List of top Chemistry Questions

How many amino acids are present in insulin?
Lassaigne?s test (with silver nitrate) is commonly used to detect halogens such as chlorine, bromine and iodine but not useful to detect fluorin because the product $AgF$ formed is
How many molecules of $CO_2$ are formed when one milligram of $100\%$ pure $CaCO_3$ is treated with excess hydrochloric acid?
When 200 mL of aqueous solution of $ HCl $ (pH = 2) is mixed with 300 mL of an aqueous solution of NaOH (pH = 12), the pH of the resulting mixture is
Half-lives of a first order and a zero order reactions are same. Then, the ratio of the initial rates of first order reaction to that of the zero order reaction is
Identify the combination of compounds that undergo Aldol condensation followed by dehydration to produce but-$2$-enal
The hardest lanthanide element is
When $SO_2$ gas is passed into aqueous $Na_2CO_3$ the product(s) formed is (are)
Consider the following species 1 . $[O_2]^{2-}$ 2. $[CO]^+ $ 3. $[O_2]^+$ Among these sigma bond alone is present in
In a polysaccharide, the individual monosaccharides are linked by a:
Some carboxylic acids and their $IUPAC$ names are given below. Which of the following is not correctly matched?
The decreasing order of boiling points of alkyl halides is
The correct formula of borax is
Which of the following sets has Lewis acid behaviour for all the components?
In a first order reaction 80% of the reactant at an instant was reduced to 8% in 4606 seconds. The rate constant of the reaction is
The compound which does not lead to benzoic acid by oxidation with $KMnO_4$ is
The magnetic moment of $Ni^{2+}$ ion (At. No. of Ni. is 28) in BM unit is
The artificial sweetener containing chlorine that has the appearance and taste as that of sugar and stable at cooking temperature is
Covalent compounds have low melting points because
Identify the $T$-shaped molecule in the following
In aqueous solution, an amino acid exists as
Lactose is made of
The number of primary, secondary, tertiary and quaternary carbons in neopentane are respectively
The electronegativities of $N, C, Si$ and P are in the order
Three elements x, y and z have the respective oxidation states -2, +3 and -1 which one of the following could be possible formula of the compound form by these elements ?