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Oscillations are set in a simple pendulum whose length is 2 m and mass of the bob is 2 kg. Its time period

A Is always constant
B Increases slowly
C Decreases slowly
D First increases then decreases.

In the following four groups of plant parts used as food, one member is odd one out. Select the option in which the odd member is encircled INCORRECTLY?

A Wheat, Maize, , Bajra
B Arhar, , Moong, Rajma
C , Sugarcane, Potato, Ginger
D , Coriander, Methi, Sugarcane

Refer to the given Venn diagram.

Select the correct option regarding P, Q, R, S and T.

AS could be a rose plant whereas P could be a potato plant.
BQ could be Bryophyllum and T could be strawberry.
CR could be a fern or an alga.
DQ could be spinach and P could be colocasia.

Study the given correlation.
Heat treatment : Sterilisation : : Vaccination : X
Here, X refers to

A Pasteurisation
B Immunisation
C Fertilisation
D Inoculation.

Study the given flow chart carefully and select the correct option regarding it.


AP could be nylon, R could be rubber.
BS could be rubber, Q could be jute.
CQ could be milk, P could be saffron.
DR could be cotton, S could be rubber.

Study the given table and select the incorrect option regarding P, Q, R and S.


AAnimal P is mostly found in moist or aquatic habitat.
BBody covering Q is also found in snake and crocodile.
CAnimal R is generally found in polar regions.
DAnimal S has heavy and solid bones and hindlimbs modified into wings.

Which of the following statements is incorrect regarding different layers of soil?

A Soil is made up of gravel, sand, humus, water and clay particles.
B Topsoil is rich in organic matter.
C Roots of trees may grow till subsoil.
D Bedrock contains lot of water and humus.

Four burning sticks are placed into different containers P, Q, R and S containing oxygen, carbon dioxide, nitrogen and air respectively. The observations are then noted down. Which of these observations is correct?

--------Container------------------Observation
AP------------------The glowing stick is extinguished immediately.
BQ------------------The glowing stick bursts into flame.
CR------------------The glowing stick bursts into flame.
DS------------------The glowing stick continues to glow for a while.

Mr Roshan, class 11 teacher took various solutions of equal strength and mixed them in different test tubes as shown in the figure.

He asked the students to find the incorrect statement about the given experiment.

ABlue litmus solution turns red in test tubes 1 and 3.
BTurmeric solution turns red in test tube 1.
CChina rose indicator turns dark pink in test tubes 2 and 4.
DPhenolphthalein remains colourless in test tubes 2 and 4.

Which among these children made an incorrect statement?

A
B
C
D