A solution contains 40 g of common salt in 320 g of water at 293 K . Calculate the concentration in terms of mass by mass percentage of the solution
ashraybhugra
Asked:
December 2022
WHICH OF THE FOLLOWING HAS MORE INERTIA [A] A RUBBER BALL AND A STONE OF THE SAME SIZE . [B] A BICYCLE AND A TRAIN . [C] A 5 RUPEE COIN AND A 1 RUPEE COIN .
ashraybhugra
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December 2022
How many litres of 15 percent [ mass \ volume ] sugar solution would it required to get 75g of sugar
ashraybhugra
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December 2022
To make a saturated solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration in terms of mass by mass
ashraybhugra
Asked:
December 2022
Calculate the mass of sodium sulphate required to prepare its 20 percent [ mass by percent ] solution in 100g of water
ashraybhugra
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December 2022
During summer, water kept in an earthen pot becomes cool because of thephenomenon ofa) Diffusion c) Transpirationb) Osmosis d) Evaporation
ashraybhugra
Asked:
December 2022
A pure substance contains a] Two or more types of particles b] One type of particles c] Many types of particles d] Two or more forms of matter
How does evaporation cause cooling .
Differentiate between evaporation and boiling .
ashraybhugra
Asked:
December 2022
Draw a velocity-time graph for the following data: Time (in seconds ) 2 4 6 8 10 12 14 Velocity (in m/s) 5 10 15 20 20 10 0 (a) What type of motion is represented during 0-6 seconds? (b) What is acceleration in the first 6 seconds? (c) Calculate...
ashraybhugra
Asked:
December 2022
How does the water kept in an earthen pot [ Matka ] become cool during summer .
ashraybhugra
Asked:
December 2022
The rate of evaporation decreases with a) Increase in surface area c) Increase in temperature b) Increase in humidity d) Increase in wind speed
ashraybhugra
Asked:
December 2022
Which of the following materials fall in the category of pure substances. Also, classify them as elements and compounds. Ice, Milk, Iron, Hydrochloric acid, Calcium oxide, Mercury, Brick, Wood, Air, Sodium, Soil, Sugar solution, Silver, Calcium carbonate, Tin, Silicon, Carbon dioxide, Blood, Soap and Coal.
Differentiate between elements and compounds .
What are metalloids . Give examples .
What is a pure substance . Explain giving examples .
ashraybhugra
Asked:
December 2022
State the factors that affect the rate of evaporation with an example each .
ashraybhugra
Asked:
December 2022
Differentiate between metals and non-metals on the basis of their physical properties .
Why does a desert cooler cool better on a hot dry day .