List of practice Questions

$CH _{3} CH _{2} C \equiv CH {->[{ R }]} $ butanone $-2 . R$ is
Which has minimum solubility?
$H _{2} O$ is liquid while $H _{2} S$ is a gas due to
Phenol reacts with chloroform in presence of:
Disease caused by deficiency of protein in children is:
Dual nature of particle was given by:
Bile helps in the digestion of fat through:
Which of the following molecules has trigonal planar geometry?
A police jeep is chasing with velocity of $45\, km/h$ a thief in another jeep moving with velocity $153\,km/h$. Police fires a bullet with muzzle velocity of $180\,m/s$ The velocity it will strike the car of the thief is:
A plane glass slab is kept over various colour letters, the letter which appears least raised is:
The length, breadth and thickness of a block are given by $l=12\, cm , b=6 \,cm$ and $t=2.45 \,cm .$ The volume of the block according to the idea of significant figures should be
Five particles of mass $2\,kg$ are attached to the rim of a circular disc of radius $0.1\,m$ and negligible mass. Moment of inertia of the system about the axis passing through the centre of the disc and perpendicular to its plane is:
The radius of the convex surface of planoconvex lens is $20\,cm$ and the refractive index of the material of the lens is $1.5$. The focal length is:
A can filled with water is revolved in a vertical circle of radius $4\,m$ and the water does not fall down. What must be the maximum period of revolution?
A coil having $N$ turns carry a current as shown in the figure. The magnetic field intensity at point $P$ is:
Which part of human brain controls the breathing movements ?
Which mirror is to be used to obtain a parallel beam of light from a small lamp ?
The value of $Cos (270^\circ +\theta )Cos (90^\circ - \theta ) - Sin (270^\circ - \theta )Cos \theta$ is
An emulsifier is a substance which
Which of the following groups of algae do not have eukaryotic organization ?
If 'muscle times speed equals power' what is the ratio of the $SI$ unit and the $CGS$ unit of muscle?
An object travels north with a velocity of $ 10\,m{{s}^{-1}} $ and then speeds up to a velocity of $ 25\,m{{s}^{-1}} $ in 5 s. The acceleration of the object in these 5 s is:
A container is filled with water ($\mu$ = 1.33) up to a height of 33.25 cm. A concave mirror is placed 15 cm above the water level and the image of an object placed at the bottom is formed 25 cm below the water level. The focal length of the mirror is
${4K2Cr2O7 ->[Heat] 4K2CrO4 + 3O2 + X. }$ In the above reaction X is:
Aluminium reacts with caustic soda to form: