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Select the incorrect match.

An object is accelerating under the influence of a force F₁ on a frictionless surface. A while later, an opposing force F₂ of the same magnitude acts on it as shown in the figure. What will happen to the object?


AThe object will slow down.
BThe object will move at constant velocity.
CThe object will come to rest immediately after the opposing force acts on it.
DThe object will move in the opposite direction.

Study the given flow chart based on states of matter. Which of the following is correct regarding this?

In a hydro power plant,

A Potential energy possessed by stored water is converted into electricity
B Kinetic energy possessed by stored water is converted into potential energy
C Electricity is extracted from water
D Water is converted into steam to produce electricity.

Manita conducted an experiment wherein she took a flowering plant and covered all its flowers with a plastic bag for two weeks. She noticed that during the two weeks’ duration the fruits started to develop from the flowers on the plant. Which of the following could not be the reason for development of fruits?

AThe flowers were already pollinated before Manita enclosed them in the plastic bag.
BThe flowers are bisexual.
CThe anthers and stigmas of the flowers mature at about the same time.
DThe flowers contain only the male reproductive organs.

Refer to the given food web. What will happen if all T organisms are removed from the given food web?


AThe population of R and S will increase.
BThe population of Q will decrease.
CThe population of R will increase but population of S will decrease.
DBoth A and B

Amit walks 20 metres towards East. Turning to the right he walks 50 metres, then turning left he walks 20 metres, then turning left he walks 80 metres, then turning left he walks 40 metres and stops. In what direction is he with respect to his starting point?

A South
B West
C North
D East

A plane mirror reflects a pencil of light to form a real image. Then the pencil of light incident on the mirror is

AParallel
BConvergent
CDivergent
DNone of these.

In order to dissolve the greatest amount of sugar in a cup of water within the fastest possible time, you should ________.

AUse sugar in large pieces, and cool the water
BUse sugar in large pieces, and heat the water
CUse crushed sugar and cool the water
DUse crushed sugar and heat the water

Jayesh bought three different kinds of fish, P, Q and R. He put fish P population and fish Q population into tank X, and fish P population and fish R population into Y. He recorded the number of each fish in each tank for a week. There were no dead fish in the tank when he checked every day. The graphs below show the results at the end of the week.

Which of the following shows the prey-predator relationship between the three fishes?

AP → Q → R
BQ → P → R
CR → P → Q
DQ → R → P