List of practice Questions

The magnetic flux linked with a coil, in webers, is given by the equation: $\phi=5 t^{2}+3 t+16$. The induced e.m.f. in the coil in the fourth second will be

The hydrogen atom can give spectral lines in the Lyman, Balmer Paschen series. Which of the following statement is correct?

The hybrid state of positively charged carbon in vinyl carbocation is $ (C{{H}_{2}}=C{{H}^{+}}--) $ :

The force acting on a body of mass 10 kg is $ (2\mathbf{\hat{i}}+\mathbf{\hat{j}}\,-\mathbf{\hat{k}}) $ N. If the body is initially at rest. The velocity at the end of the 20 sec is:

$ N _{2}+3 H _{2} \rightleftharpoons 2 NH _{3} $ The equilibrium constant for the reaction is $K$, then the equilibrium constant or the equilibrium for the reaction given beloow is: $ NH _{3} \rightleftharpoons \frac{1}{2} N _{2}+\frac{3}{2} H _{2} $

The equation of state of some gases can be expressed as $\left(P+\frac{a}{V^{2}}\right)\left(V-b\right)=RT$, where $P$ is the pressure, $V$ is the volume, $T$ is the absolute temperature and $a, b$ and $R$ are constants. The dimensions of $a$ are

The camel?? hump is composed of a tissue, which provides water when oxidised, is called

Sodium phenoxide reacts with $CO_2$ at 400 K and 4.7 atm pressure to give

Riboflavin is:

Plants which can withstand wide range of temperature tolerance are called

Photoperiodism is associated with the formation of:

Pellagra disease is caused by the deficiency of

Mycorrhiza is correctly described as

In the reaction sequence: $ {CaC2 ->[H_2O] A}$$ { ->[{\text{dil}} HgSO_4][HgSO_4] }$$ {B ->[H_2/Ni] C}$, the term ????is

In the reaction: $2P_{2}O_{5}+2HNO_{3}\to P_{4}O_{10}+x,$ the term $x$ is

In mammals, the digestion of starch starts from

In general, the wavelength of microwaves, is

If active mass of a $6\%$ solution of a compound is $2$, its molecular weight will be

Hydrolysis of beryllium carbide produces

How many teeth grow only once in the life of a man?

Gun metal is an alloy of copper and tin with:

Critical temperature can be defined as the temperature

Which of the following sets represents all endodermal structures?

Conjoint, collateral, endarch and open vascular bundles are found in:

Calorimeters are made of which of the following?