The average power of an athlete of mass 60 kg in climbing a staircase 10 m high in 10 seconds is approximately:

• A) 600 W
• B) 900 W
• C) 60 W
• D) 300 W

Loss of hydrogen atoms by an element is called _________.

• A) Sublimation
• B) Reduction
• C) Oxidation
• D) Hydrogenation

When experimental results are in accordance with theoretical prediction this becomes:

• A) an assumption
• B) a law
• C) a theory
• D) a hypothesis

Liquid___________is used as a coolant to freeze foods rapidly

• A) Hydrogen
• B) Ammonia
• C) Nitrogen
• D) Oxygen

Same force F is applied on two objects X and Y but the accelerations caused by this Applied F are not same. The object X has acceleration three times that of object Y because__________

• A) X has different shape so easily moved
• B) X is three times more massive than Y
• C) X has one-third the mass of Y
• D) Y has more value of friction

Optical instrument like telescope, microscopes and optical filers are bases on which light phenomena?

• A) Diffraction of light
• B) Total internal reflection of light
• C) Absorption of light
• D) Scattered of light

which line correctly identifies average speed:

• A) distance covered in unit time
• B) displacement in unit time
• C) total distance covered divided by time taken
• D) distance covered in constant time intervals

Two balls of different masses, and hence of different sizes, but of the same material, are thrown upwards at the same speed. They reach the maximum height and fall back to the ground. Ignoring air resistance the balls will fall to
the ground

• A) lighter ball first
• B) heavy ball first
• C) simultaneously
• D) larger sized ball first

The removal of the metabolic wastes of an organism is:

• A) Excretion
• B) renal artery
• C) Defecation
• D) Respiration

In Prokaryotic cells the outer most layer is known as ________.

• A) Cytoplasm
• B) Cell membrane
• C) Cell wall
• D) Cytoskeleton

A motion where every particle of a body has the exact same motion is an example of

• A) circular motion
• B) translatory motion
• C) random motion
• D) vibratory motion

The example of scalar quantity is ________.

• A) Force
• B) Momentum
• C) Work
• D) Weight

A battery of car has stored ………….. energy, which it converts to electric energy when required.

• A) potential energy
• B) thermal energy
• C) chemical energy
• D) kinetic energy

During which stage of Mitosis does the nucleus envelope begin to disappear?

• A) Anaphase
• B) Telophase
• C) Metaphase
• D) Prophase

Efficiency can also be defined as:

• A) input power × useful output power
• B) useful output power ÷ input power
• C) useful output power ÷ input energy
• D) input power ÷ total output power

A group of organisms of the same species that interbreed and live in the same place

• A) species
• B) Population
• C) Community
• D) Organism

The graph between V and 1/P at constant temperature is:

• A) A curve of any shape
• B) Hyperbola
• C) A straight line
• D) Parabola

If a bus is moving with uniform velocity on highway, it can be concluded that _______.

• A) There are no forces acting on it
• B) It is moving with uniform acceleration
• C) There are no unbalanced (net) forces acting on it
• D) It has large value of inertia

The kidneys, ureters, urethra and urinary bladder make up the:

• A) kidney system
• B) excretory system
• C) circulatory system
• D) urinary system

White light separates into different colors after passing through a -------------:

• A) Camera
• B) Mirror
• C) Hammer
• D) Prism