List of practice Questions

If the area of the parallelogram with \(\vec {a}\) and \(\vec {b}\) as two adjacent sides is \(15\, sq.\space units\),then the area of the parallelogram having \(3\vec {a}+2\vec {b}\) and \(\vec{a}+3\vec {b}\) as two adjacent sides in sq. unit is

Sertoli cells are regulated by the pituitary hormone known as-

Amino acid sequence, in protein synthesis is decided by the sequence of-

Areolar connective tissue joins-

The thalloid body of a slime mould (Myxomycetes) is known as -

HIV that causes AIDS, first starts destroying

Which one of the following statements is incorrect?

Earthworms are-

Two particles of equal mass are connected to a rope $AB$ of negligible mass, such that one is at end $A$ and the other dividing the length of the rope in the ratio $ 1:2 $ from $A$. The rope is rotated about end $B$ in a horizontal plane. Ratio of the tensions in the smaller part to the other is (ignore effect of gravity)

The specific charge of a proton is $9.6 \times 10^7 \, C \, kg^{-1}$. The specific charge of an alpha particle will be :

A simple pendulum has a length $l$ and the mass of the bob is $m$. The bob is given a charge $q$ coulomb. The pendulum is suspended between the vertical plates of a charged capacitor. If $E$ is electric field strength between the plates, the time period of pendulum is given by

If $a > b > 0$, then the value of $Tan^{-1} \left(\frac{a}{b}\right)+Tan^{-1}\left(\frac {a+b}{a-b}\right) $

The remainder obtained when $(\lfloor 1)^2 + (\lfloor 2)^2 + (\lfloor 3)^2 + ... + (\lfloor 100)^2$ is divided by $10^2$ is ;

Which of the following is an accumulation and release centre of neurohormones ?

One gene-one enzyme hypothesis was postulated by:

A particle is projected with velocity 100 mis at 30?. Time of flight is

In the removal of silica during smelting, the flux used is

Lead metal is purified by

Which one of the following is not a colloid?

In sugar industry, activated charcoal is used for the decolourisation of cane juice as

Oleum is

$-M$ effect is shown by

Which one of the following does not exist in $\alpha$ and $\beta$ forms?

Two spherical black bodies of radii $r_1$ and $r_2$ at temperatures $T_1$ and $T_2$ respectively, radiate same power. Then $\frac{r_1}{ r_2}$ must be equal to