Friday, December 3, 2010

Engineering Entrance Tests Questions

Chemistry

1. The number of moles of solute present in 1000 ml of the water and aqueous solution are respectively called
 a. Morarity & Morality
b. Morality & Molarity
c. Normality & Molarity
d. Normality & Molality
Ans: B

2. Boltzmann constant with respect to gas constant is
 a. Gas constant for 100 molecules
b. Gas constant for 10 mole of gas
c. Gas constant for 1 mole only
d. Gas constant for 1 molecule only
Ans: D

3. When Fe(OH)3 sol is added to As2S3 sol, then
 a. a new solution is formed
b. an emulsion is formed
c. an zoetrope is formed
d. flocculation takes place
Ans: D

4. The number of significant digits in 0.00002 and 20,000 respectively are
 a. 1 and 5
b. 1 and 1
c. 5 and 1
d. 6 and 5
Ans: A

5. In fluorite structure, the arrangement of spheres is
 a. acc
b. hcc
c. hcp
d. ccp
Ans: D

6. 1 mole of hydrated CuSO4 contains
 a. 90 moles of water
b. 90 atoms of water
c. 90 g of water
d. 9 g of oxygen
Ans: C

7. During the extraction of Fe, slag obtained is
 a. FeO
b. FeSiO3
c. MgSiO3
d. CaSiO3
Ans: D

8. Acetaminophen is a
 a. analgesics
b. disinfectant
c. antipyretic
d. none of these
Ans: C

9. Joule - Thomson effect is zero in the case of
 a. Real gas
b. Permanent gas
c. Ideal gas
d. Non ideal gas
Ans: C

10. The enthalpies of elements in their standard states are taken as zero. Hence the enthalpy of formation of a compound
 a. should always be negative
b. should always be positive
c. will be equal to twice the energy of combustion
d. may be positive or negative
Ans: D

11. To a mixture of acetic acid and sodium acetate a further amount of sodium acetate is added. The pH of the mixture:
 a. increases
b. decreases
c. remains unchanged
d. not predictable
Ans: A

12. The product of atomic weight and specific heat for solid elements in k cal / mol is
 a. 6.4
b. 5
c. 7.2
d. 5.6
Ans: A

13. Water is a mixture of
 a. CO and H2
b. CO2 and H2O
c. CO and N2
d. CO, H2 and N2
Ans: A

14. Phorone is obtained by the condensation of
 a. 2 molecules of CH3-CHO
b. 2 molecules of CH3-CO-CH3
c. 3 molecules of CH3-CHO
d. 3 molecules of CH3-CO-CH3
Ans: D

15. The value of Van der Waals constant 'a' is the largest for
 a. O2
b. NH3
c. H2
d. N2
Ans: B

16. Proton is
 a. Alpha particle
b. Ionized hydrogen atom
c. Doubly ionized helium atom
d. Ionized hydrogen molecule
Ans: B

17. In square close packing the central sphere is in contact with ----- spheres in one layer
 a. 6
b. 12
c. 8
d. 4
Ans: D

18. The pH of an aqueous solution of CH3COONa will be
 a. 3
b. 7
c. 9
d. 14
Ans: C

19. GUN cotton contains
 a. glucose
b. pyrolyxin
c. α -amylose
d. cellulose trinitrate
Ans: D

20. The total energy of the electron in hydrogen atom is
 a. Less than zero
b. Equal to zero
c. Infinity
d. Greater than zero
Ans: A

21. For a reaction in equilibrium
 a. there is no volume change
b. the reaction has stopped completely
c. the rate of forward reaction is equal to the rate of backward reaction
d. the forward reaction is faster than the reverse reaction
Ans: C

22. In the metallurgy of iron, limestone is added to blast furnace, the calcium on ends up in:
 a. slag
b. gange
c. calcium carbonate
d. calcium oxide
Ans: A

23. When conc. HNO3 is heated with P2O5, it forms
 a. N2O
b. NO
c. NO2
d. N2O5
Ans: D

24. The first ionization potential will be maximum for
 a. lithium
b. hydrogen
c. uranium
d. iron
Ans: B

25. LEUCO compound havig highest Pkb value among the following is
 a. (CH3)3N
b. (CH3)2NH
c. CH3NH2
d. NH3
Ans: D

26. The rate of reaction is doubled for every 100 rise in temperature. The increase in reaction rate as a result of temperature rise from 100 to 1000 is:
 a. 112
b. 512
c. 400
d. 614
Ans: B

27. The shape of XeF2 molecule is
 a. tetrahedral
b. pyramidal
c. trigonal planar
d. linear
Ans: D

28. The number of ions formed when cupramonium sulphate dissolved in water is
 a. one
b. two
c. four
d. zero
Ans: B

29. TiCl4 is readily hydrolyzed into
 a. TiO2
b. Ti2O3
c. TiO
d. [Ti(OH2)]
Ans: A

30. The unit of specific conductivity is
 a. ohms cm-1
b. ohms cm-2
c. ohms-1 cm
d. ohms-1 cm-1
Ans: D

31. Heavy water is
 a. water containing sulphates of Ca and Mg
b. water containing heavy ions
c. water at 40C
d. D2O
Ans: D

32. The work done in changing one mole of water at 1000C to steam at 1000C and one atmospheric pressure is given by
 a. 310 J
b. 31 J
c. 1300 J
d. 3100 J
Ans: D

33. Potassium crystallizes in a body centered lattice. Hence the coordination number of potassium in potassium metal:
 a. zero
b. 8
c. 6
d. 4
Ans: B

34. Electron transfer chain reactions are observed in
 a. cellular respiration
b. glycolysis
c. digestion
d. all the above
Ans: A

35. HVZ reaction is not given by
 a. HCOOH
b. C6H5COOH
c. Cl3.C.COOH
d. all the above
Ans: D

36. Michalis Menten mechanism is related with
 a. thermodynamics of irreversible systems
b. fugacity
c. triple point
d. kinetic analysis of enzyme catalyzed reactions
Ans: D

37. The ionizing power of β-particle is ......... times more than that of α-particles
a. 10+2
b. 10-1
c. 10-2
d. 10-4
Ans: C

38. Iron is rendered passive when treated with:
 a. H2SO4
b. HCl
c. H3PO4
d. HNO3
Ans: D

39. The appropriate current in amp/sec necessary to produce O2 gas at the rate of 10-3 litre per second is
 a. 1.723
b. 0.1723
c. 17.23
d. 172.3
Ans: C

40. White phosphorous contains
 a. P2 molecules
b. P6 molecules
c. P4 molecules
d. P8 molecules
Ans: C

41. Out of the following the most acidic is
 a. As2O3
b. P2O3
c. Sb2O3
d. Bi2O3
Ans: B

42. Two electrons in an orbital are distinguished by
 a. Spin quantum number
b. Subsidiary quantum number
c. Magnetic quantum number
d. Principle quantum number
Ans: A

43. The number of gram atoms present in 22.4 g helium is
 a. 2
b. 2.1
c. 5.6
d. 11.2
Ans: C

44. Which of the following is a heterogeneous mixture?
 a. Sand and Sugar
b. Smoke
c. Sand & Salt
d. All the above
Ans: D

45. A chemical system is in equilibrium. Addition of a catalyst would result in
 a. increase in the rate of forward reaction
b. increase in the rate of reverse reaction
c. add a new reaction path
d. increase the amount of heat evolved in the reaction
Ans: C

46. The shape of NH3 molecule is
 a. tetrahedral
b. pyramidal
c. trigonal planar
d. linear
Ans: B

47. Change in the internal energy of one mole of Argon during isothermal expansion is
 a. 100 cals
b. 140 cals
c. 1200 cals
d. zero
Ans: D

48. Isotonic solutions have same
 a. Vapour pressure
b. Molality
c. Molarity
d. Mole fraction
Ans: C

49. The hydrolysis of methyl formate in acid solutions has rate expression rate = k[HCOOCH3][H+], the balanced equation being HCOOCH3 + H2O ¾¾¾¾® HCOOH + CH3OH The rate law contains [H+] through the balanced equation does not contain [H+] because:
 a. more for convenience to express the rate law
b. H+ ion is a catalyst
c. H+ is an important constituent of any reaction
d. all acids contain H+ ions
Ans: B

50. Magnetic quantum number designates
 a. Size of orbitals
b. Spatial orientation of orbitals
c. Spin angular momentum
d. Orbital angular momentum
Ans: B

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CURRENT AFFAIRS PREPARATION PLAN

“Current Affairs” and “General Knowledge” cover many topics like from economy to sports or education to politics, or even technology to automobiles. In every second some issues are happening around the world in these sectors, and to accumulate the excerpt of some highlighted news, and memorize it is a good plan to prepare current affairs and GK.

Some Important Tips to Follow:

Read Newspapers regularly

We all know that “Old is Gold”, same thing applies here too. We need to make a habit of reading newspapers regularly. I’ll suggest you to read more than one newspaper. It will be better if you read one newspaper of your mother language, and other of English. Some useful newspapers are “The Times of India”, “The Hindu”, “The Telegraph” etc. You need to start this habit at least 6 months before the actual exam that will help you to get access to all the important events of that period of time.

You need to keep an eye on what’s happening around you in your country and world as well. Trust me guys, you will surely find it interesting after several days. We all know that staying updated is always a good idea, as it will stand you apart from the rest.

Read Magazines thoroughly

This is another great option to prepare the subject we are talking about. There are many leading magazines that focus on current affairs and General Knowledge. You need to buy it from your local magazine seller, and start reading it thoroughly. These magazines beautifully categorize the articles with its genres to make it interesting to read on. Some of the useful magazines are Pratiyogita Darpan andManorma.

Try to read some business magazines and sports magazines too along with a general magazine. This will increase your chances of cracking the competitive exams with ease. Some useful business magazines areBusiness Today, Business Line etc.

Follow News Channels

You will need to follow news channels at least once a day. Now most of the leading news channels are active for 24*7. You need to pick up a suitable time for yourself to watch any favorite news channel of yours. You can watch ABP News, NDTV, Times Now, ET Now, Zee News etc. Try to go through all the breaking and highlighted news, and make it a habit.

I know that watching news channels for long will bore you, so I’ll suggest you to allocate only 30 minutes for it in a whole day. All the leading ones shows the glimpses of all important events of the day quite frequently, so 30 minutes will be enough for you to boost up your current affairs and GK knowledge.

Maintain a Diary

My teacher used to tell me that whenever you learn something try to write it down in your diary, as it will help you to memorize it in a better manner. He is so right, as this method helped me a lot to score good marks in every exam that I appeared for. As I already mentioned before that a lot of events are occurring in the country and around the world, so it is easily understandable that it is not easy to remember everything. It’s always a superb idea to maintain a diary of current events.

You need to update this diary on a daily basis with all the events that you consider as important ones. This diary will become quite useful for the revision part, as it will provide you information about all the important events at a place. You should keep revising the diary frequently, as it will help you to memorize important names, dates, awards etc.

Channelize your Preparation Accordingly

All the competitive exams are not same, as all of them have different pattern, even when it comes to the same topic as ‘Current Affairs’ or ‘GK’. For example for civil services exam, you need to give importance on events of National value. On the other scenario, in matter of bank job exam, the focus should be on the news on banking sectors, and economic and business news.

Thus I’ll suggest you to prepare as per the exams you are appearing for, as channelizing your preparation according to the pattern of the exam will accelerate your chance of getting selected.

Use Internet Resources

“Google, YouTube and Wikipedia are my favorite teachers’; one of my friends told me this once. This is quite true indeed, so you should use all the available online resources to study current affairs and GK for exams. For example this blog is all about “Current Affairs”, so you can check this blog regularly by subscribing to us (check the sidebar for subscription options). You can actively take part some forums that are focusing on current events. The good part is you can follow the websites of all leadingnewspapers online if you don’t have enough time to read newspapers.

Use Social Networking Sites for Good

Believe me or not you can surely use social networking sites to your benefits. Especially to prepare current affairs and General knowledge Facebook, Twitter, LinkedIn and StumbleUpon may help you a lot. You can join some Facebook pages, or follow some twitter accounts that are related to current affairs. You can join our Facebook Page too for this matter, or connect with me at LinkedIn or circle me in Google Plus for all the information on recent happenings to boost up your General Knowledgeability.

Give Priority to your Strength

We usually find difficulties when we try to learn everything at once. In that process basically we study a lot, but remember a little. We need to first select our strength areas for our preparation. Try to givepriority to your strength areas. It may be Sports, economy, Government Affairs or technology. Suppose you are applying for Bank exams, then you should prepare industry related news. Along with that you may pick any 2-3 areas of your strength like sports or technology. You need to prepare these sections to the utmost level. I can assure you that these strategies will help you to score much better in Current Affairs section.

Participate in Online Quizzes

You should participate in some free quizzes that are available online to evaluate yourself. For this matter you can easily access our “Quiz Section”. This will give you proper idea whether you are ready for the big exam day or not. As an added factor it will also provide you confidence i.e. very much essential. You can download Monthly-wise current affairs questions from Here.