The SI unit of energy is:

• A) Pascal
• B) Watt
• C) Newton
• D) Joule

An engineer designs different machines. Which is the most efficient?
Input Energy Useful Output Wastage

• A) 450 J 248 J 202 J
• B) 731 J 468 J 263 J
• C) 255 J 153 J 102 J
• D) 510 J 357 J 153 J

The example of giant molecule is______

• A) SiC
• B) Diamond
• C) AgCl
• D) AlN

The Component which is present in larger quantity in solution is known as

• A) Colloids
• B) Solvent
• C) Solute
• D) Mixture

When mercury level rises in the clinical thermometer, the mercury in capillary tube does not contract because?

• A) Mercury takes a long time to contract
• B) The amount of mercury use is very small
• C) The capillary tube is very narrow
• D) The capillary tube has a small constriction near the bulb

The metal reacting readily with co0ld water is.

• A) Na
• B) Ag
• C) Mg
• D) Au

In optical fiber the refractive index of core in comparison to that of cladding is:

• A) Equal
• B) Greater
• C) Smaller
• D) Minor

In the thermite process for extracting copper from its oxide, aluminum functions as a/an?

• A) Reducing agent
• B) Oxidizing agent
• C)
• D)

The amount of heat required to raise the temperature of 1 kg mass of that substance through 1K is called its__________.

• A) Specific heat
• B) Specific energy
• C) Latent energy
• D) Latent heat

Galvanization is a method to___________.

• A) Improve strength of iron metal
• B) Extract iron from ores
• C) Protect food from rancidity
• D) Protect iron from corrosion

Which line represents a vector that is multiplied by a positive integer greater than one
magnitude direction

• A) increases remains the same
• B) decreases changes
• C) increases changes
• D) decreases remains the same

If a ball falls from a height to ground the total mechanical energy will be _____.

• A) Zero
• B) Decrease
• C) Constant
• D) Increases

Specific heat capacity is the property of the substance per unit:

• A) Temperature
• B) Mass
• C) Volume
• D) Weight

Motion of freely falling body is an example of ________ motion.

• A) Vibratory motion
• B) Linear motion
• C) Random motion
• D) Circular motion

Greater the value of refractive index of a medium , the blending of light will be _______.

• A) Greater
• B) Smaller
• C) Zero
• D) Negative

In the electrolytic refining of copper, which electrode is the source of pure copper?

• A) Anode
• B) Cathode
• C)
• D)

The organizational level which includes all of the other levels is known as_________

• A) Organism
• B) Cell
• C) Biosphere
• D) Ecosystem

What is another name for the windpipe?

• A) Trachea
• B) Larynx
• C) Lungs
• D) Oesophagus

Working principle of geyser bases on which of the following?

• A) Conduction
• B) Charles law
• C) Convection
• D) Radiation

Another statement of Newton second law of motion is “rate of change of momentum is equal to________”

• A) Acceleration
• B) Force
• C) Mass
• D) Velocity