Which of the following statements is/are correct?
I. Natural fibres burn to form a residue on heating.
II. Wool and silk burn with smell of burning hair.
III. Silk being a natural fibre absorbs less water than nylon.
IV. Natural fibres are moth resistant.
V. Synthetic fibres maintain a permanent crease and do not get crumpled.
AI and V only
BI, II and V only
CII, III and IV only
DII and V only
Refer to the given Venn diagram and select the option that correctly
identifies animals P, Q, R and S.
The given figure shows various parts of the human digestive system which are labelled as d, e, f, g and
h. Following are the functions of some of those parts:
1. Mixing of food with digestive juices.
2. Absorption of nutrients from food.
3. Absorption of water from undigested food.
Select the option that correctly matches the function with the labelled part of the digestive system.
Roots of these plants do not get air under the soil, hence these plants develop special
roots that grow above the soil and are called as breathing roots. In what kind of regions,
such plants are expected to grow?
P and Q are two distant places on earth located at about 125 kms distance. Which of the following assumptions can be made about these places?
AThe temperature at a particular time will be higher at place P than that at place Q.
BAir current will flow from place P to Q.
CIt is afternoon at place Q while evening at place P.
DNone of these assumptions can be made.
Shweta wanted to find out the volumes of three objects,
P, Q and R. She put them into a beaker of water in
different combinations as shown below.
Which of the following bar graphs correctly shows the volume of the three objects?
When some liquid evaporates, the average speed of the molecules remaining will ____.
(A) Increase because the more energetic molecules have left
(B) Decrease because the more energetic molecules have left
(C) Remain unchanged because all molecules have about the same speed
(D) Increase because there are fewer molecules