List of practice Questions

Which of the following are located in tunica media of human blood vessels ?
Which of the following increases area of thoracic cavity during inhalation ?
Which of the following is the effect of a plant hormone which is synthesized by more absence of light ?
How many Calvin cycles are required to produce 10 molecules of glucose ?
What happens when concentration of solutes decreases in guard cells ?
Both photosynthesis and respiration require
Which of the following will increase with the increase in temperature ?
The $C-C$ bond dissociation energy in kcal/mol is
Propan-2-ol + ethanoic acid $ \xrightarrow{{}} $
This metal is extracted from its ore by formation of a cyanide complex
The following is a coordination compound of iron
A telescope has an objective of focal length $100\, cm$ and an eye-piece of focal length $5\, cm$. What is the magnifying power of the telescope when it is in normal adjustment ?
A sealed container with negligible coefficient of volumetric expansion contains helium (a monoatomic gas). When it is heated from 300 K to 600 K, the average KE of helium atoms is
A choke is preferred to a resistance for limiting current in AC circuit because
A convex lens of glass $(\mu=1.5)$ has a focal length of $8\, cm$ when placed in air. What is the focal length of lens when it is immersed in water $\left(\mu=\frac{4}{3}\right) ?$
An object is placed at the focus of a convex mirror. If its focal length is $20\, cm,$ the distance of mirror is
The current through a bulb is increased by $1 \%$. Assuming that the resistance of the filament remains unchanged the power of the bulb will
You are given two resistances $R_{1}$ and $R_{2} .$ By using them singly, in series and in parallel, you can obtain four resistances of $1.5\, \Omega, 2\, \Omega, 6\, \Omega$ and $8\, \Omega$. The values of $R_{1}$ and $R_{2}$ are
A paramagnetic substance is placed in a weak magnetic field and its absolute temperature $T$ is increased. As a result, its magnetisation
A rectangular coil of $100$ turns and size $0.1 \times 0.05\, m$ is placed perpendicular to a magnetic field of $0.1\, T$. The induced emf when the field drops to $0.05\, T$ in $0.05\, s$ is
Two waves are represented by $y_1 = 4 \sin \, 404 \pi t$ and $y_2 = 3 \sin \, 400 \pi t.$ Then
A bimetallic strip consists of brass and iron when it is heated it bends into an arc with brass on the convex and iron on the concave side of the arc. This happens because
A convex lens of glass $ (\mu = 15)$ has a local length of 8 cm when placed in air. What is the strength of lens when it is immersed in water $\bigg(\mu = \frac{4}{3}\bigg) ? $
The equation of a simple harmonic wave is given by $y=5\, \sin \frac{\pi}{2}(100\, t-x)$, where $x$ and $y$ are in meter and time is in second. The period of the wave in second will be
A beam of monochromatic blue light of wavelength $4200\, ?? in air travels in water of refractive index $4/3$. Its wavelength in water will be: