The mass number of carbon is C-12, it represents the_____________.

• A) Total number of electrons = 12
• B) Total number of protons and neutrons = 12
• C) Total number of protons and electrons = 12
• D) Total number of protons = 12

Example of Super oxide is________.

• A) H2O2
• B) CO2
• C) H2O
• D) KO2

Work done depends upon (i) force (ii) distance moved in direction of force applied and (iii) angle between direction of force and displacement. Which line is always correct if work done is not zero:

• A) (i) and (ii) are not zero
• B) (i) is not zero
• C) (i) and (iii) are not zero
• D) (ii) and (iii) are not zero

The normal breathing process is controlled by______

• A) Ventral respiratory group
• B) Dorsal respiratory group
• C) Cholesterol
• D) Amino acids

The pH value of a neutral solution is

• A) >7
• B) 8
• C) <7
• D) 7

On heating the amplitude of vibrations of materials ________.

• A) Remain constant
• B) First increases then decreases
• C) Increases
• D) Decreases

The reading on the Fahrenheit scale will be double the reading on the centigrade scale when the temperature on the centigrade scale is?

• A) 280° C
• B) 360° C
• C) 160° C
• D) 460° C

Molality is mass-to-mass ratio which is independent of

• A) Amount of Solvent
• B) Temperature of Solution
• C) Volume of Solution
• D) Amount of Solute

Why is blood that flows from the lungs to the heart bright red rather than dark red?

• A) Gastric juices produce the red colour of the blood
• B) Carbon dioxide makes it red
• C) Oxygen makes it red
• D) The lungs add a pigment (dye) to blood as it flows through them

What three things can light rays travel through?

• A) Liquid, Air, Plants
• B) Solids, liquids, gases
• C) Humans, plants, animals
• D) Air, water, outer space

Reflection happens when light strikes and then ----------------- a surface

• A) Refract
• B) Bounces off
• C) Reflect
• D) Break

The process of transforming vegetables oil to ghee is called __________.

• A) Galvanization
• B) Liquification
• C) Hydrogenation
• D) Sublimation

The term for a localized group of organisms belonging to the same species is known as _________

• A) Environment
• B) Biosphere
• C) Ecosystem
• D) Population

The elements of group 3 to 12 are called________

• A) transition elements
• B) noble elements
• C) typical elements
• D) normal elements

The refractive index of a denser medium with respect to a rarer medium is------:

• A) 1
• B) Smaller than 1
• C) Negative
• D) Greater than 1

If the temperature of a gas increased by keeping the volume constant, then:

• A) Its pressure rises
• B) Its pressure falls
• C) Its pressure is constant
• D) Suddenly increases and then decreases

The angle of reflection is 45° for a ray of light which is incident on a plane mirror. Calculate the angle between the reflected and the incident ray.

• A) 100°
• B) 25°
• C) 90°
• D) 50°

Which of the following halogens element has highest electron affinity?

• A) Iodine
• B) Chlorine
• C) Fluorine
• D) bromine

Animals such as foxes that consume other animals for their food and energy

• A) omnivores
• B) Herbivores
• C) Producers
• D) carnivores

The chromatin material is not visible during ________.

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