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When a compound is heated with copper(ii) oxide it is the test for:

The order of the bond angles in the following molecule is:

A bulb emits light having $\lambda =5500\stackrel{\circ }{A}$. The bulb is rated as $100$ watt and 15% of the energy is emitted as light. How many photons are emitted by the bulb per second?

The de-Broglie wavelength of a proton $(\text{charge},q=1.6\times {10}^{-19}\text{C},\text{mass},m=1.6\times {10}^{-27}\text{kg})$, accelerated through a potential difference of $1\text{kV}$, is,

PVC poloymer can be prepared by which of the monomers ?

An electrolyte

[KCET 1984; MP PET/PMT 1988]

For the reaction,

$AB\left(g\right)\rightleftharpoons A\left(g\right)+B\left(g\right)$,

We start with $1$ mole of AB and $25\%$ of which dissociates at a total pressure of $P$, $P$ is related to $K_p$ as:

If an endothermic reaction is non-spontaneous at freezing point of water and becomes feasible at its boiling point, then:

Which of the following compound(s) is/are unstable at room temperature?

The product P should be

Which of the following compound(s) have restricted rotation about C-C single bond?

The compound in which intermolecular hydrogen bonding is not possible is :

The reaction sequence(s) that would lead to o-xylene as the major product is(are)

Assuming
complete dissociation, calculate the pH of the following solutions:

(a)
0.003 M HCl (b) 0.005 M NaOH (c) 0.002 M HBr (d) 0.002 M KOH

If $KCl$ is 50% ionised in the aqueous solution what will be the van't Hoff factor of $KCl$ in the solution?