Fill in the blanks.
The solubility of sugar in water ___(P)___ with an/a ___(Q)___ in ___(R)___ . However, The solubility of salt ___(S)___ very little with temperature.
P Q R S
A Decreases Increase Temperature Increases
B Increases Increase Temperature Increases
CIncreases Decrease Pressure Decreases
D Decreases Increase Pressure Decreases
i cant understand it at all
Which of these factors force the depletion of the world's natural resources?
(i) An increase in the human population.
(ii) The larger number of vehicles in use.
(iii) The greater use of biodegradable products.
(iv) More electrical appliances being used to make work easier.
(B) (i), (ii) & (iv)
(C) (ii) & (iv)
(D) (ii), (iii) & (iv).
Fill in the blanks by choosing an appropriate option. When an electric current is passed through a bulb, the __(i)__ gets so heated that it glows. The element of electric heater is made up of __(ii)__. Wires used in electric fuses break when large electric current is passed through them due to __(iii)__ effect of electric current.
Which of the following factors is/are responsible for the cause of seasons ?
(i) The tilted axis of the Earth.
(ii) The revolution of the Earth.
(iii) The rotation of the Earth.
(A) (i) & (ii)
(B) (i) & (iii)
(C) (i) only
(D) (ii) only.
please explain me .