5) It takes some time to see the objects in a dim room when we enter the room from bright sunlight outside. In bright sunlight, pupil of eye contracts expands( contracts, expands ) to control the light. When we enter a dim room, pupil takes some time to contract expand( contract, expand ) to block allow( block, allow ) light to see objects clearly.

Taslima has two glass tubes. Each tube contains a one-rupee coin and a small feather. Tube 1 is with a cork; the air in tube 2 has been pumped out and the tube sealed. After shaking the tubes to bring coin and feather to one end, she quickly brings the tube to a vertical position and watches the two objects fall in tubes 1 and 2.
What is she likely to observe?
In Tube 1 Tube 2( Tube 1, Tube 2 ) -Coin and feather fall at same speed
In Tube 1 2( 1, 2 ) - Coin falls faster than feather

Convex Concave( Convex, Concave ) mirrors are commonly used as rear-view (wing) mirrors in vehicles. These mirrors are fitted on the sides of the vehicle, enabling the driver to see traffic behind him/her to facilitate safe driving. Concave Convex( Concave, Convex ) mirrors are preferred because they always give an inverted erect( inverted, erect ), though diminished, image. Also, they have a wider field of view as they are curved outwards inwards( outwards, inwards ). Thus, it enable the driver to view much smaller larger( smaller, larger ) area than would be possible with a plane mirror.

The first four compounds in a chemical series are CH4 - C2H6 - C3H8 - C4H10.
Identify the fifth C5H10 C5H12( C5H10, C5H12 )

C4 H8 O C3 H7 O2 C3 H8 O( C4 H8 O, C3 H7 O2, C3 H8 O )

Two magnets attract each other because of the motion force gravity( motion, force, gravity ) between them.

Heena was trying to identify three different cells by observing them under the microscope. She noted down her observations as below. Which of the following could be TRUE about these cells?

Cell 1 2( 1, 2 ) is an animal cell
Cell 3 2( 3, 2 ) is a bacterial cell
Cell 3 1( 3, 1 ) is a plant cell

Four participants –Anu, Babli, Charu and Diya enter a 100 metre race in which the first person to reach the finish line wins. All four run at their respective constant speeds from start to finish. The graph shows the distance that each of them covers in the first 4 seconds from the starting point at a constant speed.

On the basis of the graph shown above, answer the following question.How much MORE time does the person finishing second take to reach the finish line than the winner of the race? 5 10 1( 5, 10, 1 ) seconds.

A person in space , where there is no air, is likely to see can't see( see, can't see ) things but can hear not hear( can hear, not hear ) sounds.

An astronomical telescope typically has two convex lenses, while a terrestrial telescope has three. The extra lens in a terrestrial telescopehelp us to see an erect image allow us to do in day time help us to see near by objects( help us to see an erect image, allow us to do in day time, help us to see near by objects )

The density of ice is less than that of water. Shown here is a beaker that contains ONLY SOLID ICE. The initial level is as indicated in the figure.

If all the ice becomes water,the level will go up come down remain at the same place( go up, come down, remain at the same place )