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Petroleum contains a large number of components having different boiling points. They are separated by fractional distillation as shown in the given figure : The boiling point range of few fractions of petroleum is given in the table.

Identify P, Q, R and S.

-------- P---------Q---------R---------S
AFuel oil--Diesel--Kerosene--Petrol
BKerosene--Petrol--Fuel oil--Diesel
CPetrol--Kerosene--Diesel--Fuel oil
DDiesel--Fuel oil--Petrol--Kerosene

Ms. Abha, a science teacher demonstrated three experiments in lab as follows :

Which of the following observations and inferences drawn is/are correct?

AI and II only
BII and III only
CIII only
DI only

The given diagram shows changes in uterine lining during a menstrual cycle (divided in five phases, a to f).
(i) When release of the egg from the ovary is expected to happen?
(ii) When menstruation is expected to occur?
(iii) If the egg gets fertilized, when implantation of embryo is expected to occur?


A i-d, ii-a to b, iii- e to f
B i-c to d, ii-e to f, iii- a to b
C i-c, ii-a to b, iii- d to e
D i-d to c, ii-c, iii- e to f

Refer to the given dichotomous key and answer the following questions.
I. (A) The cells of tissue have walls. -Go to II
(B) The cells of tissue have no walls.
-Go to III
II. (A) The cells are living. - Go to IV
(B) The cells are dead. - Go to V
III. (A) The tissue lines the oviducts. - R
(B) The tissue transports nutrients. - S
IV. (A) Cells store air. - P
(B) The tissue conducts nutrients. - Q
V. (A) The tissue conducts water. - T
(B) It is only a mechanical tissue. - U
Select the incorrect option regarding tissues P, Q, R, S, T and U.

A P is found in aquatic floating plants whereas T is greatly reduced or absent in aquatic plants.
B R and S are animal tissues while P and Q are plant tissues.
C S can be xylem, Q can be blood and U can be parenchyma.
D R is ciliated epithelial tissue whereas U possesses uniform wall thickenings of lignin.

The given table shows some properties of four substances P, Q, R and S.

Study the table carefully and identify P, Q, R and S.

Study the given figure and answer the following questions.

After making a 1/2 clockwise turn followed by 5/8 anti-clockwise turn, Rahul is facing the Church. Where was he facing before he made the turns?

AMall
BAirport
CHospital
DLibrary

Refer to the given flow chart and select the incorrect statement regarding P, Q and R.


A If P is an adventitious root then it could be sweet potato, whereas if P is a tap root then it could be turnip.
B Q could be stilt root found in sugarcane or prop root found in banyan tree.
C R is found in money plant and betel.
D Q and R are modifications of tap root whereas P is a modification of adventitious root only.

Match column I with column II and select the correct option from the given codes.


A a - (ii), b - (iii), c - (iv), d - (i)
B a - (iv), b - (iii), c - (i), d - (ii)
C a - (ii), b - (i), c - (iii), d - (iv)
D a - (iii), b - (iv), c - (ii), d - (i)

Which one of the following statements is not correct?

ADispersion can easily be demonstrated using a convex lens.
BA spectrum is formed when white light is dispersed.
CViolet light dispersed the most while passing through a triangular prism.
DDispersion demonstrates that white light can be broken up.

Which of the following statements about a solid is incorrect?

AThe particles in a solid vibrate about fixed positions.
BThere is very little space between the particles in a solid.
CThe particles in a solid can move around freely.
DThere are usually strong forces between the particles in a solid.