List of practice Questions

The plants having vascular tissue but lacking seeds are placed under
The order of basicity of the compounds is
The order of osmotic pressure of three equimolar aqueous solutions of $CaCl_{2}, NaCl$ and $C_{6}H_{12}O_{6}$ (glucose) is
The number of common tangents of the circles given by $x^2+y^2-8x-2y +1 = 0$ and $x^2+y^2 + 6x+8y = 0$ is
The nucleus is separated from surrounding cytoplasm by a nuclear membrane, which is
The molecule having smallest bond angle is :
The integral of $\frac{x^{2}-x}{x^{3}-x^{2}+x-1}$ w.r.t. x is
The half life of a radioactive nucleus is $50$ days. The time interval (t$_2-t_1$) between the time t$_2$ when $\frac{2}{3}$ ot it has decayed and the time $t_1$, when $\frac{1}{3}$ of it had decayed is
The given figure is the diagrammatic representation of the E. coli vector pBR 322. Which one of the given options correctly identifies its certain component(s)?
The geometry of ammonium ion is
The frequency order for $X-rays (A)$, $\gamma$-rays (B), $UV \,rays\, (C)$ is
The formation of molecular complex $BF_3 ??NH_3$ results in a change in hybridization of boron
The following sets of quantum numbers represent four electrons in an atom. (i) $n=4, \,l= 1$ $\quad$$\quad$(ii) $n=4,\, l=0$ (iii) $n = 3,\,l=2$$\quad$$\quad$ (iv) $n = 3,\,l= 1$ The sequence representing increasing order of energy, is
The first mammal clone "Dolly" was created by
The first stable compound formed in Krebs' cycle is
The first clinical gene therapy was given for treating
The figure shows an experimental plot discharging of a capacitor in an $RC$ circuit. The time constant $\tau$ of this circuit lies between :
The external diameter of a $314\, m$ long copper tube is $1.2\, cm$ and the internal diameter is $1 \,cm$. Calculate its resistance if the specific resistance of copper is $ 2.2\times {{10}^{-8}}\Omega -m $
The equivalent inductance of two inductors is $2.4 \,H$ when connected in parallel and $10 \,H$ when connected in series. What is the value of inductances of the individual inductors?
The elements of xylem tissue that stores tannins are
The element that does not show catenation among the following $p$-block elements is
The electron affinity of chlorine is $3.7\, eV. \,1$ gram of chlorine is completely converted to $Cl^-$ ion in a gaseous state. $(1\, eV = 23.06\, kcal\, mol^{-1})$. Energy released in the process is
The electrode potential E$_{\left(\frac{Zn^{2+}}{Zn}\right)}$ of a zinc electrode at 25$^{\circ}$C with an aqueous solution of 0.1M $ZnSO_4$ is (E$^{\circ}$$_{\left(\frac{Zn^{2+}}{Zn}\right)}$ = -0.76 V. Assume $\frac{2.303RT}{F} =$ 0.06 at 298 K)
The electric force between two point charges separated by a certain distance d in air is F.The distance at which they should be placed in a medium of relative permittivity k so that the force remain the same is
The dominant generation in pteridophytes is