We should carry_________ whenever we go out, on that day, when the newspaper shows the given symbol in weather report.
D Both (A) and (C)
The terminals of a battery are joined by a length of resistance wire. Which change, on its own will decrease the current through the battery?
AConnecting an identical wire in series with the first one.
BCovering the wire with plastic insulation.
CUsing a shorter wire of the same material and same thickness.
DUsing a thicker wire of the same material and same length.
Match column I with column II and select the correct option from the given codes.
AP - (i), Q - (ii), R - (iii), S - (iv)
BP - (ii), Q - (iii), R - (iv), S - (i)
CP - (iv), Q - (iii), R - (ii), S - (i)
DP - (i), Q - (iii), R - (ii), S - (iv)
Four strips are cut from a fresh potato. The length of each strip is measured. One strip is placed in water and others in different concentrations of sugar solution. After an hour, the strips were measured again. The results are shown in the table. Which of the liquids P, Q, R and S is water?
our trainer said that the correct answer is.....[OPT. A]....SO please give the correct answer.....
Ans 1: (Master Answer)
Sugar solution is hypertonic to cell sap of potato, whereas water acts as a hypotonic solution to it. When the potato strip is placed in water, its cells will gain water by osmosis, resulting in increase in size of potato strip.
When the potato strips are put in sugar solution of different concentrations, the cells will lose water resulting in decrease in the size of strip. As only potato strip placed in liquid ‘Q’ shows increase in length, this shows that liquid ‘Q’ is water.
If 'white' is called 'black', 'black' is called 'purple' and 'purple' is called 'red', then what is the color of milk?
white->black->purple->red ... so milk white = red . Please explain milk white = black answer given