Exams

Who first discovered the every eighth element had properties similar to that of the first?

Which Indian state touches the border of maximum states?

If the average of 31, x, 42, 39, 56, 78, 83 and 91 is 58.5, then what is the value of x?

Which of the following plant group has hidden reproductive organs?

A cuboid shaped wooden block has 6 cm length, 4 cm breadth and 1 cm height.
Two faces measuring 4 cm x 1 cm are coloured in black.
Two faces measuring 6 cm x 1 cm are coloured in red.
Two faces measuring 6 cm x 4 cm are coloured in green.
The block is divided into 6 equal cubes of side 1 cm (from 6 cm side), 4 equal cubes of side 1 cm(from 4 cm side).

How many cubes will have green colour on two sides and rest of the four sides having no colour ?

Generally covalently bonded molecules ______.

I. have high boiling and melting point as compare to ionically bonded molecules

II. poor conductors of electricity

III. have weak intermolecular force

ΔPQR is right angled at Q. If m∠P = 60 deg, then find the value of (cotR + √3/2).

ΔXYZ is right angled at Y. If sinX = 4/5, then what is the value of cosZ ?