List of practice Questions

A $50\, Hz$ AC source of $20$ volts is connected across $R$ and $C$ as shown in figure. The voltage across $R$ is $12$ volt. The voltage across $C$ is
Alkyl halides react with dialkyl copper reagents to give
The cooling in refrigerator is due to
The certain amount of current when flowing in a properly set tangent galvanometer, produces a deflection of $45^{\circ} $ . The current be reduced by a factor of $ \sqrt{3} $ , the deflection would
The edible part of the sweet potato is a modified:
Which of the following statements is not correct for species ?
Hailstone at $0^{\circ}C $ falls from a height of $1\, km$ on an insulating surface converting whole of its kinetic energy into heat. What part of it will melt? $ (g=10\,m/s^{2})$ (Latent heat of ice $ =3.34\times 10^{5}J/kg$)
If $x dy = y(dx+y dy),y(1)=1$ and $y(x) > 0$. Then, $y(-3)$ is equal to
In which part of mitochondria does ATP synthesis occur?
The surface of the Endoplasmic Reticulum (ER) is covered with :
Which one has no intermediate host?
Leucopenia is the condition where
Which of the following gives propyne on hydrolysis?
Auxospore forrmation is seen in
An $ \alpha - $ particle of mass m suffers one dimensional elastic collision with a nucleus of unknown mass. After the collision the $ \alpha - $ particle is scattered directly backwards losing 75% of its kinetic energy. The mass of the unknown nucleus is:
In a resonance pipe the first and second resonances are obtained at depths $ 22.7\,cm $ and $ 70.2\,cm $ respectively. What will be the end correction?
Callus is
$HCl$ is secreted by :
Inner lining of blood vessels is formed by:
Aluminium oxide may be electrolysed at 1000 $^{\circ}$C to furnish aluminium metal (Atomic mass = 27 amu: 1 faraday = 96,500 Coulombs). The cathode reaction is $Al^{3+} + 3e^- \to Al^{\circ}$ To prepare 5.12 kg of aluminium metal by this method would require :
The salt soluble in excess of sodium hydroxide solution is
Concentrated nitric acid with aluminium gives
Common feature of Euglena, Amoeba, Tryanosoma and Entamoeba is
If a is the degree of dissociation of $Na_2SO_4$, the van?t Hoff factor (i) used for calculating the molecular mass is :
The volume of a colloidal particle, $V_C$ as compared to the volume of a solute particle in a true solution $V_S$, could be :