List of practice Questions

To which of the groups would you assign plant lacks ovules and reproduces by means of spores ?
A typical gymnospermous plant has 8 chromosomes in leaf cells. What will be number of chromosomes in the cells of the gametophyte ?
The pigment phycoerythrin is characteristic of
During fertilization in ferns, male gamete reaches the female gamete through the agency of
Fucoxanthin is present in
In gymnosperms how many male gametes are produced by each pollen grain ?
Which of the following is known as `resurrection plant??
Most primitive members in which roots are not present, is :
Law of multiple proportions is illustrated by one of the following pairs:
The amount of calcium carbonate that reacts with 500 cc of 0.5 N hydrochloric acid is
On reduction with hydrogen, $3.6\, g$ of an oxide of metal left $3.2\, g$ of metal. If the vapour density of metal is $32$, the simplest formula of the oxide would be
Two identical metal spheres with charges $2Q$ and $-Q$ are separated by a distance. Force between them is F. They are connected by a conducting wire and then removed. Force between them now is
A charged ball $B$ hangs from a silk thread $S$, which makes an angle $\theta$ with a large charged conducting sheet $P$, as shown in the figure. The surface charge density $\sigma$ of the sheet is proportional to:
Which of the following is not the property of equipotential surfaces?
In electrolysis of dilute $ H_2SO_4$, what is liberated at anode?
A current of strength $2.5$ amp was passed through $CuSO _{4}$ solution for 6 minutes $26$ seconds. The amount of copper deposited is : (At. wt. of $Cu =63.5,1\, F =96500$ coulomb $)$
An ice-cube of density $900\, kg / m ^{3}$ is floating in water of density $1000\, kg / m ^{3}$. The percentage of volume of ice-cube outside the water is
The factor responsible for lower mercury level ina capillary tube is
Orbital is :
Which of the following is not hydrolysed?
The isoelectronic pair is
The system of equations $\alpha \, x + y + z = \alpha - 1$ $x + \alpha y + z = \alpha - 1$ $x + y + \alpha z = \alpha - 1$ has infinite solutions, if $\alpha$ is
$700\, pF$ capacitor is charged by $50\, V$ battery. Electrostatic energy is stored by it will be :
The charge on capacitors in the following figure is
A fully charged capacitor has a capacitance $'C'$. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity $s$ and mass $m$. If the temperature of the block is raised by $\Delta T$, the potential difference $V$ across the capacitance is: