At traffic signals, which colour means wait till the light is green ?
This question is a little confusing and traffic lights esp color yellow and orange are using varying, in Rajasthan we dont have yellow or blue lights. We have orange blinkers. CONFUSING.
Following sets of test tubes were made by a class VII science teacher.
She asked the students to find the incorrect statements about the given experimental set-ups.
ABlue litmus solution turns red in test tubes 1 and 3.
BTurmeric solution turns red in test tube 1.
CChina rose indicator turns dark pink in test tubes 2 and 4.
DPhenolphthalein remains colourless in test tubes 2 and 4.
is window cleaner an acid?
Select the INCORRECT statement.
AThe nest of a weaver bird has a tunnel-like opening at the bottom.
BWoodpecker makes its nest in a hole in tree trunk which it pecks with its beak.
CPenguin makes its nest on the ground.
DKoel makes its nest among the thorns of a cactus plant.
In given diagram, an iron cube is heated and placed in a tank of water at room temperature.
Which graph shows the correct change in temperature of the water in the tank over a period of time?
A wave travels through a medium with a speed of 340 m s-1. If the frequency of the wave is doubled, what happens to the wave speed and wavelength?
ARemains constant, doubles
BDoubles, reduced by a factor of two
CRemains constant, reduced by a factor of two
DReduced by a factor of two, remains constant
Which of the following statements is the drawback of the green revolution?
AExcessive use of chemical fertilizers, pesticides, etc. resulted in air, soil and water pollution.
BMore requirement of water by high yielding crops resulted in the depletion of underground water resources.
CUse of agrochemicals was an expensive measure for Indian farmers.
DAll of these
ANSWER MUST BE D