General Science

Which among the following sugars is maximum in Honey?

• Glucose

• Sucrose

• Fructose

• Maltose

Answer explanation

Honey is a sweet, viscous food substance made by honey bees and some related insects. Honey is considered to be a mixture of D-glucose, D-fructose, and sucrose with the maximum being Fructose.

Which of the following states of matter has the weakest Intermolecular forces?

• Solid

• Liquid

• Gas

• Plasma

Answer explanation

The fourth state of matter is called as Plasma. In Plasma, the medium is in the form of positive and negative ions. Plasma occurs in the atmosphere of stars (including the sun) and in discharge tubes.

What is the S.I unit of frequency?

• Second

• Watt

• Joule

• Hertz

Which of the following is correct about Pressure?

• Pressure is a scalar quantity

• Pressure is a vector quantity

• Pressure is a scalar quantity but obeys vector laws

• None of the above

Answer explanation

Pressure is a scalar quantity. Pressure is derived from Force which is a vector quantity but still pressure is a scalar. The reason for this is that pressure always acts perpendicular to the surface it acts upon.

Which of the following is correct about Convection?

• It is possible in solids only

• It is possible in fluids only

• It is possible in solids and gases only

• None of the above

Answer explanation

Convection is a mode of heat transfer by actual motion of matter. It is possible only in fluids.

During inhalation, the ribs

• Move inwards

• Move sideways

• Move upwards

• Move downwards

Answer explanation

The ribs help in the expansion and contraction of the thoracic cavity (though that is primarily the function of the diaphragm). When we inhale, the ribs move up and outwards while the diaphragm moves down. An exact opposite movement occurs during exhalation when the ribs move down and inwards while the diaphragm moves up. The outward movement of the ribs during inhalation expands our chest cavity increasing the space to accommodate air that rushes to lungs, whereas the inward movement of the ribs helps the carbon dioxide filled the air to be pushed out of the lungs.

When light from some sources enters to the earth’s atmosphere, it gets scattered. Which among the following is a reason behind scattering?

• Various wavelengths of light

• dust, smoke and gas molecules

• None of the above

Answer explanation

Scattering of light is the phenomenon in which light rays get deviated from its straight path on striking an obstacle.The scattering of light can be of many reason. Some of them are dust, smoke and gas molecules.

The power of a lens is measured in :

• diopters

• lumen

• candela

• watt

Answer explanation

The power of a lens is defined as the reciprocal of the focal length. The Lens power is measured in dioptres (D).

By how many times are the Electrostatic forces stronger than the Gravitational Forces for a fixed distance?

• 10²

• 10³⁶

• 10¹²

• 5

Answer explanation

Electrostatic forces are 10³⁶ times stronger than the Gravitational Forces for a fixed distance. Electrostatic forces may be attractive or repulsive depending upon the charges. Electrostatic forces are conservative forces and obey inverse square law.

Which of the following is correct about acceleration due to gravity?

• it increases with depth

• it decreases with depth

• it is independent of depth

• None of the above

Answer explanation

The value of acceleration due to gravity decreases with depth. g₀= g(1-d/R) where d is the depth below the centre of the earth.