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Refer to the given word grid and answer the following questions.

The safety tool used in which of the following sports is NOT hidden in the given grid?
A Cycling
B Cricket
C Swimming
D Skating

Namita finds a piece of cloth whose characteristics are as follows:
• It entraps air
• Burns with the smell of burning hair
This shows that the piece of cloth is made up of_______ .

A Synthetic fibre
B Jute fibre
C Cotton fibre
D Woollen fibre

The given apparatus is used to study the diffusion of a number of gases at the same temperature and pressure.

Which of the following pairs of gases would diffuse into the vacuum at the same speed?
[Given : Atomic mass of H = 1 u, C = 12 u, N = 14 u, S = 32 u, O = 16 u]

A NH₃ and H₂
B CO and SO₂
C CO and N₂
D NH₃ and N₂

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?

A X
B Y
C Z
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.