MCQ
A beaker is completely filled with water at $4°C$. It will overflow if
- AHeated above $4°C$
- BCooled below $4°C$
- ✓Both heated and cooled above and below $4°C$ respectively
- DNone of the above
✓
Answer
Correct option: C.
Both heated and cooled above and below $4°C$ respectively
c
(c) Water has maximum density at $4°C$, so if the water is heated above $4°C$ or cooled below $4°C$ density decreases i.e. volume increases.
(c) Water has maximum density at $4°C$, so if the water is heated above $4°C$ or cooled below $4°C$ density decreases i.e. volume increases.
In other words, it expands so it overflows in both the cases.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion, the average time of collision between molecules increases as $V ^q$, where $V$ is the volume of the gas. The value of $q$ is $\left( {\gamma = \frac{{{C_P}}}{{{C_V}}}} \right)$
→A body of mass $1\,kg$ crosses a point $O$ with a velocity $60\,ms^{-1}$. A force of $10\,N$ directed towards $O$ begins to act on it. It will again cross $O$ in ......... $\sec$
→A $n-p-n$ transistor is connected in commonemitter configuration in which collector supply is $8\, V$ and the voltage drop across the load resistance of $800\,\Omega $ connected in the collector circuit is $0.8\, V$. If the current amplication factor $\alpha $ is $25/26$, the collector-emitter voltage $V_{CE}$ and the base current $I_B$ will be
→A transformer is used to light $140\, watt$ $24\, volt$ lamp from $240\, volt$ $AC$ mains; the current in the main cable is $0.7\, amp$. The efficiency of the transformer is......$\%$
→The disc of mass $M$ with uniform surface mass density $\sigma$ is shown in the figure. The centre of mass of the quarter disc (the shaded area) is at the position $\frac{x}{3} \frac{a}{\pi}, \frac{x}{3} \frac{a}{\pi}$ where $x$ is ....... .
→(Round off to the Nearest Integer) $[ a$ is an area as shown in the figure $]$
The ratio of the magnetic field at the centre of a current carrying coil of the radius $a$ and at a distance ‘$a$’ from centre of the coil and perpendicular to the axis of coil is
→Charge $q$ is uniformly spread on a thin ring of radius $R.$ The ring rotates about its axis with a uniform frequency $f\, Hz.$ The magnitude of magnetic induction at the center of the ring is
→A radiowave has maximum electric field intensity of $10^{-4}\ V/m$ on arrival at a receiving antenna. The maximum magnetic flux density of such a wave is
→Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ?
Identify the logic operation performed by the given circuit
