Adding some distilled water
Decreasing the temperature
Diluting the hydrochloric acid
Grinding the metal into powder
Increasing the pressure
Correct answer is D
No explanation has been provided for this answer.
What is the colour of phenolphthalein indicator in a basic medium?
Blue
Colourless
Orange
Pink
Yellow
Correct answer is D
No explanation has been provided for this answer.
\( ^{234}_{90}Th → ^{234}_{91}Pa + X \)
In the nuclear reaction above, X is
\( ^0_1e \)
\( ^0_{-1}e \)
\( ^4_2He \)
\( ^1_0n \)
\( ^1_1p\)
Correct answer is B
No explanation has been provided for this answer.
When dust particles collide randomly in a beam of Sunlight, the phenomenon observed is known as
Brownian movement.
Dialysis
Diffusion
Osmosis
Tyndall effect
Correct answer is E
No explanation has been provided for this answer.
The most efficient absorber of ultraviolet radiation in the atmosphere is
CO2
H2
H2O
02
O3
Correct answer is E
No explanation has been provided for this answer.