List of practice Questions

Newman projections P, Q, R and S are shown below:
Newman projections
 Which one of the following options represents identical molecules?
Choose the correct statement(s) among the following:
A uniform electric field, $\vec{ E }=-400 \sqrt{3} \hat{ y } NC ^{-1}$ is applied in a region. A charged particle of mass $m$ carrying positive charge $q$ is projected in this region with an initial speed of $2 \sqrt{10} \times 10^{6} \,ms ^{-1}$. This particle is aimed to hit a target $T$, which is $5 m$ away from its entry point into the field as shown schematically in the figure Take $\frac{ q }{ m }=10^{10} \,C\,kg ^{-1}$. Then A uniform electric field
Let $a, b$ and $\lambda$ be positive real numbers. Suppose $P$ is an end point of the latus rectum of the parabola $y^{2}=4 \lambda x$, and suppose the ellipse $\frac{x^{2}}{a^{2}}+\frac{y^{2}}{b^{2}}=1$ passes through the point $P$. If the tangents to the parabola and the ellipse at the point $P$ are perpendicular to each other, then the eccentricity of the ellipse is
The energy equivalent of 0.5 g of a substance is:
If for some $c < 0$, the quadratic equation, $2cx^{2}-2\left(2c-1\right)x+3c^{2}=0$ has two distinct real roots, $\frac{1}{a}$ and $\frac{1}{b},$ then the value of the determinant. $\begin{vmatrix}1+a&1&1\\ 1&1+b&1\\ 1&1&1+c\end{vmatrix}$ is :
The angle of elevation of a cloud $C$ from a point $P , 200 m$ above a still lake is $30^{\circ} .$ If the angle of depression of the image of $C$ in the lake from the point $P$ is $60^{\circ}$, then $P C$ (in $m$ ) is equal to :
A small spherical droplet of density $d$ is floating exactly half immersed in a liquid of density $\rho$ and surface tension $T$. The radius of the droplet is (take note that the surface tension applies an upward force on the droplet):
When a solid forms a gel more readily when gently shaken or otherwise sheared than when allowed to form the gel while the material is kept at rest, the phenomenon is known as:
Which one is NOT an opioid receptor?
When an electron with charge 1.60 × 10-19 coulombs is moved through a potential difference of 1 volt, the energy expended or released is called as _____.
Cotrimoxazole is combination of trimethoprim with sulfamethoxazole. Which of the following statement is correct about cotrimoxazole ?
An aldopentose can be converted into aldohexose by:
Antifungal agent 5-fluorocytosine is converted to its active metabolite 5-fluorouracil by one of the following fungal enzyme :
The weakly acidic nature of warfarin is attributed to the presence of:
Ion trapping is an important process in drug distribution with potential therapeutic benefit. It is defined as:
Which of the following is Anti aromatic?
Walden inversion or complete reversal of stereochemistry occurs in one of the following substitution reaction
What is the product of the following reaction?
product of
Globar source in infra red spectrophotometer is____.
What is the approximate chemical shift ranges for protons attached to aldehydic groups?
Five jumbled up sentences, related to a topic, are given below. Four of them can be put together to form a coherent paragraph. Identify the odd one out and key in the number of the sentence as your answer:
The dispersion of course material by shearing in a narrow gap between a static cone and a rapidly rotating cone is caused by:
In solid-solid mixing, large scale continuous type of mixer is
Suppose $a, b$ denote the distinct real roots of the quadratic polynomial $x^{2}+20 x-2020$ and suppose $c, d$ denote the distinct complex roots of the quadratic polynomial $x^{2}-20 x+2020$. Then the value of $a c(a-c)+a d(a-d)+b c(b-c)+b d(b-d)$ is