The naturally occurring resources of metals are known as__________.

• A) Minerals raw materials
• B) Minerals rocks
• C) Mineral deposit
• D) Mineral ores

The number of maximum electrons in d-sub shell are

• A) 6
• B) 10
• C) 14
• D) 2

What is the purpose of the little hairs inside the nose?

• A) To fight disease
• B) To keep dust out of the lung
• C) They serve no purpose
• D) To tickle the nose and cause sneezes

Friction can be reduced through use of ball bearings because:

• A) ball bearings convert kinetic friction into rolling friction
• B) ball bearings make the surface smooth
• C) ball bearings have no friction of their own
• D) ball bearings make the surface rough allowing better grip

Equations of motion can only use to find the solution of problems for ________.

• A) Motion in straight line
• B) Motion along curved path
• C) Motion along the circular path
• D) All of above

Isotopes are sisters atoms of same elements with similar chemical properties but different ________ .

• A) Atomic weights
• B) Atomic numbers
• C) Atomic volume
• D) Atomic structure

A hydroelectric power plant converts the gravitational potential energy of water to Electric Energy. If 150,000 kg of water flowing down a height of 35m generate 50 MW. The efficiency of the system is

• A) 50 to 55%
• B) 56 to 62%
• C) 93 to 97%
• D) 75 to 85%

Which of the following quantum number explain the shape of sub-shells in atomic orbitals?

• A) Azimuthal quantum number (l)
• B) Principal quantum number (n)
• C) Magnetic quantum number (m)
• D) Spin quantum numbers (s)

The halogen atom which has highest value of electron negativity is ______.

• A) Cl-
• B) I-
• C) F-
• D) Br-

If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of?

• A) Ideal gas law
• B) Avogadro’s’ law
• C) Charles law
• D) Boyle’s law

The gas which is found 78% by volume in air is______.

• A) Cl2
• B) N2
• C) H2
• D) O2

The metal which corrodes rapidly when exposed to atmospheres is________.

• A) Tin (Sn)
• B) Silver (Ag)
• C) Iron (Fe)
• D) Sodium (Na)

Which of the following is not a derived unit:

• A) intensity
• B) Watt
• C) Kelvin
• D) Joule

When light travels from glass to air , the speed of light will _________.

• A) Increases
• B) Decreases
• C) Depend on angle of incidence
• D) Not change

A straight line graph proportional between distance and time indicates

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

The unit of power is represented by

• A) W / s
• B) J / s
• C) J s
• D) W s

The aluminum metal is used for making cooking utensils because metals are_________.

• A) Malleable
• B) Ductile
• C) Solid at room temperature
• D) Good conductors

An object is placed at a distance which is equal to the radius of curvature of the mirror. The size of the object is 2 cm then the size of image will be:

• A) 1.5 cm
• B) 2.0 cm
• C) 1.0 cm
• D) 0.5 cm

In human beings how does the food move through digestive tract?

• A) By cilia
• B) By wavelike muscular contraction
• C) By gravity
• D) By chemical absorption

Which line correctly identifies the steam point on the scales of temperature:
Kelvin/K Celsius/ºC Fahrenheit/ºF

• A) 373 0 32
• B) 373 100 212
• C) 273 100 212
• D) 273 0 32