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WB JEE 2019
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155
Duration
180 mins
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WB JEE- Previous Year Papers
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2019 · Chemistry · Physical Chemistry · Radioactivity And Nuclear Chemistry
WB JEE 2019
The half-life period of \({}_{53}{I^{125}}\) is 60 days. The radioactivity after 180 days will be
2019 · Physics · Mechanics · Units And Measurements
WB JEE 2019
The density of the material of a cube can be estimated by measuring its mass and the length of one of its sides. If the maximum error in the measurement of mass and length are 0.3% and 0.2% respectively, the maximum error in the estimation of the density of the cube is approximately
2019 · Mathematics · Algebra · Matrices And Determinants
WB JEE 2019
Let \(A = \left[ {\matrix{
3 & 0 & 3 \cr
0 & 3 & 0 \cr
3 & 0 & 3 \cr
} } \right]\). Then, the roots of the equation det \((A - \lambda {I_3})\) = 0 (where I3 is the identity matrix of order 3) are
2019 · Chemistry · Physical Chemistry · Thermodynamics
WB JEE 2019
At constant pressure, the heat of formation of a compound is not dependent on temperature, when
2019 · Physics · Mechanics · Properties Of Matter
WB JEE 2019
A compressive force is applied to a uniform rod of rectangular cross-section so that its length decreases by 1%. If the Poisson's ratio for the material of the rod be 0.2, which of the following statements is correct?
"The volume approximately ................."
"The volume approximately ................."
2019 · Mathematics · Algebra · Quadratic Equations
WB JEE 2019
Let a, b, c be real numbers such that a + b + c < 0 and the quadratic equation ax2 + bx + c = 0 has imaginary roots. Then,