List of practice Questions

The phase difference between two waves, represented by $y_1=10^{-6} \sin[100t +(x/50)+0.5]\,m$ $y_2=10^{-6} \cos[100t +(x/50)]\,m$ where $x$ is expressed in metres and $t$ is expressed in seconds, is approximately.
The work done during the expansion of a gas from a volume of $4\, dm^3$ to $6 \,dm^3$ against a constant external pressure of $3$ atm is :-
The most abundant element present in the plant is
The molecular formula of diphenyl methane How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom?
Which one of the following precedes reformation of nuclear envelope during M-phase of cell cycle ?
Movement among cells against concentration gradient is called :
Recently Govt. of India has allowed mixing of alcohol in petrol. What is the amount of alcohol permitted for mixing in petrol
Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem
The maximum growth rate occurs in
Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere
Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has been inhaling polluted air containing unusually high content of

A nucleus is represented by the symbol \(_{Z}^{A}\textrm{X}\) has

If |A×B| = 3 A.B then the value of |A + B| is
Reaction of $HBr$ with propene in the presence of peroxide gives
Lack of independent assortment of two genes-$A$ and $B$ in fruit fly-Drosophila is due to
Restriction endonucleases
DNA fingerprinting refer to
A coil of 40 henry inductance is connected in series with a resistance of 8 ohms and the combination is joined to the terminals of a 2-volt battery. The time constant of the circuit is
One mole of an ideal gas at an initial temperature of T K does 6 R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 35 , the final temperature of gas will be
In which one of the following enzymes, is copper necessarily associated as an activator
Which of the following statements is not true for retroviruses
Mast cells of connective tissue contain

When CO2 concentration in blood increases, breathing becomes

Diversification in plant life appeared
Variable oxidation state and degenerated orbital shows: