Que 1:) Two 100w and 200w bulbs are used at 220v.find the amount of current drawn.
30/22A 32/22A 30/25A 35/22A
Que 2:) A resistor of 2 is connected to a cell, when magnitude of current is 1.If
another resistor of 2 is connected in series with 2 resistor , the
magnitude of current will be :
1 more than 1 less than 1 zero
Que 3:) What is the resistance of an open key?
Zero One Infinite None of these.
Que 4:) which of the following stain is used to see the stomata during temporary mount of a leaf peal?
SAFRANIN METHYLENE BLUE COTTON BLUE NONE OF THE ABOVE
Que 5:) what is the ph of water when mixed with NaCl?
7 below 7 above 7 none of these
Que 6:) The cellular component not seen while observing slide of an onion peel under a compound microscope
Chromosomes Cell wall Nucleous cytoplasm
Que 7:) A student is given a permanent slide showing binary fission in Amoeba. The following are the steps in focussing the object under the microscope.
(i) Place the slide on the stage; look through the eye piece and adjust the mirror and diaphragm to get even illumination.
(ii) Look through the eye piece and raise the objective using coarse adjustment
until the object is focused.
(iii)Make the focus sharp with the help of fine adjustment.
(iv)Look through the eye piece and move the slide until the object is visible.
The proper sequence of steps is
(i), (iii), (iv), (ii). (ii), (iii), (iv), (i). (iv), (iii), (ii), (i). (i), (iv), (ii), (iii).
Que 8:) A part of de-starched leaf of a potted plant was covered with black paper strips on both sides and the plant was kept in sunlight for 8 hours. The leaf was then tested with iodine after boiling it in alcohol. Only the uncovered part of the leaf turned blue black. The inference is that
CO2 is necessary for photosynthesis. light is necessary for photosynthesis. chlorophyll is necessary for photosynthesis. water is necessary for photosynthesis
Que 9:) 10 mL of freshly prepared iron sulphate was taken in each of four test tubes.
Strips of copper, iron, zinc and aluminum were introduced, each metal in a
different test tube. A black residue was obtained in two of them. The right pair of metals forming the precipitates is
copper and zinc aluminum and copper iron and aluminum zinc and aluminum
Que 10:) Students A, B and C were given five raisins each of equal weight. The raisins
were soaked in distilled water at room temperature. A removed the raisins after
20 minutes, B after two hours and C after 40 minutes. If PA, PB and PC denote
percentage absorption of water obtained by students A, B and C respectively,
then
PA > PB > PC PA < PB < PC PA < PB > PC PA = PB = PC
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