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Read the given statements regarding the various types of reactions.
I. Reaction of sodium chloride with silver nitrate is an example of neutralisation reaction.
II. The process of depositing a layer of chromium on iron is called galvanisation.
III. When baking soda is mixed with lemon juice, bubbles are formed due to evolution of CO₂ gas.
IV. Hydrogen gas is evolved when vinegar is added to baking soda.
Select the correct option from the following.

Consider four identical bulbs B₁, B₂, B₃ and B₄, these are connected in the manner as shown in the given figure. When one of the four bulbs (B₃) has blown off, then consider the following statements.

Statement 1 : Brightness of the bulbs B₁, B₂ and B₄ increases.
Statement 2 : Voltage across B₁ and B₄ will become equal.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DBoth statements 1 and 2 are false.

A heater, a fan and a bulb are connected to the 15 V battery as shown in the given figure.

The fan with a resistance R has a potential difference of 6 V across it and a current of 3 A is flowing through the fan. The bulb has a current of 2 A flowing through it. Select the correct statement(s).
I. The voltage across the bulb is 6 V and its resistance is 2R.
II. The voltage across the bulb is 6 V and its resistance is ³⁄₂ R.
III. The voltage across the heater is 9 V and its resistance is 2R.
IV. The voltage across the heater is 9 V and its resistance is ⁹⁄₁₀ R.

AI only
BII and IV only
CIII and IV only
DI and II only

A person stands still while a plane mirror is wheeled away from him at the rate of 2 ms^–1 as shown in the given figure. How fast does the person see his image moving away?


A1 m s^–1
B2 m s^–1
C4 m s^–1
D8 m s^–1

Read the given paragraph where few words have been italicised and select the correct statement regarding them. The flat green portion of the leaf is called petiole. Arrangement of veins on leaf is called venation. Leaf of lemon plant has parallel venation while leaf of sugarcane plant has reticulate venation.

APetiole should be replaced with leaf blade.
BVenation should not be changed as it is correctly mentioned.
CParallel and reticulate should be interchanged.
DAll of these

Study the classification table and fill in the boxes from the given options.


A(i) - Metals, (ii) - Wool, (iii) - Copper, (iv) - Once alive
B(i) - Wool, (ii) - Once alive (iii) - Copper, (iv) - Metals
C(i) - Once alive, (ii) - Metals (iii) - Wool, (iv) - Copper
D(i) - Once alive, (ii) - Copper (iii) - Wool, (iv) - Metals

X is a stem modified to store food, while Y is a stem modified to make food. X and Y are respectively

ACactus and carrot
BOnion and potato
CGinger and onion
DPotato and cactus.

Read the following statements regarding wastewater treatment plant. Select the option that correctly completes any two statements.
(i) ________ remove large solid materials from the wastewater and allow it to go into an ________.
(ii) The solid waste called ________ sinks slowly at the bottom and is continuously removed by ________.
(iii) The clarified water is passed into ________ which contains aerobic bacteria.
(iv) The suspended microbes settle down at the bottom as ________ and ________ is used as manure.

A(i) - Bar screens, Aeration tank; (ii) Sludge, Skimmer
B(ii) - Sludge, Scrapers; (iii) Aeration tank
C(iii) - Grit and sand removal tank; (iv) - Dried sludge, Activated sludge
D(i) - Bar screens, Aeration tank; (iv) - Activated sludge, Dried sludge

Which of the following statements is/are correct?
(i) The hump of camel is used for storing water.
(ii) Red-eyed frog has developed sticky pads on its feet to help it climb trees.
(iii) The large beak of toucan helps it to reach the fruits and nuts which are not accessible to other animals.
(iv) Large and wide paws of polar bear help it to walk easily on snow.

A(i) only
B(i), (ii) and (iii) only
C(ii), (iii) and (iv) only
D(i) and (ii) only

Match column I with respective distance/displacement(x) versus time (t) graphs in column II and select the correct option from the given codes.


A(i) – (r), (ii) – (q), (iii) – (p), (iv) – (s)
B(i) – (q), (ii) – (r), (iii) – (s), (iv) – (p)
C(i) – (s), (ii) – (q), (iii) – (p), (iv) – (r)
D(i) – (q), (ii) – (r), (iii) – (p), (iv) – (s)