Short Answer TypeWhat is observed when a solution of sodium sulphate is added to a solution of barium chloride taken in a test tube? Write an equation for the chemical reaction involved and name the type of reaction in this case.
The values of current (I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are as given below:
| V (volts) | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 | 5.0 |
| 1 (amperes) | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.8 | 1.0 |
Plot a graph between current (I) and Potential difference (V) and determine the resistance (R) of the resistor.
List the steps of preparation of temporary mount of a leaf peel to observe stomata.
The following are the steps of preparation of temporary amount of a leaf peel to observe stomata.
(i) Remove a healthy leaf from the potted plant.
(ii) Remove a part of the peel from the lower surface of the leaf by folding the leaf over and gently pulling the peel apart using forceps.
(iii) Put a few drops of safranin stain in a watch glass.
(iv) After 2-3 minutes take out the peel and place it on a clean glass slide.
(v) Put a drop of glycerin over the peel and place a clean coverslip gently over it.
(vi) Remove the excess stain and glycerin with the help of blotting paper.
(vii) Observe the slide under the low-power and high-power magnifications of the compound microscope.
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