Wipro Technologies Limited : Campus Recruitment Model Paper

Wipro Technologies Limited

Campus Recruitment Model Paper

1. If the sum of the roots of the equation ax2 + bx + c=0 is equal to the sum of the squares of their reciprocals then a/c, b/a, c/b are in

• AP
• GP
• HP
• None of these

2. The mass number of a nucleus is

• Always less than its atomic number
• Always more than its atomic number
• Sometimes more than and sometimes equal to its atomic number
• None of the above

3. A certain radioactive element A, has a half life = t seconds.In (t/2) seconds the fraction of the initial quantity of the element so far decayed is nearly

• 29%
• 15%
• 10%
• 45%

4. Which of the following plots would be a straight line ?

• Logarithm of decay rate against logarithm of time
• Logarithm of decay rate against logarithm of number of decaying nuclei
• Decay rate against time
• Number of decaying nuclei against time

5. When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts

• In the backward direction on the front wheel and in the forward direction on the rear wheel.
• In the forward direction on the front wheel and in the backward direction on the rear wheel.
• In the backward direction on both the front and rear wheels.
• In the backward direction on both the front and rear wheels.

6. A man speaks the truth 3 out of 4 times. He throws a die and reports it to be a 6. What is the probability of it being a 6?

• 3/8
• 5/8
• 3/4
• None of the above

7. If cos2A + cos2B + cos2C = 1 then ABC is a

• Right angle triangle
• Equilateral triangle
• All the angles are acute
• None of these

8. Image of point (3,Cool in the line x + 3y = 7 is

• (-1,-4)
• (-1,4)
• (2,-4)
• (-2,-4)

9. A radioactive element x has an atomic number of 100.It decays directly into an element y which decays directly into element z. In both processes a charged particle is emitted. Which of the following statements would be true?

• y has an atomic number of 102
• y has an atomic number of 101
• z has an atomic number of 100
• z has an atomic number of 101

10. The maximum KE of the photo-electron emitted from a surface is dependent on

• The intensity of incident radiation
• The potential of the collector electrode
• The frequency of incident radiation
• The angle of incidence of radiation of the surface

11. Which of the following is not an essential condition for interference

• The two interfering waves must be propagated in almost the same direction or the two interfering waves must intersect at a very small angle
• The waves must have the same time period and wavelength
• Amplitude of the two waves should be the same
• The interfering beams of light must originate from the same source

12. In a balanced chemical equation 

• Atoms are conserved
• Molecules are conserved
• Moles are conserved
• Reactant and product molecules are preserved

13. An electron emits energy

• Because its in orbit
• When it jumps from one energy level to another
• Electrons are attracted towards the nucleus
• The electrostatic force is insufficient to hold the electrons in orbits

14. How many bonds are present in CO2 molecule?

• 1
• 2
• 0
• 4

15. When X-Ray photons collide with electrons

• They slow down
• Their mass increases
• Their wave length increases
• Their energy decreases

16. How many grams of NaOH will react with 0.2 equivalent of HCl?

• 0.59
• 0.285
• 1.18
• none of these

17. Which of the following is least acidic

• Ortho-cresol
• Para-cresol
• Phenol
• Meta-cresol

18. In Reimer-Tiemann's reaction, the reaction intermediate is

• Carbene
• Dichloro carbene
• Carbonion
• Carbonium ion

19. The most abundant element in the universe is

• Hydrogen
• Helium
• Oxygen
• Silicon

20.A catalyst

• always slows down the reaction
• always starts a reaction that would not have occurred at all otherwise
• causes changes in the rate of the reaction
• changes the quantities of the products formed

21.The rate of the first order reaction depends on the

• Concentration of the reactant
• Concentration of the product
• Time
• Temperature

22. Which of the following is most acidic?

• C2H5OH
• CH3CHOHCH3
• Ethanol
• CH3OH

23. Integrate 3x + 5 / (x3-x2-x+1)

• 1/2 log | (x+1)/(x-1) | - 4/(x-1)
• log |2+tanx|
• -(1+logx)/x
• 2 log|(tanx)/(tanx+2)

24. If y=cos-1(cosx + 4sinx)/(17)1/2, then dy/dx is

• 0
• 1
• -1
•  none of these

25. If the sum of n terms of two series of A.P are in the ratio 5n+4:9n+6. Find the ratio of their 13th terms

• 129/231
• 1/2
• 23/15
• None of the above