List of practice Questions

Cell reaction is spontaneous, when
Which one of the following species acts as both Bronsted acid and base ?
A complex compound in which the oxidation number of a metal is zero is
In the brown ring test, the brown colour of the ring is due to
The monomers of Buna-$S$ rubber are
The number of nodal planes present in $\sigma^* \, s$ antibonding orbitals is
Which metal has a greater tendency to form metal oxide ?
A compound is formed by elements $A$ and $B$. This crystallises in the cubic structure where the $A$ atoms are at the corners of the cube and $B$ atoms are at the body centers. The simplest formula of the compound is
When acetamide is treated with $ Br_2 $ and caustic soda, the product formed is
If $Log_{10}7=0.8451$ then the position of the first significant figure of $7^{-20}$ is
A unit vector perpendicular to both the vectors $\hat {i} +\hat { j} $ and $ \hat {j} +\hat {k}$ is
Hydrogen atom does not emit $X-rays$ because
If $\vec{a} $ and $\vec{b}$ are unit vectors and $|\vec{a} + \vec{b}|=1$ then $|\vec{a} -\vec{b}|$ is equal to
When $AgNO _{3}$ solution is added in excess to $1\, M$ solution of $CoCl _{3} \cdot x NH _{3}$, one mole of $AgCl$ is formed. What is the value of $x$ ?
Two point charges are $3\, m$ apart and their combined charge is $8 \mu C$. The force of repulsion between them is $0.012\, N$. Charges are
A person inside water $n_w = \frac{4}{3} $ sees the 'setting sun' at about
Buffer capacity of a buffer will be maximum when
Dissociation constant of a weak acid is $10^{-5}$. The pH of 0.1 M solution of this acid is
Energy of a charged capacitor is $E$. It is allowed to share its charge with an identical capacitor charged to half its potential. Loss in the energy of the system is
Formation of Eddy currents has desirable effects in 1. Electromagnetic damping, 2. Transformer 3. Inductothermy
If a set $A$ has $n$ elements, then the number of relations on $A$ is
If $\vec{a} = \hat{i} + \lambda \hat{j} + 2 \hat{k}$ and $\vec{b} = \mu \hat{i} + \lambda \hat{j} + 2 \hat{k}$ are orthogonal and if $|\vec{a} | = |\vec{b}|$, then $(\lambda, \mu)$ =
If $\vec{a} , \vec{b} ,\vec{c}$ are unit vectors and $\theta$ is the angle between them, then $| \vec{a} - \vec{b}| = $
$\lim_{x\to0} \frac{\tan x -\sin x}{x^{3}} = $
If $y =\left(1+x\right)\left(1+x^{2}\right) ....\left(1+x^{100}\right),$ then $\frac{dx}{dy} $ at $x = 0$ is