A substance undergoes fusion, it

• A) Condenses
• B) Evaporates
• C) Vaporizes
• D) Freezes

For diverging lens, which of the following is true?

• A) The lens is thinner in the center than on the edges.
• B) The lens is thicker in the center than on the edges.
• C) Light must enter it parallel to the principal axis.
• D) The lens must be flat on one side.

The normal human eye can detect colors whose wavelength range from 380 nm to __________.

• A) 470 nm
• B) 700 nm
• C) 560nm
• D) 850 nm

A vector can have (i) magnitude (ii) unit and (iii) direction. If such a vector is multiplied by a positive number greater than one which quantity or quantities do not change:

• A) (i) and (iii)
• B) (ii) and (iii)
• C) (i) only
• D) (i) and (ii)

An object of mass m is moving under a constant force F, causing an acceleration a. If the mass of the object is doubled and the force reduced to:

• A) 0.25 a
• B) a
• C) 2 a
• D) 0.5 a

A straight line graph proportional between displacement and time indicates

• A) uniform velocity
• B) average velocity
• C) uniform speed
• D) average speed

A 1000 kg car uses 250,000 J of fuel energy to increase its speed from 10 m/s to 20 m/s. The efficiency of this fuel conversion is:

• A) 40%
• B) 50%
• C) 60%
• D) 70%

Which line correctly represents mass and weight
mass weight

• A) is a scalar quantity unit is Newton
• B) unit is Newton is a vector quantity
• C) is a vector quantity unit is kilogram
• D) unit is kilogram is a scalar quantity

The tiny air sacs in lungs are called______

• A) Bronchioles
• B) Alveoli
• C) Ravioli
• D) Bronx

if a body does not change its position with respect to the observer then it is said to be in a state of:

• A) retardation
• B) acceleration
• C) motion
• D) rest

Electromagnetic radiations travel through vacuum at speed of ____________ m/s.

• A) 3 x 10 power -8
• B) 1.5 x 10 power 8
• C) 3 x 10 power 8
• D) Zero

The green pigment in plants is due to presence of ________.

• A) Chloroplasts
• B) Cytoplasm
• C) Chromoplasts
• D) Leucoplasts

Image that can be obtained on a screen:

• A) Virtual
• B) Converging
• C) Diverging
• D) Real

___________is the most reactive non-metal.

• A) F
• B) Cl
• C) Br
• D) I

The period of cell division is called ________.

• A) Meiosis
• B) Interphase
• C) Cytokinesis
• D) Mitosis

Left ventricle pushes blood towards………

• A) tricuspid vale
• B) hearts
• C) aorta
• D) lungs

Gradient of line of Velocity-time graph is representing _________ .

• A) Acceleration
• B) Distance
• C) Velocity
• D) Speed

The study of motion of objects with reference to mass and force and the subsequent change of motion is called

• A) general relativity
• B) kinematics
• C) dynamics
• D) mechanics

If wavelength of an electromagnetic wave reduced to half of original at constant speed, the frequency of this wave will be _____________.

• A) Decreases 1/2 times
• B) Increases 2 times
• C) Increases 1/2 times
• D) Decreases 2 times

In using the equations of motion all quantities having direction same as the initial velocity are taken as

• A) uniform
• B) positive
• C) zero
• D) negative