List of practice Questions

Deuteromycetes are known as fungi imperfecti because

Deficiency of vitamin E causes

$CsCl$ has $bcc$ arrangement. Its unit cell edge length is $400\,pm$. Its inter-ionic distance is

Consider a quadratic equation $ax^2 + bx + c = 0,$ where $2a + 3b + 6c = 0$ and let $g\left(x\right)=a \frac{x^{3}}{3}+b \frac{x^{2}}{2}+cx.$ The quadratic equation has at least one root in the interval $(0,1).$ The Rolle?? theorem is applicable to function $g(x)$ on the interval $[0,1].$

Collar bone is known as

"Cast nets" are used to catch

Cell division in plants is promoted by

But-1-ene $ { ->[{(CH_3COO)_2Hg}][{H_3O^+}] }$ ? The product in the above reaction is

The fungus which grows on dung is called

Bond dissociation energy of CH is 360 kJ/mol and CH is 620 kJ/mol. Then bond dissociation energy of C - C bond is

Blue-green algae are called cyanobacteria because they

Mycoplasma is resistant for

Beads on string like structures of A are seen in B, which further condense to form chromosomes in C stage of cell division. $\quad$$\quad$ $\quad$A$\quad$ $\quad$$\quad$$\quad$ B$\quad$$\quad$$\quad$ C

Bakelite is obtained from phenol by reacting it with

Vibrational energy of diatomic molecule corresponding to each degree of freedom is kT. For every molecule, vibrational degree of freedom is 2.

More energy is released in fusion than fission. More number of nucleons take part in fission.

Assuming the earth to be a sphere of uniform density, the acceleration due to gravity inside the earth at a distance of $r$ from the centre is proportional to

Assume that a neutron breaks into a proton and an electron. The energy released during this process is : (Mass of neutron $= 1.6725 ??10^{-27}\, kg$, Mass of proton $= 1.6725 ??10^{-27}\, kg$, Mass of electron $= 9 ??10^{-31}\, kg$ )

van-Arkel method is used to prepare samples of some metals. It involves reaction of $CO$ with metals to form volatile carbonyls which decompose on heating to give pure metal.

The presence of nitro group facilitates nucleophilic substitution reactions in aryl halides. The intermediate carbanion is stabilised due to the presence of nitro group.

The free gaseous Cr atom has six unpaired electrons. Half-filled s-orbital has greater stability.

Sodium acetate on Kolbe?? electrolysis gives methane. Methyl free radical is formed at cathode.

Sodium carbonate extract of a salt containing sulphide ions gives a violet colour with appropriate reagent. The reagent sodium nitroprusside gives violet colour due to the formation of sodium thionitroprusside.

Precipitation of soap is made by the addition of salt $(NaCl)$. Presence of common ion suppresses the dissociation of weak acid.

Phenol is more reactive than benzene towards electrophilic substitution reaction. In the case of phenol, the intermediate carbocation is more resonance stabilised.