User Forum

Refer to the given flow chart and identify P-S.

Now, select the option that correctly represents X and Y shown in the given figures.

An object is released from a height h. At a certain height, its kinetic energy is (³⁄₅)^th of its potential energy. The speed of the particle at that instant is

A
B
C
D

The given bar graph shows the respiratory quotient (RQ) of three food substrates P, Q and R. Identify the food substrates and select the correct option regarding them.


A Sportsperson should consume food rich in R for gaining instant energy.
B A person recovering from surgery should consume food rich in Q.
C Animals inhabiting cold regions possess thick deposit of P under their skin.
D All of these

Chalk is used for writing on blackboards because

AIt is a soft rock
BIt is made up of sandstone
CIt is a hard rock
DIt is made up of silica.

The distance time graph of two persons X and Y in a 100 m race are depicted in the given figure.

Then, select the incorrect statement(s).
(i) X and Y are at maximum distance to each other in the time duration 8-10 s.
(ii) The maximum distance between X and Y is more than 20 m.
(iii) The average speed of X is greater than that of Y.

A(i) and (ii) only
B(i) and (iii) only
C(ii) only
D(i), (ii) and (iii)

Three students of class 6 suggested the methods to separate the given types of mixtures.
Anushka : A heterogeneous solid-liquid mixture in which solid is lighter than liquid can be separated by filtration.
Jay : A heterogeneous solid-solid mixture containing one water soluble component can be separated by sedimentation-decantation followed by condensation.
Kriti : A heterogeneous liquid-liquid mixture can be separated by crystallisation.
The method(s) given by which of them is/are correct?

AJay only
BJay and Kriti only
CAnushka and Kriti only
DAnushka only

Study the given flow chart and identify the objects W, X, Y and Z.

Refer to the given Venn diagram and select the option that correctly identifies animals W, X, Y and Z.

Select the option that on unscrambling gives the name of a planet that rotates from east to west.

ATUIPJRE
BAURTNS
CUERYMCR
DRAUUNS

Read the given passage and fill in the blanks by choosing an appropriate option. There are some changes in which heat from outside is absorbed leaving the surroundings cooler while in other changes heat is given out making the surroundings warmer. A change in which heat is given out is called a/an _(i)_ change e.g., _(ii)_ , while a change in which heat is taken in is called a/an _(iii)_ change e.g., _(iv)_. There are many changes in which heat is neither given out nor taken in e.g., _(v)_.