List of practice Questions

Lysosomes are the reservoirs (store houses) of
An electron and proton enter a magnetic Held perpendicularly. Both have same kinetic energy. Which of the following is true?
An atom has electronic configuration $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 3 d^{3} 4 s^{2}$, you will place it in
A reaction occurs spontaneously if
An animal without anus is
$CH _{3} OC _{2} H _{5}$ and $\left( CH _{3}\right)_{3} C - OCH _{3}$ are treated with hydroiodic acid. The fragments after reactions obtained are
One mole of methanol when burnt in $O _{2}$, gives out $723\, kJ\, mol ^{-1}$ heat. If one mole of $O _{2}$ is used, what will be the amount of heat evolved?
The species having tetrahedral shape is
Which of the following does not exist as a Zwitter ion?
The hydrocarbon which does decolourise alkaline $KMnO_{4}$ solution and also does not give any precipitate with ammoniacal silver nitrate is
Plexiglass is a commercial name of
The temperature dependence of rate constant $(k)$ of a chemical reaction is written in terms of Arrhenius equation $k=A e^{-E_{\alpha} / R T}$. Activation energy $\left(E_{a}\right)$ of the reaction can be calculated by ploting
Which one of the following is the true covalent oxide of iodine?
When $H _{2} S$ gas is passed through the $HCl$ containing aqueous solution of $CuCl _{2}, HgCl _{2}$, $BiCl _{3}$ and $CoCl _{2}$, it does not precipitate out
Among the following components of cement which is present in highest amount?
Non-cellular layer that connects inner surface of the epithelial tissue to the connective tissue is
Acetamide and $NaOBr/OH^-$ produce
According to MOT,$ C_2$ molecule has
During the summer season, which hormone concentration is maintained at high level ?
A tuning fork of frequency $340\,Hz $ is vibrated just above the tube of $120\,cm $ height. Water is poured slowly in the tube. What is the minimum height of water necessary for the resonance? (speed of sound in air $ =340\,m/s $ )
A tower stands at the centre of a circular park. $A$ and $B$ are two points on the boundary of the park such that $AB (= a)$ subtends an angle of $60^\circ$ at the foot of the tower, and the angle of elevation of the top of the tower from $A$ or $B$ is $30^??. The height of the tower is
A thermoelectric refrigerator works on
E. coli cells with a mutated $Z$ gene of the lac operon cannot grow in medium containing only lactose as the source of energy because
A stone is dropped from a height $h$ simultaneously, another stone is thrown up from the ground which reaches a height $4h$ . The two stones cross each other after time
A solid sphere is rotating about a diameter at an angular velocity $ \omega . $ If it coots so that its radius reduces to $ \frac{1}{n} $ of its original value, its angular velocity becomes