Question

1.A fine copper gauze is taken and placed about half a centimeter
above a Bunsen Burner. When the gas is switched on and lighted
above the gauze, the flame burns only above the copper gauze as
shown in the figure. This demonstrates that:

A Copper is a very good
conductor of heat.

B Copper is a very poor
conductor of heat.

C
The wire gauze
blocks the flow of
oxygen.

D
The wire gauze
blocks the flow of the
gas.

2.We know that all matter consists of molecules. When a gas is
compressed, what happens to its molecules?

A
Nothing happens to
the molecules, their
arrangement or their
movement.

B
Each of the
molecules gets
compressed by about
the same amount.

C Nothing happens to
the molecules, but

D Nothing happens to
the molecules or
their arrangement,

the space between
them reduces.

but they start
moving faster.

3.On a hot summer day, Sarita decides to move her fridge to her
small bedroom, keep its door open, and lock all the doors of the
room. She is hoping that the fridge will cool the room like an AC.
Will her plan work?

A
Yes, because the
room is small and its
doors are closed.

B
Yes, but it will take
more time compared
to an AC.

C
No, because the heat
is being returned to
the room.

D
No, because a fridge
does not cool when
its door is open.

4.Why does a stone floor feel colder than a carpeted floor on a
cold winter night?

A
The stone floor is at a
lower temperature
than the room
temperature.

B
The carpet is at a
higher temperature
than the room
temperature.

C
The stone floor
conducts away heat
from our body faster
than the carpet.

D
Our body can absorb
heat from the carpet
but not from the
stone floor.

Answer 1

Answer:

q2 d part ans

Explanation:

becaus when the gas particle are pressed the move further apart