After replacement, bulb glows in B as NaOH solution contains Na⁺ and OH⁻ ions, which are responsible for electrical conductivity.

(i)Rainbow is caused by scattering of sunlight by tiny water droplets, present in the atmosphere. (ii) A rainbow is always formed in a direction opposite to that of the Sun. (iii) The water droplets refract and scatter the incident sunlight, ...

Class X Science MCQ Extra Questions Answers Class 10 Science Terminal Exams MCQ Solutions Class 10th Science Session 2022-23 10th Science Terminal Exam Based MCQ Extra Questions

As the student wants to show that carbon dioxide is essential for photosynthesis, he sealed both the bell jars with Vaseline (- petroleum product) and placed KOH in one bell jar as KOH absorbs CO₂ gas present in the bell ...

(i) Pb + CuCl₂ → PbCI₂ + Cu (ii) Na₂SO₄ + BaCl₂ → BaSO₄ + 2NACI (iii) C+ O₂ → CO₂ (iv) CH₄ + 20₂ → CO₂ + 2H₂ O

(I) Displaces silver from the solution (II) Forms a blue coloured complex with AgNO₃ (III) Is oxidized to Cu2⁺ (IV) Is reduced to Cu2⁺

When white light enters a Prism, different colours undergo refraction and as they enter a denser medium, they bend towards the normal at different angles.

The colours in ascending order of wavelength are: Violet, Indigo, Blue, after that Green, Yellow, Orange and lastly, Red. The wavelength of violet colour is the least (First stand in wavelength) and that of red (last stand in wave length) ...

Class 10 Science Terminal Exams MCQ Solutions Class X Science MCQ Extra Questions Answers 10th Science Terminal Exam Based MCQ Extra Questions Class 10th Science Session 2022-23

Class 10th Science Session 2022-23 Class 10 Science Terminal Exams MCQ Solutions Class X Science MCQ Extra Questions Answers 10th Science Terminal Exam Based MCQ Extra Questions