Bihar Board Class 10 Science 2026 Question Paper with Solution PDF - Available

Volt (V) is equal to:

• (A) \( \mathrm{C/J} \)
• (B) \( \mathrm{J/C} \)
• (C) \( \mathrm{J/A} \)
• (D) \( \mathrm{A/J} \)

The rate of flow of electric charge is called:

• (A) Electric current
• (B) Electromotive force
• (C) Potential difference
• (D) none of these

Which of the following statements is true?

• (A) joule = volt \(\times\) ampere
• (B) joule = coulomb \(\times\) volt
• (C) joule = \(\dfrac{ampere}{volt}\)
• (D) joule = \(\dfrac{coulomb}{volt}\)

The functional group –CHO is called:

• (A) ether group
• (B) carbonyl group
• (C) aldehydic group
• (D) alcoholic group

Which of the following gases is formed on heating ethanol with concentrated \( \mathrm{H_2SO_4} \)?

• (A) \( \mathrm{CH_4} \)
• (B) \( \mathrm{C_2H_2} \)
• (C) \( \mathrm{C_2H_6} \)
• (D) \( \mathrm{C_2H_4} \)

What are the laws of reflection and refraction?

Differentiate between real and virtual images.

Explain the causes and correction methods (with diagrams) for Hypermetropia (long-sightedness) and Myopia.

Learn the chemical differences between metals and non-metals.