List of top Chemistry Questions

The conformations of n-butane, commonly known as eclipsed, gauche and anti-conformations can be interconverted by
Identify the equation in which change in enthalpy is equal to change in internal energy
The number of $\sigma$ and $\pi$-bonds in $2$-formylbenzoic acid are respectively
What is the density of water vapour at boiling point of water?
Standard hydrogen electrode $(SHE)$ is a
Limestone is used as a flux in the extraction of
How many total constituent particles are present in simple cubic unit cell ?
In the reaction, $ H_{2}O_{2} (aq) \ce{->[I^{-}(aq)]} H_{2}O(I)+\frac{1}{2} O_{2}(g)$ iodide ion acts as
According to Werner?s theory the geometry of the complex is determined by
Veronal is used as a/an
How many isomers are possible for an alkane having molecular formula $C_{5}H_{12}$?
The volume of $1$ mole of any pure gas at standard temperature and pressure is always equal to
Which of the following salts is coloured salt before heating?
The metal d-orbitals that are directly facing the ligands in $ {K_3[Co(CN)_6]}$ are :
The correct order of acid strength of the following carboxylic acids is
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Glucose does not give 2,4-DNP test. 
Reason: Glucose exists in cyclic hemiacetal form.
In the light of the above statements, choose the correct answer from the options given below
$ {B2H6}$ reacts with $ {(CH3)3N}$ to produce
Match the column I and II
Column IColumn II
(i)Elaioplast(a)Storage of starch
(ii)Aleuroplast(b)Storage of fat
(iii)Amyloplast(c)Storage of protein
(iv)Chromoplast(d)Colored pigments
Calculate Molarity of a 63% w/w $HNO_3$ solution if density is 5.4 g/mL :
The Henry�s law constant for $O_2$ dissolved in water is $4.34 \times 10^4$ atm at certain temperature. If the partial pressure of $O_2$ in a gas mixture that is in equilibrium with water is 0.434 atm, what is the mole fraction of $O_2$ in the solution?
Formula for half life of a zero order reaction is:
In the decay sequence, ${^{238}_{92}U->[-x_1] ^{234}_{90}Th->[-x_2] ^{234}_{91}Pa ->[-x_3]^{234}Z->[^{-x_4}] ^{230}_{90}Th}$ $x_1,x_2, x_3$ and $x_4$ are particles/radiation emitted by the respective isotopes. The correct option(s) is(are)
The decomposition of $NH_3$ on platinum surface is zero order reaction. The rates of production of $N_2$ and $H_2$ are respectively $(k = 2.5 \times 10^{-4} mol\, L^{-1} s^{-1})$
The rate constants for a reaction at $400\, K$ and $500\, K$ are $2.60 \times 10^{-5} s ^{-1}$ and $2.60 \times 10^{-3} s ^{-1}$ respectively. The activation energy of the reaction in $kJ\, mol ^{-1}$ is
The hydroxyl ion concentration in a solution having $ pH $ value $ 3 $ will be