List of top Questions asked in Andhra Pradesh Polytechnic Common Entrance Test

The most suitable method for concentration of sulphide ore is
The name of complex ion formed when Ag2S is dissolved in KCN solution is
Which of the molecules has highest bond length ('A')?
An element \(\\_{12} M^{24} \) forms ionic compound with another element 'Y. Then the charge on the ion formed by M is 
Match the following :
Ore  Formula
AFe3O4IMagnesite 
BMgCO3IIMagnetite
CZnSIIICinnabar
DHg2SIVZinc Blende
The type of hybrid orbital exist at Be atom in BeCl2 is
The covalent bonds present in nitrogen molecule are
The shape of methane molecule is
A double concave lens of refractive index 1.5 with its two spherical surfaces of radii R1 = 30 cm and R2 = 45 cm is kept in air. Its focal length is
The correct order of electronegativity values of the following elements is
The element with highest electron affinity value among halogens is
The maximum number of electrons that can be accommodated in the shell of an atom is
The non-metal present in IVA (carbon family) is
If the atomic weights of lithium and potassium respectively are 7 and 39, then the atomic weight of sodium as per Dobereiner's law of triads is
The number of elements present in period 4th of long form of periodic table are
A convex lens has a focal length of 10 cm. If u is the object distance, then the image distance is given by
To examine the internal organs of a human body through light, the doctors use
The angle between the paraxial rays and principal axis is
A bird is flying vertically downwards the surface of water of a lake with constant speed. For a fish inside the water exactly below the bird, the bird appears to be
A rectangular tank of depth 4 m is full of water of refractive index \(\frac{4}{3}\). When viewed from the top, the bottom of the tank is seen at a depth of 
The total internal reflection in diamond makes it shine, because the critical angle of diamond is
40 g of water at 60°C is added to. 60g of water at 30°C. The final temperature of their mixture is
Ghee is converted from liquid to solid state during winter season. This process is called
Humidity means
A bar magnet is moved towards a coil (a) slowly, (b) quickly. The induced EMF is