1
JEE Main 2021 (Online) 25th July Evening Shift
Numerical
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A system does 200 J of work and at the same time absorbs 150 J of heat. The magnitude of the change in internal energy is ____________ J. (Nearest integer)
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2
JEE Main 2021 (Online) 25th July Evening Shift
Numerical
+4
-1
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An accelerated electron has a speed of 5 $$\times$$ 106 ms$$-$$1 with an uncertainty of 0.02%. The uncertainty in finding its location while in motion is x $$\times$$ 10$$-$$9 m. The value of x is ____________. (Nearest integer)

[Use mass of electron = 9.1 $$\times$$ 10$$-$$31 kg, h =6.63 $$\times$$ 10$$-$$34 Js, $$\pi$$ = 3.14]
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3
JEE Main 2021 (Online) 25th July Evening Shift
Numerical
+4
-1
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Number of electrons present in 4f orbital of Ho3+ ion is ____________. (Given Atomic No. of Ho = 67)
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4
JEE Main 2021 (Online) 25th July Evening Shift
Numerical
+4
-1
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JEE Main 2021 (Online) 25th July Evening Shift Chemistry - Hydrocarbons Question 76 English
Consider the above chemical reaction. The total number of stereoisomers possible for Product 'P' is _____________.
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