List of top Chemistry Questions

Nucleic acids are polymers of
Methylene blue, from its aqueous solution, is adsorbed on activated charcoal at $25^\circ $C. For this process, the correct statement is
$K_2Cr_2O_7$ in acidic medium converts into
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 $BF_3$, 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 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
Hybridisation and structure of $XeF_2$ is
How many sigma bonds are there in $P_4O_{10}$?
$ { ->[{(HI (excess)}][{\Delta}] }$
Hair cream is
Electrode potential of hydrogen electrode is $18\, mV,$ then $[H^+]$ is
The one which is least basic is
"No two electrons in an atom will have all the four quantum numbers same". The statement is known as
Blue colour of the sky is due to
The highest oxidation state of $ Os$ is $+ 8$. Osmium is a $5$ $d$-block element.
Phenol forms $2,4, 6$-tribromophenol on treatment with $Br_{2}$ in carbon disulphide at $273 \,K$. Bromine polarises in carbon disulphide.
On adding zinc pieces to aqueous $FeCl_{3}$ solution, colour changes from deep yellow to light green. Aqueous $FeCl_{3}$ is acidic and on adding $Zn$, nascent hydrogen is produced which reduces deep yellow $FeCl_{3}$ solution to light green $FeCl_{2}$solution.
Number of radial and angular nodes for $3p$-orbital are 1, 1 respectively. Number of radial and angular nodes depends only on principal quantum number.
Formic acid reduces Tollen?? reagent. Compounds containing $??HO$ group reduce Tollen?? reagent.
Cu is stronger reducing agent than $H_2$. E$^{\circ}$ of $Cu^{2+}/Cu$ is negative.
Bond dissociation energy is $F_2 > Cl_2$. $Cl_2$ has more electronic repulsion than $F_2$.
Which of the following is not an ore of iron?
Arrange the following compounds in increasing order of reactivity towards nucleophilic addition reaction. (I)$C_6H_5COCH_3$ (II) $CH_3 CO-C_2H_5$ (III)$C_6H_5CHO$ (IV) $Cl-CH_2 - CHO$
Electron affinity is positive, when