ETEA Test#9 (Engineering)

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This test includes;
Math Chapter#11, Book-1
Physics Chapter#9, Book-1
Chemistry Chapter#11, Book-1
English Punctuation

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Question # 45 :

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

Question # 42 :

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

Question # 47 :

1 point

∆

Clear selection

Question # 12 :

1 point

Positive

Negative

Zero

Undefined

Clear selection

Question # 3 :

1 point

50 kJ

100 kJ

150kJ

300kJ

Clear selection

Question # 25 : The path difference between two interfering waves corresponding to a phase difference π is

1 point

3λ

λ/2

λ/4

Clear selection

Question # 5 : For reaction to occur spontaneously

1 point

∆H must be negative

∆H must be positive

∆H must be zero

∆H must be unity

Clear selection

Question # 7 : Which of the following enthalpy terms will always have a different sign?

1 point

Enthalpy of neutralization

Enthalpy of atomization

Enthalpy of combustion

Enthalpy of solution

Clear selection

Question # 26 : The condition for obtaining Fraunhofer diffraction from a single slit is that the light wavefront incident on the slit should be

1 point

spherical

cylindrical

elliptical

planar

Clear selection

Question # 16 : All of the people at the school, including the teachers and _____ were glad when summer break came

1 point

students:

students,

students;

students

Clear selection

Question # 31 : Yellow light is used in a single slit diffraction experiment with slit width of 0.6 mm. If yellow light is replaced by x-rays, then the observed pattern will reveal

1 point

that the central maximum is narrower

more number of fringes

less number of fringes

no diffraction pattern

Clear selection

Question # 34 : A slit is illuminated by white light. The first minimum for red light falls at an angle of 30ᵒ. If wavelength of red light is 6500 Aᵒ, then the slit width is

1 point

0.3 micron

1.3 micron

2 m

1 mm

Clear selection

Question # 46 :

1 point

abc

Clear selection

Question # 17 : Sit up straight ___

1 point

;

Clear selection

Question # 15 : Hess’s law is applicable for determination of heat of

1 point

Reaction

Formation

Transition

All of these

Clear selection

Question # 10 : The heat of formation of a compound is equal in magnitude to its

1 point

Heat of reaction

Heat of combustion

Heat of hydrogenation

Heat of decomposition into its elements

Clear selection

Question # 49 :

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

Question # 32 : Two coherent sources of light produce destructive interference when phase difference between them is

1 point

2π

π/2

Clear selection

Question # 40 : An equilateral triangle is inscribed in a circle of radius 5cm, the perimeter of triangle is?

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

Give us your Valid Mobile Number *

Question # 43 :

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

Question # 2 : Which of the following value of ∆Hf represent that the product is least stable?

1 point

-94.0 kcalmol-1

-231.6 kcal mol-1

+21.4 kcal mol-1

+64.8 kcal mol-1

Clear selection

Question # 23 : The maximum no. of possible interference maxima for slit-separation equal to twice the wavelength in young’s double slit experiment is

1 point

three

five

infinite

zero

Clear selection

Question # 29 : While both light and sound show wave character, diffraction is much harder to observe in light. This is because

1 point

speed of light is far greater

wavelength of light is far smaller

light does not require a medium

wave of light are transverse

Clear selection

Question # 13 :

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

Question # 11 :

1 point

∆H < ∆E

∆H >∆E

∆H =∆E

H and ∆E are not related

Clear selection

Question # 28 : If in the experiment of diffraction at a single slit, the width of slit is equal to twice the wavelength of light used, the angle of diffraction for the first minimum will be

1 point

30ᵒ

45ᵒ

60ᵒ

90ᵒ

Clear selection

Question # 37 :

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

Question # 6 : The heat absorb at constant volume is equal to the system change in

1 point

Enthalpy

Entropy

ntropy x Temperature

Internal energy

Clear selection

Question # 30 : Polarization of light takes place due to many processes. Which of the following will not cause polarization?

1 point

Reflection

Double refraction

scattering

Diffraction

Clear selection

Question # 36 :

1 point

Clear selection

Question # 19 : Who do you think will win the contest ___

1 point

Clear selection

Question # 41 :

1 point

Clear selection

Question # 48 :

1 point

2π

4π

6π

Clear selection

Question # 33 : Monochromatic green light of wavelength 5 x 10-7 m illuminates a pair of slits 1 mm apart. The separation of nearest bright fringes in the interference pattern on a screen 2 m away is

1 point

0.25 mm

0.5 mm

0.1 mm

1.0 mm

Clear selection

Question # 9 : Which of the following process is endothermic?

1 point

Condensation of steam

Electrolysis of water

Freezing of water

Option 4

Clear selection

Question # 38 :

1 point

c/a

a/c

None of these

Clear selection

Question # 27 : For producing a broad central maximum by diffraction from a single slit

1 point

slit must be narrow

slit must be broad

source must be narrow

sources must be broad

Clear selection

Question # 4 : For reaction to occur spontaneously

1 point

∆H must be negative

∆H must be positive

∆H must be zero

∆H must be unity

Clear selection

Question # 8 : The heat of neutralization is maximum for

1 point

Option 1

Option 2

Option 3

Option 4

Clear selection

Question # 35 : Two tourmaline crystals are oriented with their crystallographic axis making an angle of 30ᵒ. What percentage of the incident unpolarized light would pass through the system?

1 point

37.5