Science Olympiad Mock Test - 2 - Class 6 MCQ

The code of different letters is given below as:
L -- !
I -- @
N --- #
G --- $
E --- %
R ----- &
Similarly, we can find out the code for GINGER.
GINGER = $@#$%&

Silk is obtained from silk worm; similarly, wool is obtained from sheep.  

Inder, Mohan, John, Raman, Jack
From the given arrangement, Raman is sitting second to the right of Mohan.

Two miscible liquids can be separated by the process of distillation.
This method of separation is based on the difference in the boiling points of the components of the mixture.

Speed of light in air is about 3,00,000 km/s. Light travel faster than sound, jet aeroplane, and supersonic plane.  

Heating and dropping a magnet may demagnetise the magnet to lose its magnetic property.  

Jute grows best during the rainy season. Hence, cultivation is done prior to the rainy season and the harvesting begins after the rainy season, i.e., around July and continues till October.  

When a body covers equal distance in equal interval of time, the motion of a body is called uniform motion.  

When an electrician repairs electric line, he wears rubber gloves as rubber is a bad conductor of electric current and prevents him from electric shock.  

Both the processes are chemical changes as the change cannot be reversed.  

Since there is a difference in the size of the rice grains and the salt crystals, sieving is the best and the most convenient method to separate them.
Alternately, since rice is insoluble and salt is soluble in water the mixture may be added to water and then rice can be separated by filtration using a filter paper and then salt can be separated by evaporation.
However, this is not the best option.

Light travels in straight lines. It cannot bend. This phenomenon is known as rectilinear propagation of light. 

A freely suspended magnet always aligns in N-S direction having North Pole towards north and South Pole towards south.  

Sheep is reared for wool, which is a proteinaceous fibre present as the body hair on the animal.  

The motion of a simple pendulum is known as periodic motion, motion repeated in equal intervals of time.  

Inside the torch, two or more cells are placed with positive – negative – positive – negative terminals to power the torch, else with any other arrangement, it won't work.  

Burning of a candle is an example of both a physical and a chemical change.
Burning of the paraffin wax is a chemical change as a new substances (carbon dioxide + water vapour) are formed along with the release of energy as heat and light.
However, melting of wax is a physical change.

Petrol, kerosene and other petroleum products are separated by the process of fractional distillation using a fractional column.  

A weathercock shows the direction in which the air is moving at that place.

All of the given substances are soluble in water and are called solute. Solute is the substance which is dissolved in a solvent.  

A bike runs on petrol. Similarly, an air conditioner runs on electricity.  

Every next letter for the corresponding term is obtained after getting two jumps in the original term.
A + 2 = C
B + 2 = D
C + 2 = E

Similarly,
M + 2 = O
N + 2 = P
O + 2 = Q

B and D are siblings, so A and C are husband and wife.
M is the paternal uncle of D and hence, the brother of D's father, who is A.

After rearranging the given letters, we get

Y L A T I = I T A L Y; which is a country.

The motion described by a simple pendulum is called oscillatory motion as it moves back and forth.  

Glass is not a conductor, while copper wire, sea water, and graphite are conductors of electricity.  

At 4^oC, the density of water is maximum.  

Mustard oil and water are immiscible and the mixture can be separated by decantation using a separating funnel.  

The instrument used to see above the water surface from submarine is called periscope. 

North pole of a magnet can be identified by another magnet having marked north and south poles by attracting or repelling it.