Chemistry · 2024
JEE Main · 9 April 2024, Shift 2 · Q61
The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency ' A ' × 10^12 hertz and that…
The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency ' A ' $\displaystyle \times 10^{12}$ hertz and that has a radiant intensity in that direction of $\displaystyle \frac{1}{\text{'B'}}$ watt per steradian.
' A ' and ' B ' are respectively
Official answer
From NTA’s final answer key for this paper.
(3)
$\displaystyle 540$ and $\displaystyle 683$
More from Some Basic Concepts of Chemistry
- 2.8 × 10^-3 mol of CO_2 is left after removing 10^21 molecules from its ' x ' mg sample. The mass of CO_2 taken initially is Given: N_A=6.02 × 10^23…2025
- For the given reaction; CaCO_3+2 HCl → CaCl_2+H_2 O+CO_2 If 90 g CaCO_3 is added to 300 mL of HCl which contains 38.55 % HCl by mass and has density…2026
- 10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a volumetric flask of…2025
- In the Claisen-Schmidt reaction to prepare 351 g of dibenzalacetone using 87 g of acetone, the amount of benzaldehyde required is ____ g. (Nearest…2024
- From 6.55 g of aniline, the maximum amount of acetanilide that can be prepared will be ____ × 10^-1 g.2024
- x mg of pure HCl was used to make an aqueous solution. 25.0 mL of 0.1 M Ba(OH)_2 solution is used when the HCl solution was titrated against it. The…2026
- Fortification of food with iron is done using FeSO_4.7 H_2 O. The mass in grams of the FeSO_4. 7 H_2 O required to achieve 12 ppm of iron in 150 kg…2025
- Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is ____ \%. (nearest integer) (Given molar mass in g mol^-1 C:…2025
JEE Main 2024 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.