List of top Chemistry Questions

Chiral complex from the following is

In which of the following reactions the hydrogen peroxide acts as a reducing agent?

The magnetic moment of a transition metal compound has been calculated to be 3.87 B.M. The metal ion is

Identify the product formed (A and E)

Compound $( X )$ undergoes following sequence of reactions to give the Lactone $( Y )$

Identify $X , Y$ and $Z$ in the following reaction (Equation not balanced) $ClO + NO _2 \rightarrow \underline{ X } \stackrel{ H _2 O }{\longrightarrow} \underline{ Y }+\underline{Z}$

What is the purpose of adding gypsum to cement?

$Ka _1, Ka _2$ and $Ka _3$ are the respective ionization constants for the following reactions (a), (b) and (c)
(a) $H _2 C _2 O _4 \rightleftharpoons H ^{+}+ HC _2 O _4^{-}$
(b) $HC _2 O _4^{-} \rightleftharpoons H ^{+}+ HC _2 O _4^{2-}$
(c) $H _2 C _2 O _4 \rightleftharpoons 2 H ^{+}+ C _2 O _4^{2-}$
The relationship between $K _{ a _1}, K _{ a _2}$ and $K _{ a _3}$ is given as

Out of seven crystal systems, how many have face-centred unit cells?

The given unit cell belongs to the type:

The decomposition products of [FeO$_4$]$^{2-}$ are:

1 L of 0.1 M HCl is added to 1 L of 0.1 M HA (weak acid) solution. To this solution, 16 g of solid NaOH is added. What is the pOH value of resultant solution? (Given molar mass of NaOH is 40 g/mol, $ \log 2 = 0.3, \log 4 = 0.6 $)

The plot of $ \log \frac{x}{m} $ (y-axis) and $ \log p(x) $ (x-axis) is a straight line inclined at an angle of 45°. When the intercept, $ K $ is 10 and pressure is 0.3 atm, the amount of solute in grams adsorbed per gram of adsorbent (log3 = 0.4771) is:

Observe the following species \[ \text{AlCl}_3, \, \text{NH}_3, \, \text{H}^+, \, \text{Co}^{3+}, \, \text{OH}^-, \, \text{H}\text{Mg}^{2+}, \, \text{BF}_3, \, \text{Cl}^- \] How many Lewis bases are present in the above list?

Which of the following types of isomerism is exhibited by [Co(NH$_3$)$_5$(NO$_2$)] (NO$_3$)$_2$ i. Optical ii. Linkage iii. Ionization iv. Coordination

Among the following, the correctly matched pair is:

In the above reaction electrophile is substituted at meta position only, due to

I. Electron density is more at ortho & para position
II. Electron density is relatively less at ortho & para position
III. Electron density is less at meta position
IV. Electron density is relatively more at meta position Correct answer is

How many asymmetric carbons are present in the following molecule? HOCH$_2$CH(Br)CH(Br)CH$_2$OH

Fittig reaction is:

Observe the following species: AlCl$_3$, NH$_3$, H$^+$, Co$^{3+}$, $^-$OH, Mg$^{2+}$, BF$_3$, Cl$^-$ How many Lewis acids are present in the above list?

The correct order of bond enthalpy of given molecules is

The first ionization enthalpies of Na, Mg and Si are respectively 496, 737 and 786 kJ mol⁻¹. What would be the first ionization enthalpy of Al in kJ mol⁻¹?

In the below reaction, geometry of BCl3, X respectively are $\text{BC}_{3} + \text{NH}_{3} \rightarrow X$

Which of the following are homopolymers?

The bond angle is maximum in which of the following molecules?