 3*2 = 6. |
|
| 12643. |
8 moles of A were present in a system initially, and 24 moles of B are added to it, it undergoes the reaction 2A + 3B -> 4C + 5D, what are the number of moles of D produced?(a) 10(b) 20(c) 30(d) 40 |
|
Answer» Correct choice is (c) 30 Explanation: Moles of D = 5*4 = 20. |
|
| 12644. |
Heat of formations of A, B, C, and D, are 1 J, 2 J, 3 J, and 4 J respectively, what is the heat of reaction 3A + 4B -> 2C + D?(a) -1 J(b) 1 J(c) 3 J(d) 6 J |
|
Answer» Correct answer is (a) -1 J Explanation: Heat of reaction = 4 + 2*3 – 4*2 – 3*1 = -1 J. |
|
| 12645. |
10 moles of A were present in a system initially, and 8 moles of C are added to it, it undergoes the reaction 5A + 3C -> 4B, what are number of moles of B produced?(a) 4(b) 6(c) 8(d) 10 |
|
Answer» The correct choice is (c) 8 For explanation I would say: Moles of B = 4*2 = 8. |
|
| 12646. |
Heat of formations of A, B, C, and D, are 5 J, 8 J, 2 J, and 15 J respectively, what is the heat of reaction 3A + B -> 3C + 2D?(a) 9 J(b) 10 J(c) 13 J(d) 15 J |
|
Answer» Right choice is (c) 13 J For explanation: Heat of reaction = 2*15 + 3*2 – 8 – 3*5 = 13 J. |
|
| 12647. |
Heat of formations of A, B, C, and D, are 3 J, 5 J, 4 J, and 8 J respectively, what is the heat of reaction 2A + 2B -> 2C + D?(a) -5 J(b) 0(c) 5 J(d) 8 J |
|
Answer» Right option is (b) 0 The explanation: Heat of reaction = 8 + 2*4 – 2*5 – 2*3 = 0. |
|
| 12648. |
What is the heat of reaction if the heat of combustion of products is 10 J and heat of combustion of reactants is 5 J?(a) -5 J(b) 5 J(c) 10 J(d) Cannot be determined |
|
Answer» Right choice is (a) -5 J The explanation is: Heat of reaction = 5 – 10 = -5 J. |
|
| 12649. |
Heat of formations of A, B, C, and D, are 5 J, 10 J, 15 J, and 20 J respectively, what is the heat of reaction A + 4B -> 3C + D?(a) 10 J(b) 20 J(c) 35 J(d) 45 J |
|
Answer» The correct choice is (b) 20 J To explain: Heat of reaction = 20 + 3*15 – 4*10 – 5 = 20 J. |
|
| 12650. |
What is the heat of reaction if the heat of combustion of products is 10 J and heat of combustion of reactants is 15 J?(a) -5 J(b) 5 J(c) 10 J(d) Cannot say |
|
Answer» Correct option is (b) 5 J The best I can explain: Heat of reaction = 15 – 10 = 5 J. |
|