X is a clothing worn in winters, while Y is a clothing worn in summers. Select the correct option regarding it.
A X can be raincoat while Y can be a leather jacket.
B X can be made of cotton while Y can be made of wool.
C X is always made from natural fibres while Y is always made from man-made fibres.
D None of these
Digestive juices were collected from three different regions of the alimentary canal. Drops of these juices were added to wells made in an agar of starch as shown in the given figure.
After an hour, the wells were rinsed with distilled water and flooded with iodine solution. The results are given in the table.
|Colour of iodine
|Blue-black||Yellow - brown||Yellow - brown|
AWell 1 represents region that contains an enzyme pepsin that causes the breakdown of proteins into simple substances.
BWell 2 could represent region that contains an enzyme called salivary amylase.
CWell 3 could represent region that is the longest portion of alimentary canal and receives bile juice from liver and pancreatic juice from pancreas.
DAll of these
The options are placed wrongly. Well 1 cannot turn blue-black as it has protein. Well 2 should turn blue-black because it has starches. Only option c is correct. The answer is C
Which of the following statements is/are true?
I. Dark coloured cloths are preferred during night.
II. Sea breeze blows during day time.
III. There is a kink in a digital thermometer and kink contains mercury.
IV. The hotness of an object is determined by its temperature.
AI and II only
BII and III only
CI, II and IV only
DI, II, III and IV
Solve the given puzzle based on diseases and select the option that is not hidden in this puzzle.
AA disease that can spread by biotic agent.
BA disease that spreads by contaminated food or water.
CA disease that is caused due to the deficiency of energy giving food.
DA disease that is caused due to the deficiency of protective food.
The given diagram shows an experimental set-up to study osmosis. Which of the following combinations of liquids would cause liquid X to rise to the highest level in the glass tube after three hours?
|Liquid X||Liquid Y|
P, Q, R and S are drops of wax placed on a rectangular piece of metal. When the metal frame is heated at the point shown in the diagram, the drops of wax will melt. Which of the following shows the correct order in which the drops of wax will melt?
AP, Q, R and S
BP, Q, S and R
CS, R, Q and P
DS, R, P and Q
Three hydrocarbons P, Q and R have carbon which combine with hydrogen in the ratio of 3 : 2 : 1 respectively. Which of the following is incorrect about the reactions shown by P, Q and R?
A P does not undergo addition reactions.
B Both Q and R decolourise bromine water.
C Both Q and R give white precipitate with AgNO3 solution dissolved in NH4OH.
D None of these.