To increase the crop yield, farmers in an area started
using chemical fertilisers and pesticides tremendously
which caused runoff pollution of a river flowing
Which of the following graphs correctly shows the changes in levels of dissolved oxygen and bacteria present in this river?
The given diagram represents the plot of a river
stream across a town. Water samples are collected
from the river from 5 different places P, Q, R, S
and T. The BOD of the collected water samples is
shown in the following bar diagram.
a. On which of the places (P to T) the highest amount of organic material is released into the river water?
b. Where does a water treatment plant most likely built?
A a - R, b - Between P and Q
B a - S, b - Between Q and T
C a - Q, b - Between R and S
D a - S, b - Between P and R
Chaitanya suffers from stomach ache and bad digestion
whenever he eats any wheat product whereas his
brother Satvik complains of bad vision in dim light.
Which of the following holds true regarding them?
A Chaitanya is suffering from vitamin C deficiency and should take more of citrus fruits in his diet.
B Satvik is suffering from iron deficiency and should take more of spinach, apple, etc., in his diet.
C Chaitanya is allergic to wheat products so he should stop taking them to avoid illness caused due to their consumption.
D Satvik is suffering from vitamin B1 deficiency so he should take more of carrots and papaya.
A cylindrical bar magnet is rotated about its axis as shown in figure. If a wire is connected from the axis and is made to touch the cylindrical surface through a contact, then
AA direct current flows in the ammeter
BNo current flows through the ammeter
CA time varying current flows through the ammeter
DNone of these.
acc to me ans is opt b but it is given aplease respond quickly
Study the given table.
Select the option that correctly identifies P-S.
AP-Turnip; Q-Betel; R-Ginger
BP-Onion; Q-Pea; R-Potato
CP-Ginger; Q-Bougainvillea; R-Carrot
DP-Tapioca; Q-Sweet pea; R-Jimikand
i am the greatest boi
To maintain soil fertility, nutrient replenishment of soil is essential. Common methods of adding nutrients to soil are given in the box below.
P = Field fallow Q = Green manure R = Fertilizers S = Organic wastes
Which of the following statements is incorrect regarding this ?
(A) P is not best suited because it leaves a field economically useless for a year or two.
(B) R increases productivity readily but prove to be environmental hazard in long run.
(C) S can cause spread of diseases due to pathogenic cysts present in it.
(D) Q are green plants that are ploughed back into soil to supply specific nutrients in desired ratio.
it is tough !!