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A force can be either a push or pull. Which of the following classifications has been described INCORRECTLY?

Beena obtains a blurred image of an object on a screen by using a concave mirror. In order to obtain a sharp image on the screen, she will have to shift the mirror _______.

(A) Towards the screen

(B) Away from the screen

(C) Either towards or away from the screen depending upon the position of the object

Observe the given graph showing changes in endometrium in a female during her menstrual cycle and select the correct statement regarding P, Q, R and S.


ADuring phase P, secretion of FSH and estrogen increases, which develops the uterine lining.
B Phase R involves release of ovum from an ovary, marked by peak levels of LH and progesterone.
C In phase Q, relaxin hormone attains a peak and repairs endometrium of uterus.
D During phase S, progesterone is secreted from ovary and maintains thickness of endometrium.

Refer to the given figure illustrating different types of pollination in plants. Rishi planted three different species of plants (X, Y and Z) in his garden whose seeds are dispersed by explosive mechanism. The given figure shows distribution of these plants in Rishi’s garden over a time period. Now, select the correct statement regarding it.


A X undergoes process P only whereas Y and Z undergo processes Q and R only.
B X could be a male plant of species undergoing only process R whereas Y and Z plants could undergo any of the processes P, Q or R depending upon the type of species.
C X is a plant undergoing only process Q so its population does not increase with time in the absence of other plant of the same species in the garden.
D Plants Y and Z are unisexual plants which can undergo only processes P and Q thereby assuring fertilisation and seed setting in absence of other plants of their species.

Study the given flow chart and fill in the blanks by selecting an appropriate option.

Red cabbage juice is __(i)__ in colour. It will turn __(ii)__ in spinach juice and __(iii) __ in window cleaner. (i), (ii) and (iii) are respectively

ARed, green and pink
BRed, pink and green
CPurple, red and green
DPurple, green and yellow.

Ms. Shobhna conducted a science activity in following steps :
I : She made crystals of pure copper sulphate from an impure sample.
II : She dissolved the crystals in pure water to make a blue solution.
III : She added a metallic piece into the copper sulphate solution and after some time colour of the solution changed to green.
Which of the following statements is correct regarding this activity?

AStep I involves a physical change while steps II and III involve chemical changes.
BSteps I and II involve physical changes while step III involves chemical change.
CAll the steps involve physical changes.
DAll the steps involve chemical changes.