List of practice Questions

Chromatic aberration of lens can be corrected by

Brass is an alloy of copper (Cu) and

Biosphere is consist of:

At sea level, the value of $g$ is minimum at

Sound waves cannot propagate through vacuum but light waves can. Sound waves cannot be polarised but light waves can be.

Plasmids are single-stranded extra-chromosomal DNA. Plasmids are possessed by eukaryotic cells.

$NO_3^-$ is planar while $NH_3$ is pyramidal. $N$ in $NO_3^-$ is $sp^2$ and in $NH^3$ is $sp^3$ hybridized.

In the descending limb of loops of Henle, the urine is hypertonic, while in ascending limb of loops of Henle, the urine is hypotonic. Descending limb is impermeable to Na , while ascending limb is impermeable to HO.

Chloragogen cells of earthworm are similar to the vertebrate organ

The disorders such as alkaptonuria and phenylketonuria are refered to as

There is an irregular mating population. If the frequency of an autosomal recessive lethal gene is 0.4, then the frequency of the carriers in a population of 200 individuals is

Ora serrata is

The lining of bone marrow cavity is called

The branch of biology dealing with the process of improvement of human race by selective breeding is called

In morula stage, the cells divide without any increase in size. Zona pellucida remains undivided till cleavage is complete.

The disease, in which thick cough, stops the passage of throat and form a layer of mucous membrane, is called

Which of the following is an example of sex-linked inheritance?

Which proteolytic enzyme induces lysis of fibrin during fibrinolysis?

Which of the following plants keeps its stomata open during the night and closed during the day?

For the reaction $H_2(g) + I_2(g) \to 2HI (g)$ the change in enthalpy ($\Delta H$) will be

Which of the following compound, on reaction with $NaOH$ and $Na _{2} O _{2}$, gives yellow colour?

In the compound Lithium tetra-hydroaluminate, the ligand is

In which of the following methane is formed?

Reduction of benzoyl chloride with $ Pd - BaSO_4 $ produces

Ammonia, on reaction with excess of chlorine, gives