he activation energies of two reactions are  and. If the temperature of the reacting systems is increased from T₁ to T₂ predict which of the following alternatives is correct? where, k; and k; are rate constants at higher temperature

The angle between the line 2x + y + 1 =0 and x + ky + 5 = 0 is 90° then k = _______

For such questions, we should know the properties of perpendicular lines. We should know how to find the slopes too.

The angle between the line x + y = 1 and x – y = 2 is

The angle between 2x + 3y – 7 = 0 and x + y – 8 = 0 is

The angle between ax + by + c = 0 and (a + b) x – (a – b) y = 0 is

If a line perpendicular to 2x - 3y + 7 = 0 forms a triangle with the coordinate axes whose area is 3 sq. units, then the equation of the line (s) is

For all value of a and b the line ( a + 2b) x + (a - b) y + (a + 5b) = 0 passes through the point

 

Equation of the line making equal intercepts on the axes and passing through the point (2, 4) is

The equation of the line passing through (3, –4) and perpendicular to the line joining (–2, 6) and (5, 9) is

A line make zero intercepts on x – axis and y – axis and it is perpendicular to the line 3x +4y+ 6 = 0 then its equation is

As shown in the diagram, points are either the Then the number of groups of four points

on the same plane is.

Which of the following belongs to, e.g. (double grade) orbitals?

Reduce  into lowest from

Find the area of the triangle with base 30 cm and height 15cm.

The eccentricity of an ellipse whose centre is at the origin is If one of its directrices is then the equation of the normal to it at is

Find the mean absolute deviation of the given numbers: 6,10,3,3,5,8,6,2