KIITEE Mock Test - 2 - JEE MCQ

When germanium atoms is doped with equal no. of antimony atoms, we get a/an

At OK temperature, a p-type semiconductor

In a common base amplifier circuit, calculate the change in base current if that in the emitter current is 2 mA and α = 0.98

A compound contains atoms of three elements : A,B and C. If the oxidation number of A is + 2, B is + 5 and that of C is -2, the possible formula of the compound is

In the conversion Br₂ → BrO₃^- the oxidation state of bromine changes from

The basicity of phosphorous acid is

Among the trihalides of nitrogen which one is most basic?

When iron or zinc is added to CuSO₄ solution, copper is precipitated. It is due to

Nitrogen shows different oxidation states in the range

White phosphorus is

The number of P - O bonds and the lone pairs of eletrons present in P₄O₆ molecule, respectively

The angle between the vectors i-j+k and i+2j+k is

A force of magnitude 5 units along the vector 2 î − 2j^{^} + k^{^}  displaces the point of application from (1,2,3) to (5,3,7), then the work done is

is equal to

If sin(x-y) = cos(x+y) = 1/2, the value of x and y lying between 0⁰ and 180⁰, are given by

The equation y² - x² + 2x - 1 = 0 represents

If |a|=3, |b|=4, |c|=5 and a+b+c=0, the angle between a and b is

The centre of a circle passing through the points (0, 0), (1, 0) and touching the circle x² + y² = 9 is

If A(-1,2,3),B(1,1,1) and C(2,-1,3) are points in a plane, the unit vector perpendicular to the plane AB is

If  are non-zero non-collinear vectors and

Two tangents are drawn from the point (-2, -1) to the parabola y² = 4x. If α is the angle between these tangents, then tan α =

The volume of parallelopiped whose edges are -12i+λk, 3i-k, 2i+j-15k respectively is 546, then λ=

If a = i + 2 j + 3k, b = - i + 2 j + k and c = 3 i + j and a + tb is perpendicular to c, the value of t is

If P is any point on the hyperbola [(x - 1)²/9 - (y + 1)²/16] = 1 and S₁, S₂ are its foci, then |s₁ P - S₂ P |