List of practice Questions

A circle with centre at $(2,4)$ is such that the line $x+y+2=0$ cuts a chord of length $6$ . The radius of the circle is

A gaseous mixture containing $He,\, CH _{4}$ and $SO _{2}$ was allowed to effuse through a fine hole then find what molar ratio of gases coming out initially? (Given mixture contains $He,\, CH _{4}$ and $SO _{2}$ in $1: 2: 3$ mole ratio $)$.

A dynamo converts

Which one is least reactive towards nucleophilic substitution reaction?

Which of these is the law of Mendel which is followed universally without exceptions?

The given graph represents $V-I$ characteristic for a semiconductor device.

Which of the following statement is correct?

Aminoacylation of tRNA is essential for

In a galvanic cell, the salt bridge

Two blocks of masses $2\,kg$ and $4\,kg$ are attached by an inextensible light string as shown in the figure. If a force of $120\,N$ pulls the blocks vertically upward, the tension in the string is (take $g = 10\, ms^{-2}$)

The significant result deduced from the Rutherford�s scattering experiment is that

The locus of the centre of the circle, which cuts the circle $x^{2}+y^{2}-20 x+4=0$ orthogonally and touches the line $x=2$, is

The area (in s units) of the triangle formed by the lines $x^{2}-3 x y+y^{2}=0$ and $x+y+1=0$, is

The shortest distance between the skew lines $\bar{r}=(i+2\bar{j}+3\bar{k})+t(i+3\bar{j}+2\bar{k}) $ and $\bar{r}=(4i+5\bar{j}+6\bar{k})+t(2i+3\bar{j}+\bar{k})$ is

If a line $l$ passes through $(k, 2 k),(3 k, 3 k)$ and $(3,1), k \neq 0$, then the distance from the origin to the line $l$ is

The most suitable metal for making electromagnets and transformer cores is

The acid strength of active methylene group in (I) $CH_3COCH_2COOC_2H_5$ (II) $CH_3COCH_2COCH_3$ (III) $C_2H_5OOCCH_2COOC_2H_5$ decreases as

Somaclones are prepared by

Set $ A $ and $ B $ have $ 3 $ and $ 6 $ elements respectively. What can be the minimum number of elements in $ A \cup B $ ?

Sand flies play significant role in spreading Kala-azar because they

Saheli, is an oral contraceptive pill that has very high contraceptive value with little side effects. It is because

Resolving power of reflecting microscope increases with

Plants can be made disease resistant through

Passive immunity is defined as immunity

Palade discovered which of the following cell organelles?

Osmosis is a type of