List of practice Questions

$ 2n=16 $ in a primary spermatocyte, which is in metaphase of first meiotic division: What shall be the total number of chromatids in each of the secondary spermatocyte?
Streptomycin is obtained from
Some iron beads are embedded in wax ball which is just floating in water. The volume of ball is $18 \,cm^{3}$ and relative density of wax is $0.9$. Then mass of the iron trapped in the ball is
Satiety centres of brain is present on
Rh factor is present in
Quantasomes are present in
Phenylketonuria is an autosomal recessive disorder located on chromosome
Phenol is heated with $CHCl_{3}$ and alcoholic $KOH$ when salicylaldehyde is produced. This reaction is known as
Ornithorhynchus is an example of
One haemoglobin carries how many molecules of $O_2$?
On the set of all natural numbers $N$, which one of the following $*$ is a binary operation ?
$ {NO^+}$ ligand is
Neglecting the density of air, the terminal velocity obtained by a raindrop of radius $0.3\, mm$ falling through air of viscosity $1.8 \times 10^{-5}\, N \,s \,m ^{-2}$ will be
If $N_{0}$ represents Avogadro's number, the number of valence electrons in $4.2 \,g$ of nitride ion $\left( N ^{3-}\right)$ is
Muscular tetany can be caused by deficiency of
Most accepted theory for ascent of sap is
Malpighian tubules are
Jumping genes in maize were discovered by
Benzamide on reaction with $POCl_{3}$ gives
Which of the following is not oxidised by ozone?
Match the following. The correct answer is
During an allergic reaction, the binding of antigens to $IgE$ antibodies initiates a response, in which chemicals cause the dilation of blood vessels and a host of other physiological changes. Such chemicals are
Which of the following reagents converts both acetaldehyde and acetone to alkanes?
When NO reacts with $FeSO _{4}$, a brown coloured complex is formed. In the complex, the coordination number of Fe is $+6$.
The value of van der Waals' constant ' $a$ ' for ammonia is larger than that of nitrogen gas. Molecular weight of ammonia is smaller than nitrogen gas.