Sonali mixed a packet of salt in a small amount of sand and then tried to recover the salt by the usual processes of sedimentation, decantation or filtration followed by evaporation. To her surprise, she could recover only a small part of the salt that she had taken. The possible reasons could be
I. Salt also got evaporated along with water.
II. The quantity of salt was much more than that required to form a saturated solution.
III. The undissolved salt remained mixed with sand.
IV. The quantity of water taken was insufficient to dissolve all the salt.
AII and III only
BI and IV only
CII, III and IV only
DAll of these.
Match the column I with column II and select the correct option from the codes given :
|Column I||Column II|
|P. Chalk-water||(i) A gaseous mixture mixture|
|Q. Glucose||(ii) A solid-gas solution mixture|
|R. Fizzy drink||(iii) A homogeneous solid-liquid mixture|
|S. Smoke||(iv) A heterogeneous solid-liquid mixture|
|T. Air||(v) A gas-liquid mixture|
A P - (iii), Q - (iv), R - (v), S - (i), T - (ii)
B P - (v), Q - (iii), R - (iv), S - (ii), T - (i)
C P - (ii), Q - (i), R - (iv), S - (v), T - (iii)
D P - (iv), Q - (iii), R - (v), S - (ii), T - (i)
the correct answer is a
200 mL of water at 25°C was poured into each of the given containers P–S. The containers were then left in an open garden under the sun.
Which of the following containers will have maximum volume of water after a few hours?