SAT (Stage-1) M...

The elements given below represent the period II of the periodic table:

Identify the elements with the largest and the smallest atomic radii.

Which of the following categories of reactions is/are always exothermic?

A. Decomposition
B. Neutralization
C. Combination
D. Double displacement

When a colourless aqueous solution of a substance 'X' is added to an aqueous solution of lead(II) nitrate which is also colourless, a chemical reaction occurred which was indicated by the formation of a yellow precipitate. Which of the following could be the substance 'X'?

What is the name given to the plants produced from cross-pollination of parent plants?

A cross between a tall pea plant (TT) and a short pea plant (tt) resulted in progeny that were all tall plants because

The characters transmitted from parents to offspring are present in

Humans cannot digest cellulose whereas cows can do so because

A starving man first consumes his

Some people suffer from bloating and flatulence after ingesting sucrose because it cannot be digested. The enzyme deficient in these people is

Which of the following statements is/are false?

a. An ecosystem is a self-contained unit of living things and their non-living environment.
b. An ecosystem needs the input of sunlight energy for its functioning.
c. Abiotic components of an ecosystem mean living components and biotic components mean non-living components.

In the following food chain, which of the organisms are phytoplanktons?

Algae → Protozoa → Small fish → Big fish → Human beings

If hydra is cut into two parts, it does not die because _________.