List of top Questions asked in MHT CET

Palladised charcoal with quinoline is known as
Which of the following is NOT a principle of green chemistry?
Aldehydes and Ketones can be converted to alkanes using
(A). LiAlH\({}_{4}\)/ H\({}_{3}\)O\({}^{+}\)
(B). Zn-Hg/ conc\({}^{n}\) HCl
(C). NH\({}_{2}\)-NH\({}_{2}\) / KOH in ethylene glycol
(D). K\({}_{2}\)Cr\({}_{2}\)O\({}_{7}\)/ dil.H\({}_{2}\)SO\({}_{4}\)
An organic halogen compound which is used as refrigerant in refrigerators and air conditioners is
Consider the following compounds :
\(\underline{\text{K}}\text{O}_{2},\text{H}_{2}\underline{\text{O}}_{2}\) and \(\text{H}_{2}\underline{\text{S}}\text{O}_{4}\)
The oxidation state of the underlined elements in them are respectively,
Calculate the solubility product of \(\text{Ca(OH)}_{2}\) if solubility of it is \(\sqrt{3}\) mol \(\text{dm}^{-3}\) at \(25^{\circ }\text{C}\).
Which from the following is Lewis base?
Identify the oxide used as \(\text{CO}_{2}\) adsorbent and oxygen generator from following.
What amount of NaOH should be dissolved in a \(500\) mL solution, so that the \(\text{p}^{\text{H}}\) of solution is \(12\) at \(298\) K ?
What is the enthalpy of formation of HF if bond enthalpies of H-H, F-F and H-F bonds are \(434\) kJ/mol, \(158\) kJ/mol and \(565\) kJ/mol respectively. ?
How many total number of s and p electrons are respectively present in \(\text{Cl}^{-}\) ?
Which of the following molecules shows \(\text{sp}^{3}\text{d}\) hybridisation?
Calculate \(\Delta H\) for a reaction, \(2X_{(g)}+Y_{(g)}\rightarrow 2Z_{(g)}\) at \(298\) K if \(\Delta U=-10.5\) kJ and \(R=8.314\ \text{J K}^{-1}\ \text{mol}^{-1}\).
The relationship between \(\Delta H\) and \(\Delta U\) for the reaction, \(\text{PCl}_{3}(g)+\text{Cl}_{2}(g)\rightarrow \text{PCl}_{5}(g)\) is given as
The volume occupied by a given mass of gas at \(298\) K is \(35\) mL at \(1\) atmospheric pressure. Calculate the volume of the gas if pressure is decreased to \(0.75\) atmosphere at constant temperature.
For an n-type semiconductor, the relation between the number density '\(n_{h}\)' and '\(n_{e}\)' is
The wavelength of radiation emitted is '\(\lambda\)' when an electron jumps from second to first orbit of hydrogen atom. For the electron to jump from third to first orbit of hydrogen atom, the wavelength of radiation emitted will be
Out of the following what is used to detect the intensity of light ?
A coordination complex contains \(2.6\ \%\) of Mg. Find the number of Mg atoms in \(5.0\) g of this sample.
(gram atomic mass of Mg \(=24\) g )
For two inputs A and B and output Y, the Boolean expression for NOR gate is
In the Young's double slit experiment, the intensity of light at a point on the screen where the path difference is \(\lambda\) is 'K', \(\lambda\) being the wavelength of light used. The intensity at a point where path difference is \(\frac{\lambda }{6}\) will be \(\left[\cos \left(\frac{\pi }{6}\right)=\frac{\sqrt{3}}{2}\right]\)
The Brewster's angle for the air-glass interface is \((54.74)^{\circ }\). If a ray of light going from air to glass strikes at an angle of incidence \(45^{\circ }\), then the angle of refraction is
\(\left(\tan (54.74)^{\circ }=\sqrt{2},\,\sin 45=1/\sqrt{2}\right)\)
A circular beam of light having diameter 'd' falls on a plane liquid surface from air. The angle of incidence is \(45^{\circ }\) and refractive index of liquid is 'n'. The diameter of the refracted beam is
\(\left(\cos 45^{0}=1/\sqrt{2},\ \sin 45^{0}=1/\sqrt{2}\right)\)
The wavelength \(\lambda _{e}\) of an electron and \(\lambda _{P}\) of a photon of same energy E are related as
An electron of mass m and charge e initially at rest gets accelerated by a constant electric field E. The de-Broglie wavelength of the electron at time t is (h = Planck's constant)