Question

6.A plastic bottle partially filled with water floats on water, even
though the density of the plastic (1.2 g/cc) is more than that of

water. Why is that?

A
Because of the water
in it, the bottle will
stay at any position
within a bucket of
water.

B
Because of the air in
it, the density of the
partly-filled bottle is
less than that of
water.

C
The floating of a
substance in another
has nothing to do
with their relative
densities.

D
(The information is
wrong - if the density
of plastic is more
than water's, it will
sink.)

7.Beakers P and Q both contain the same amount of water, but at
30oC and 70oC respectively.

If we could see the molecules of water in P and Q we would find
that:

A
There is no difference
in the nature of the
molecules or the
speed at which they
are moving in the
two beakers.

B
There is no difference
in the nature of the
molecules but the
molecules in Q are
moving faster than
those in P.

C
Molecules in Q are
moving faster than in
P; and some of them
have split into
Hydrogen and
Oxygen atoms.

D
The speeds of
molecules in P and Q
are similar, but some
in Q have split into
Hydrogen and
Oxygen atoms.

8.Figure P below shows a beaker of water being heated directly.
However, some liquids like alcohol are heated using a water bath
(figure Q). Which of these is NOT likely to be a reason for water
baths to be used?

A
It is safer to use
them with
inflammable liquids.
B
It allows more
uniform heating of
the liquid.

C It is a faster way of
heating a liquid.

D
It is convenient for
liquids with low
boiling points.

9. Vibha took two jars with the same amount of a liquid at room
temperature. She took two solid blocks and put them in the jars.
Here is what she observed.

Jar 1 Jar 2

What can she say based on this observation?
A. The liquid in jar 2 is hotter
than that in jar 1.

B. The two blocks are made of
different materials.

C. D.

The blocks will sink deeper in

The two blocks will float at the
same level in all other liquids.

the liquid in a jar with less
liquid.

Answer 1

Answer:

Answers

6 (b)

7 ( a )

8 (b)

Explanation:

they were so easy please mark me brainlist please