List of practice Questions

The $ BC{{l}_{3}} $ is a planar molecule whereas $ NC{{l}_{3}} $ is pyramidal, because:

The average osmotic pressure of human blood is $7.8$ bar at $37^{\circ}\, C$. What is the concentration of an aqueous $NaCl$ solution that could be used in the blood stream?

Swan neck flask experiment proved:

Ribosomes are made up of

Thomas slag is:

Which of the following Statements, about zero order reaction is not true?

The amount of $ {{\text{H}}_{\text{2}}}\text{S}\text{.} $ required to precipitate $ \text{1}\text{.69 g BaS} $ from $ \text{BaC}{{\text{l}}_{\text{2}}} $ solution is:

Representative elements are

Photosynthetically active radiation (PAR) represents the following range of wave length

Phospholipids are

''The addition of unsymmetrical reagents to unsymmetrical alkenes occurs in such a way that the negative part of the addendum goes to that carbon atom of the double bond which carries lesser number of hydrogen atoms'' is called by :

The molecule of $CO _{2}$ has angle $180^{\circ}$. It can be explained on the basis of :

Which of the following oxides of nitrogen is solid?

Bessemer converter is used for the preparation of:

$Mg$ and $Li$ are similar in their properties due to:

Orthotropus ovule belongs to:

One solid sphere $A$ and another hollow sphere $B$ are of same mass and same outer radii. Their moment of inertia about their diameters are respectively $I_A$ and $I_B$ such that Where $d_A$ and $d_B$ are their densities

One mole of magnesium nitride on the reaction with excess of water gives

On a planet a freely falling body takes $2\,\sec$ when it is dropped from a height of $8\,m$ , the time period of simple pendulum of length $1\,m$ on that planet is:

Number of lone pair(s') in $XeOF_4$ is/are

Middle lamella mainly contains :

Mast cells of connective tissue contain

A body of mass $0.5 \,kg$ is projected under gravity with a speed of $98 \,m/s$ at an angle of $ 60^{\circ} $ with the horizontal. The change in momentum (in magnitude) of the body is

A body of mass $10 \,kg$ is moving with a constant velocity of $10 \,m/s$. When a constant force acts for $4 s$ on it, it moves with a velocity $2 \,m/s$ in the opposite direction. The acceleration produced in it is

A body of mass $M$ is kept on a rough horizontal surface [friction coefficient $=u$). A person is trying to pull the body by applying a horizontal force $F$ but the body is not moving then