The planes x=0 and y=0` (A) are parallel (B) are perpendicular to each other (C) interesect in z-axis (D) none of these

The plane x+y=0 (A) is parallel to y-axis (B) is perpendicular to z-axis (C) passes through y-axis (D) none of these

The planes: 2x y + 4z = 5 a n d 5x 2. 5 y + 10 z = 6 are(A) Perpendicular (B) Parallel(C) intersect y-axis (D) passes through (0,0,5/4)

The two lines x=ay+b,z=cy+d and x=a'y+b', z=c'y +d' are pendicular to each other if

Two circles x^2 + y^2 + 2x-4y=0 and x^2 + y^2 - 8y - 4 = 0 (A) touch each other externally (B) intersect each other (C) touch each other internally (D) none of these

Let the equations of a line and plane be (x+3)/2=(y-4)/3=(z+5)/2a n d4x-2y-z=1, respectively, then a. the line is parallel to the plane b. the line is perpendicular to the plane c. the line lies in the plane d. none of these

Let the equations of a line and plane be (x+3)/2=(y-4)/3=(z+5)/2a n d4x-2y-z=1, respectively, then a. the line is parallel to the plane b. the line is perpendicular to the plane c. the line lies in the plane d. none of these

If the planes 2x-y+lamdaz-5=0 an x+4y+2z-7=0 are perpendicular then lamda=

The lines (x-1)/2=(y-2)/3=(z-3)/4 and (x-1)/3=(y-2)/4=(z-3)/5 are (A) parallel to x-axis (B) skew (C) intersecting (D) none of these

The line x=1,y=2 is (A) parallel to x-axis (B) parallel to y-axis (C) parallel to z-axis (D) ies in a plane parallelto xy-plane.

The line x=x_1,y=y_1 is (A) parallel to x-axis (B) parallel to y-axis (C) parallel to z-axis (D) parallel to XOY plane