The characteristics of different fibres are listed as
W : I am strong, elastic, light and burn slowly.
I shrink on heating and form hard beads with smell of burning hair.
X : I burn completely leaving no residue.
Y : I can be woven like silk fibres and dyed in a wide variety of colours. I burn quickly with a smell of burning paper.
Z : I do not get wrinkled easily. I burn slowly and produce black smoke.
W, X, Y and Z are respectively
ATerylene, rayon, cotton and nylon
BBakelite, nylon, rayon and cotton
CMelamine, PVC, nylon and rayon
DNylon, cotton, rayon and polyester.
Which of the following statements is/are
I. Air moves from the region of low pressure to high pressure.
II. Air moves from the region of high pressure to low pressure.
III. Air movement does not depend upon the pressure.
CI and III only
DII and III only
Read the given statements regarding types
(i) P is used by dentists for polishing teeth.
(ii) Q is rich in mineral calcium carbonate and is used for making cement.
(iii) R is used for making statues and floorings.
Select the option which correctly identifies the category of rocks to which P, Q and R belongs.
Powdered form of pumice is used by dentist to polish teeth. It is a type of igneous rock (P). Limestone is rich in calcium carbonate and it is used for making cement. It is a type of sedimentary rock (Q). Marble is used to make statues and floorings. It is a type of metamorphic rock (R) so,correct answer is option C.
A teacher needs to show to her students that soil contains air. Which of the following should she do?
APour some water into a beaker containing soil
BHeat some soil in a pan over stove
CObserve the soil under a microscope
DAll of these
A is the correct answer
I am round and green. You eat me as a vegetable.
I carry a baby plant inside me.
Starting from the first letter cross out every alternate letter in the following options and select the one which gives my name.
B is the correct answer