List of top Questions asked in Manipal- 2009

Huygens principle of secondary wavelets may be used to

The number of moles of $ KMnO_{4}$ reduced by one mole of $KI$ in alkaline medium is

$BOH$ is a weak base. Molar concentration of, BOH that provides a $ [OH^{-}]$ of $1.5\times 10^{-3}M$ is $[Kb(BOH)=1.5\times 10^{-5}]$

The correct order of electron affinity of halogens is

Two long straight wires are set parallel to each other. Each carries a current in the same direction and the separation between them is $2r$. The intensity of the magnetic field mid-way between them is

The path difference between the two waves $y_{1}=a_{1} \sin \left(\omega t-\frac{2 \pi x}{\lambda}\right)$ and $y_{2}=a_{2} \cos \left(\omega t-\frac{2 \pi x}{\lambda}+\phi\right)$ is

The IUPAC name of $ K[Ag(CN)_{2}]$ is

Stoma opens, when

Bryophytes resemble algae in the following aspects

What is/are true about heart wood?

Identify the group, which includes animals all of which give birth to young ones directly?

An animal,-which has both exoskeletal and endoskeletal structures is a

The chemical substances found most abundantly in the middle lamella are released into the phragmoplast by

The acidic nature of carboxylic acids $RCOOH \longrightarrow RCOO ^{-}+ H ^{+}$is due to

$t_{1 / 2}$ for a first order reaction is $10\, \min$. Starting with $10\, M$, the rate after $20\, \min$ is

Sulphonation of phenol with conc. $H _{2} SO _{4}$ at $288-293\, K$ gives

$NH_{3}$ has higher boiling point than expected because

The standard emf of a cell involving one electron charge is found to be $0.591\, V$ at $25^{\circ} C$. The equilibrium constant of the reaction is $\left(1\, F =96500\, C\, mol ^{-1}, R=8.314\, J\, K ^{-1} mol ^{-1}\right)$

A buffer solution is used in

When sucrose is heated with conc. $ HNO_{3},$ the product formed is

When propionic acid is treated with aqueous sodium bicarbonate, $ CO_{2}$ is liberated. The $C$ of $ CO_{2}$ comes from

When a stationary wave is formed then its frequency is

In a pure inductive circuit, current

For the redox reaction, $Zn + NO _{3}^{-} \longrightarrow Zn ^{2+}+ NH _{4}^{+}$ in basic medium, coefficients of $Zn , NO _{3}^{-}$, and $OH ^{-}$in the balanced equation respectively, are

Oxidation number of $S$ in $ H_{2}S_{2}O_{8}$ is