The adsorption isotherm for a gas is given by the relation $x = \frac{ap}{1 + bp}$,where $x$ is moles of gas adsorbed per gram of the adsorbent,$p$ is the pressure of the gas,and $a$ and $b$ are constants. Then $x$:
- Aincreases with $p$
- Bremains unchanged with $p$
- Cdecreases with $p$
- Dincreases with $p$ at low pressures and then remains the same at high pressures
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Match the following columns correctly:
Column-$I$ Column-$II$ $A$. Tapetum $i$. Degenerates during development $B$. Intine $ii$. Resistant organic material $C$. Vegetative cell $iii$. Pollen tube $D$. Sporopollenin $iv$. Provides nourishment to pollen grains
| Column-$I$ | Column-$II$ |
| $A$. Tapetum | $i$. Degenerates during development |
| $B$. Intine | $ii$. Resistant organic material |
| $C$. Vegetative cell | $iii$. Pollen tube |
| $D$. Sporopollenin | $iv$. Provides nourishment to pollen grains |
Match the following:
| Column $I$ | Column $II$ |
| :--- | :--- |
| $A$. Hooke's law | $1$. Tangential strain |
| $B$. Shearing strain | $2$. Temporary loss of elastic property |
| $C$. Bulk strain | $3$. Elastic limit |
| $D$. Elastic fatigue | $4$. $3$ times the linear strain |
| Column $I$ | Column $II$ |
| :--- | :--- |
| $A$. Hooke's law | $1$. Tangential strain |
| $B$. Shearing strain | $2$. Temporary loss of elastic property |
| $C$. Bulk strain | $3$. Elastic limit |
| $D$. Elastic fatigue | $4$. $3$ times the linear strain |
Which of the following is a pair of amphoteric hydroxides?
The orbit of a geo-stationary satellite is circular. The time period of the satellite depends on:
$(i)$ mass of the satellite
(ii) mass of the earth
(iii) radius of the orbit
(iv) height of the satellite from the surface of the earth
Which of the following is correct?
$(i)$ mass of the satellite
(ii) mass of the earth
(iii) radius of the orbit
(iv) height of the satellite from the surface of the earth
Which of the following is correct?
$A$ long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $B$. It is then bent into a circular loop of $n$ turns. The magnetic field at the centre of the coil will be
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