List of top Chemistry Questions

Which of the following hexoses will form the same osazone when treated with excess phenyl-hydrazine?
Which of the following is/are true? (A) Sucrose is a non-reducing sugar. (B) Glucose is oxidised by bromine water. (C) Glucose rotates plane polarized light in clockwise $ \, \, \, $direction. (D) Fructose is oxidised by bromine water. Select the correct answer using the coded given below.
Which of the following pairs can be distinguished by sodium hypoiodite?
Which of the following transition metals of 3 series has the lowest melting point?
Which among the following is not an antibiotic?
When potassium is reacted with water, which compound $(S)$ is are formed preferentially?
When $MnO_2$ is fused with $KOH$ and $KNO_3$, a coloured compound is formed. Choose the right compound with the appropriate colour
When BH is heated with NH, the final product is
When a mixture of benzaldehyde and acetophenone is treated with dilute $NaOH$ at $293\, K$, it forms
What is the IUPAC official name of element with atomic number 110?
The various types of hydrides and examples of each type are given below : Choose the correct matching from the codes given below :
The reaction, is an example of
The primary and secondary valencies of chromium in the complex ion, $dichlorodioxalatochromium \,(III)$, are respectively
The polymeric hydride is
The photochemical smog can be suppressed by
The pH of normal rain water is
The product formed in the following reaction is: $ C{{H}_{3}}CH(C{{H}_{3}})CH=C{{H}_{2}}+HBr $ $ \xrightarrow{{}}product: $
What structural feature distinguishes glycine from other natural $ \alpha $ -aminoacids?
The most stable +2 oxidation state is exhibited by:
The monomer of polystyrene is
The molecule that contains only $sp^2$ hybrid carbon atoms is
The minerals involved in photolysis of water are (a)$\quad$ Manganese$\quad$$\quad$ (b)$\quad$ Calcium (c) $\quad$Magnesium $\quad$$\quad$(d)$\quad$ Chloride.
The mass of ${CaCO_3}$ required to react completely with 20 mL of 1.0M HCl as per the reaction, ${CaCO_3 + 2HCl -> CaCl2 + CO_2 + H_2O}$ is (At. wt: Ca = 40, C = 12, O = 16).
The maximum oxidation state exhibited by actinide ions is
The efficiency of enzyme catalysis is due to its capacity to