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Rubina kept some naphthalene balls in her almirah. After few days, she observed that their size has decreased.
The change that occurred in size of naphthalene balls is similar to the change in state of matter taking place when ___________.

AIce-cream is put on a table
BWater is boiled and vapours are formed
CCurd is made from milk
DA camphor block is heated

A river supports a large number of fish in its water. A new chemical factory was established near this river and the fish population was seen to decrease with time.
Which point (P, Q or R) on the graph represents the time when factory was established?


AP
BQ
CR
DEither Q or R

Mimicry is an adaptation for protection in _________.

AChameleon
BPolar bear
CHawk moth caterpillar
DTortoise

In which of the following agricultural practices, the nutrient requirements of one crop are fulfilled by the other crop?


A
B
C
D Both A and C

Rohan father said, "Stay at home as son of my son-in-law will come to our home to meet us". Rohan will meet with his _____.

ACousin
BUncle
CNephew
DBrother

Which of these organ systems gives shape and support to our body and protects the important organs of the body such as lungs, brain, heart, etc.?

A
B
C
D

Copper sulphate solution was kept in a bottle made up of iron. After few days, some holes were developed on the iron bottle. This is because

Acopper is more reactive than iron
Bof rusting of iron bottle
Ciron is more reactive than copper, it displaces copper from copper sulphate solution
Dnone of these.

If the given clock is 40 minutes fast, than the correct time after 2 hours will be _______.


A 5 : 55
B 6 : 35
C6 : 50
D 7 : 10

Producers are an important part of the food chain. Which of the following are producers?

AAnimals
BHumans
CInsects
DPlants

The given diagrams show the shapes of the Moon on different nights.

Which one of the following diagrams shows the correct shape of the Moon on 22^nd January?

A
B
C
D