List of practice Questions

Photochemical smog is formed in

Particle $A$ makes a perfectly elastic collision with another particle $B$ at rest. They fly apart in opposite directions with equal speeds. The ratio of their masses $m_A/m_B$ is

Oxidation state of iron in haemoglobin is

Occurrence of triploid (3n) primary endosperm nucleus is a characteristic feature of

Number of meiotic divisions necessary to produce 100 seeds in cyperus is

Nucleic acids are polymers of

Non-endospermous seeds are found in

Moment of inertia of a uniform rod of length $L$ and mass $M$, about an axis passing through $L/4$ from one end and perpendicular to its length is

Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at $25^\circ $C. For this process, the correct statement is

Meristematic tissue responsible for increase in girth of tree trunk is

Least quantity of urea is found in

$K_2Cr_2O_7$ in acidic medium converts into

Interfascicular cambium is

India is one of the twelve megadiversity countries with ____ of genetic resources of the world.

In wheat, the anthers are

In the preparation of $ HNO_{3}$ we get $NO$ gas by catalytic oxidaton of ammonia. The moles of $NO$ produced by the oxidation of two moles of $NH_{3}$ will be

In human beings, lungs are divided into

In $BF_3$, the $B??F$ bond length is $1.30\, ??, when $BF_3$ is allowed to be treated with $Me_3N$, it forms an adduct, $Me_3N \to BF_3$, the bond length of $B ??F$ in the adduct is

In an intrinsic semiconductor band gap is $1.2\, eV$ then ratio of number of charge carriers at $600\, K$ and $300\, K$ is

In a solid, atom $M$ occupies $ccp$ lattice and $1/3^{rd}$ of tetrahedral voids are occupied by atom $N$. Find the formula of solid formed by $M$ and $N$.

If volume of $2$ moles of an ideal gas at $540 \,K$ is $44.8$ litre, then its pressure will be

If $ 3^x = 4^{ x - 1} $ then x is equal to

Hybridisation and structure of $XeF_2$ is

How many sigma bonds are there in $P_4O_{10}$?