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Arun categorised different types of fibres on the basis of their sources. He made three groups consisting of three fibres each. By mistake he placed one wrong fibre in each group. Identify the wrong member in each group and select the correct option.
Group I : Cotton, Jute, Acrylic
Group II : Wool, Polyester, Silk
Group III : Nylon, Rayon, Linen

AAcrylic of group I should be interchanged with linen of group III.
BPolyester of group II should be interchanged with rayon of group III.
CCotton of group I should be replaced with hemp.
DLinen of group III should be replaced with coir.

Kartik performed the following experiment by taking few solutions and phenolphthalein indicator. Identify p, q and r in his experiment.


A p → Acid, q → Acid, r → Base
B p → Base, q → Acid, r → Base
C p → Base, q → Base, r → Acid
D p → Base, q → Acid, r → Acid

Most crops require a lot of nitrogen to synthesise the proteins. The bacterium Rhizobium helps some of the crops to get nitrogen. Which of the following statements is incorrect for Rhizobium?

A It converts atmospheric nitrogen into a soluble form that the plants can absorb from soil.
B It can make its own food.
C It lives in the root nodules of leguminous plants like gram, pea, moong etc.
D Leguminous plants provide food and shelter to Rhizobium.

The properties of three substances are given below.

Consider the following statements (I-IV) and fill in the blanks by choosing the appropriate option.

I. An antacid such as P is used to cure indigestion.
II. Lime water contains Q , which turns milky with carbon dioxide.
III. Soap solution is basic due to presence of R . It turns turmeric stain of shirt to red.
IV. Baking soda is S which reacts with vinegar to evolve carbon dioxide gas.

Select a figure from the options which when placed in the blank space of the given figure would complete the pattern.

A
B
C
D

Refer to the given figures showing different types of bird's nests and answer the questions that follow.

1. Which of these nests belongs to a bird that uses its beak like a needle to sew its nest?
2. Which of these nests belongs to a bird that has two toes in the front and two toes at the back?

A1-d, 2-e
B1-g, 2-d
C1-f, 2-g
D1-d, 2-f

______ is an example of pulses.
A
B
C
D

Select the odd one out on the basis of number of seeds present in it.

A
B
C
D

Which of the following is a physical change?

ACooking of food
BTearing of paper
CBurning of wood
DGermination of seed