List of top Chemistry Questions

An alkene \("A"\) on reaction with \(O_3\) and \(Zn - H_2{0}\) given propanone and ethanol in equimolar ratio. Addition of \(HCI\) to alkene \("A"\) gives. \("B"\)as the major product. The structure of product \("B"\) is : 
Which one is malachite from the following?
The most suitable reagent for the following conversion, is:
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Which of the following is an amphoteric hydroxide?
Under isothermal condition, a gas at 300 K expands from 0.1 L. to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is: [Given that 1 L bar=100J]
Which will make basic buffer?
Which of the following species is not stable ?
The manganate and permanganate ions are tetrahedral, due to:
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :
A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:
The value of x in the following chemical reaction is
\(C_3H_8 + xO_2 \rightarrow YCO_2 + zH_2O\)
Compounds with spin-only magnetic moment equivalent to five unpaired electrons are
If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
The temperature of $32^{\circ}C$ is equivalent to
Which among the following is correct for electrolysis of brine solution ?
The combining ratios of hydrogen and oxygen in water and hydrogen peroxide are $1 : 8$ and $1 : 16$ . Which law is illustrated in this example ?
"The mass and energy both are conserved in an isolated system", is the statement of
The number of pi-bonds present in benzoic acid molecule are
$9$ gram anhydrous oxalic acid (mol. wt. = $90$) was dissolved in $9.9$ moles of water. If vapour pressure of pure water is $p_{1}^\circ 1$ the vapour pressure of solution is
The elevation in boiling point of $0.25$ molal aqueous solution of a substance is $(K_b = 0.52\, K\, kg\, mol^{-1})$
Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
The rule which describes the electron distribution in degenerate orbitals of an atom is
The possible I values for a given n value are
Which of the following set of quantum numbers is not correct?
The correct order of energies for the electromagnetic spectrum is