List of practice Questions

The lines $x + y = | a |$ and $ax - y = 1$ intersect each other in the first quadrant. Then the set of all possible values of $a$ is the interval :
A man saves Rs. $200$ in each of the first three months of his service. In each of the subsequent months his saving increases by Rs. $40$ more than the saving of immediately previous month. His total saving from the start of service will be Rs. $11040$ after
The coefficient of $x^7$ in the expansion of $(1- x - x^2 + x^3 )^6$ is
Aluminium oxide is not reduced by chemical reactions since
A gas absorbs a photon of $355 nm$ and emits at two wavelengths. If one of the emissions is at $680 nm$, the other is at:
A force F acting on a body depends on the distance $x$ as $F \propto x^{-1/3}$. The power delivered by $F$ will depend on distance $x$ as
A far sighted person has his near point 50 cm, find the power of lens he should use to see at 25 cm, clearly.
The organism which can tolerate and thrive in a wide temperature range are known as
Pyruvate can be converted to acetyl coA by the action of
Traizines are widely used as
In phaeophyceae, which of the following pigments is absent?
Isoenzymes can be best defined as
Entamoeba differs from Amoeba in not having
Which of the following belongs to phylum coelenterata?
Iodine is extracted from which of the following algae ?
The endosperm of gymnosperms is
In Cycas, the fertilization is
A dorsiventral leaf, when cut into section, its vascular bundles reveal presence of pholem on
Which of the following is a rootless plant?
The method of directly injecting a sperm into ovum in assisted reproductive technology is called
What will be the effect of using white light in place of sodium light in the Young's double slit experiment?
For which of the following voltages will the wavelengh of emitted $X$-rays will be minimum?
A wave is expressed by the equation $ y= a\,sin [\frac{\pi x}{2a} - \frac{\pi t}{2}]$ where $x$ and $y$ are in $m$ and $t$ in $s$. The distance travelled by the wave in $3 \,s$ is
According to Bohr's model, relation between the radius of an orbit and principal quantum number is
A cylindrical tube, open at both ends, has a fundamental frequency $f$ in air. The tube is dipped vertically in water so that half of it is in water. The fundamental frequency of the air column is