1
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?
A
$$\left( {n - 1} \right){d^3}n{s^2}$$
B
$$\left( {n - 1} \right){d^5}n{s^1}$$
C
$$\left( {n - 1} \right){d^8}n{s^2}$$
D
$$\left( {n - 1} \right){d^5}n{s^2}$$
2
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey power. The transformation is related to :
A
a change in the partial pressure of oxygen in the air
B
a change in the crystalline structure of tin
C
an interaction with nitrogen of the air at very low temperature
D
an interaction with water vapor contained in the humid air
3
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
If $$u = \sqrt {{a^2}{{\cos }^2}\theta + {b^2}{{\sin }^2}\theta } + \sqrt {{a^2}{{\sin }^2}\theta + {b^2}{{\cos }^2}\theta } $$

then the difference between the maximum and minimum values of $${u^2}$$ is given by :
A
$${\left( {a - b} \right)^2}$$
B
$$2\sqrt {{a^2} + {b^2}} $$
C
$${\left( {a + b} \right)^2}$$
D
$$2\left( {{a^2} + {b^2}} \right)$$
4
AIEEE 2004
MCQ (Single Correct Answer)
+4
-1
Let $$\alpha ,\,\beta $$ be such that $$\pi < \alpha - \beta < 3\pi $$.
If $$sin{\mkern 1mu} \alpha + \sin \beta = - {{21} \over {65}}$$ and $$\cos \alpha + \cos \beta = - {{27} \over {65}}$$ then the value of $$\cos {{\alpha - \beta } \over 2}$$ :
A
$${{ - 6} \over {65}}\,\,$$
B
$${3 \over {\sqrt {130} }}$$
C
$${6 \over {65}}$$
D
$$ - {3 \over {\sqrt {130} }}$$
JEE Main Papers
2023
2021
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12