User Forum

Identify the types of teeth labelled as P, Q, R and S in the given figure and match them with their respective functions given below.
Functions
(i) Crush the food
(ii) Tear the food
(iii) Grind and chew the food
(iv) Bite the food


AP-(i), Q-(iv), R-(iii), S-(ii)
BP-(iii), Q-(ii), R-(iv), S-(i)
CP-(iv), Q-(ii), R-(i), S-(iii)
DP-(iv), Q-(iii), R-(i), S-(ii)

Refer to the given figure of human digestive system and select the option which correctly answers (i), (ii) and (iii).

(i) The inner lining of which of the labelled parts secretes mucus and hydrochloric acid?
(ii) Juice secreted from which of the labelled parts breaks down fats completely into fatty acids and glycerol?
(iii) The food that remains undigested and unabsorbed passes into which of the labelled parts?

A(i)-P, (ii)-Q, (iii)-S
B(i)-P, (ii)-R, (iii)-S
C(i)-R, (ii)-P, (iii)-Q
D(i)-Q, (ii)-R, (iii)-P

Refer to the given figures showing three states of matter X, Y and Z and their interconversion processes P, Q, R and S.

Identify the processes P-S and select the incorrect statement regarding them.

AP could be a process that is responsible for reduction in size of glaciers due to global warming whereas Q could be a process that allows you to make snowman in winters.
BR could be a process that helps to dry wet clothes whereas S could be a process that causes fogging of mirror during hot water bath.
CQ could be a process that leads to formation of soil naturally whereas S could be a process that leads to formation of dew on leaves during morning time.
DR could be a process that helps to recharge water table whereas P could be a process that causes flooding of rivers during heavy rain.

B₁, B₂ and B₃ are the three identical bulbs connected to a battery of steady e.m.f. with key K closed. What happens to the brightness of the bulbs B₁ and B₂ when the key is opened?


ABrightness of the bulb B₁ increases and that of bulb B₂ decreases.
BBrightness of the bulbs B₁ and B₂ increases.
CBrightness of the bulb B₁ decreases and that of bulb B₂ increases.
DBrightness of the bulbs B₁ and B₂ decreases.

Refer to the given classification chart and select the option that correctly identifies P, Q, R, S and T.

Two thin long wires carry currents I₁ and I₂ along x-axis and y-axis, respectively, as shown in the given figure. Which one of the following statements is correct?


AMagnetic field is zero at least at one point in each quadrant.
BMagnetic field can be zero somewhere in the first quadrant.
CMagnetic field can be zero somewhere in the second quadrant.
DMagnetic field is non-zero at all points in the third quadrant.

Refer to the given flow chart showing energy conversion and select the option that correctly identifies P, Q, R and S.

Refer to the given diagram and select the option that correctly identifies bird X.


ASiberian crane
BPenguin
CArctic tern
DHeron

Select the pair that is similar to the one given in the box based on their edible part.


ATea : Celery
BTurmeric : Rice
CPotato : Carrot
DSoybean : Chilli

Anu blew hard on a mirror surface. She observed that the mirror became misty because of tiny water droplets that formed on the mirror. What can she conclude from this activity?


ACarbon dioxide is given off when we exhale.
BOxygen is given off when we exhale.
CWater vapours are given off when we exhale.
DNone of these