Refer to the given diagram showing a part of human alimentary canal and answer the following questions.
Which of the labelled structures removes most water from the undigested food?
D None of these
Which enzymes are likely to act on the baked potatoes eaten by a man, starting from the mouth as they move down the alimentary canal?
A Salivary amylase → Pancreatic amylase → Disaccharidases
B Pancreatic amylase → Salivary amylase → Lipase
C Salivary maltase → Lipase → Trypsinogen
D Salivary maltase → Pancreatic amylase → Trypsin
The given list shows the five steps needed to do a starch test but in a random order.
(i) Pluck a leaf from the plant.
(ii) Leave a potted plant out in the Sun for a few hours.
(iii) Boil the leaf in alcohol.
(iv) Put the leaf in boiling water for 2 minutes.
(v) Wash the leaf and then add a few drops of iodine solution over it.
Select the option with correct order of these steps.
A (i), (ii), (iii), (iv), (v)
B (i), (ii), (iv), (iii), (v)
C (ii), (i), (v), (iv), (iii)
D (ii), (i), (iv), (iii), (v)
Three bulbs A, B and C are connected as shown in figure. The bulbs B and C are identical. If the bulb C is fused, then
A Brightness of both bulbs A and B will increase
B Brightness of both bulbs A and B will decrease
C Brightness of the bulb A decreases and that of bulb B increases
D None of the bulbs will glow.
Which of the following statements is incorrect for the given circuit?
A The wire has no magnetic effect.
B When compass is kept near to the circuit, it will not show any deflection.
C The given circuit is incomplete because there is no source of electric energy.
D Due to battery in this circuit, electric wire behaves as a magnet.
A thermo flask is a household item that is used to keep things warm or cold for a long time. What is the use of silvered wall in thermo flask?
A To reduce the flow of heat by conduction.
B To increase the temperature by convection.
C To reflect the heat back to reduce radiation.
D To prevent the glass vessel from breaking.
When a bicycle is in motion, the force of friction exerted by the ground on the two wheels is such that it acts
A In the backward direction on the front wheel and in the forward direction on the rear wheel
B In the forward direction on the front wheel and in the backward direction on the rear wheel
C In the forward direction on both front and the rear wheels
D None of these.