Wipro Placement Papers-2
.
- 1.
Find the Antonyms of the following words1.When a bicycle is in motion,the force of friction exerted by the ground on the two wheels is such that it acts
- A.
In the backward direction on the front wheel and in the forward direction on the rear wheel.
- B.
In the forward direction on the front wheel and in the backward direction on the rear wheel.
- C.
In the backward direction on both the front and rear wheels.
- D.
In the backward direction on both the front and rear wheels.
Correct Answer
D. In the backward direction on both the front and rear wheels. -
- 2.
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
- A.
29%
- B.
15%
- C.
10%
- D.
45%
Correct Answer
A. 29% -
- 3.
Which of the following plots would be a straight line ?
- A.
Logarithm of decay rate against logarithm of time
- B.
Logarithm of decay rate against logarithm of number of decaying nuclei
- C.
Decay rate against time
- D.
Number of decaying nuclei against time
Correct Answer
B. Logarithm of decay rate against logarithm of number of decaying nuclei -
- 4.
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?
- A.
Y has an atomic number of 102
- B.
Y has an atomic number of 101
- C.
Z has an atomic number of 100
- D.
Z has an atomic number of 101
Correct Answer
B. Y has an atomic number of 101 -
- 5.
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
- A.
AP
- B.
GP
- C.
HP
- D.
None of these
Correct Answer
C. HP -
- 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?
- A.
3/8
- B.
5/8
- C.
3/4
- D.
None of these
Correct Answer
A. 3/8 -
- 7.
If cos2A + cos2B + cos2C = 1 then ABC is a
- A.
Right angle triangle
- B.
Equilateral triangle
- C.
All the angles are acute
- D.
None of these
Correct Answer
A. Right angle triangle -
- 8.
Image of point (3,8) in the line x + 3y = 7 is
- A.
(-1,-4)
- B.
(-1,4)
- C.
(2,-4)
- D.
(-2,-4)
Correct Answer
A. (-1,-4) -
- 9.
The mass number of a nucleus is
- A.
Always less than its atomic number
- B.
Always more than its atomic number
- C.
Sometimes more than and sometimes equal to its atomic number
- D.
None of the above
Correct Answer
C. Sometimes more than and sometimes equal to its atomic number -
- 10.
The maximum KE of the photoelectron emitted from a surface is dependent on
- A.
The intensity of incident radiation
- B.
The potential of the collector electrode
- C.
The frequency of incident radiation
- D.
The angle of incidence of radiation of the surface
Correct Answer
C. The frequency of incident radiation -
- 11.
Which of the following is not an essential condition for interference
- A.
The two interfering waves must be propagated in almost the same direction or the two interfering waves must intersect at a very small angle
- B.
The waves must have the same time period and wavelength
- C.
Amplitude of the two waves should be the same
- D.
The interfering beams of light must originate from the same source
Correct Answer
C. Amplitude of the two waves should be the same -
- 12.
When X-Ray photons collide with electrons
- A.
They slow down
- B.
Their mass increases
- C.
Their wave length increases
- D.
Their energy decreases
Correct Answer
C. Their wave length increases -
- 13.
An electron emits energy
- A.
Because its in orbit
- B.
When it jumps from one energy level to another
- C.
Electrons are attracted towards the nucleus
- D.
The electrostatic force is insufficient to hold the electrons in orbits
Correct Answer
B. When it jumps from one energy level to another -
- 14.
How many bonds are present in CO2 molecule?
- A.
1
- B.
2
- C.
0
- D.
4
Correct Answer
D. 4 -
- 15.
In a balanced chemical equation
- A.
Atoms are conserved
- B.
Molecules are conserved
- C.
Moles are conserved
- D.
Reactant and product molecules are preserved
Correct Answer
A. Atoms are conserved -
- 16.
How many grams of NaOH will react with 0.2 equivalent of HCl?
- A.
0.59
- B.
0.285
- C.
1.18
- D.
None of these
Correct Answer
A. 0.59 -
- 17.
Which of the following is least acidic
- A.
Ortho-cresol
- B.
Para-cresol
- C.
Phenol
- D.
Meta-cresol
Correct Answer
B. Para-cresol -
- 18.
In Reimer-Tiemann's reaction, the reaction intermediate is
- A.
Carbene
- B.
Dichloro carbene
- C.
Carbonion
- D.
Carbonium ion
Correct Answer
D. Carbonium ion -
- 19.
Which of the following is most acidic?
- A.
C2H5OH
- B.
CH3CHOHCH3
- C.
Ethanol
- D.
CH3OH
Correct Answer
B. CH3CHOHCH3 -
- 20.
A catalyst
- A.
Always slows down the reaction
- B.
Always starts a reaction that would not have ocurred at all otherwise
- C.
Causes changes in the rate of the reaction
- D.
Changes the quantities of the products formed
Correct Answer
C. Causes changes in the rate of the reaction -
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May 19, 2016Quiz Edited by
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May 19, 2016Quiz Created by
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