Science Full Practice Exam – Set 2 (Class 10)

What this worksheet covers

This is a 50-question practice worksheet on full practice exam — set 2 for Class 10, written to the pattern of the SOF National Science Olympiad (NSO). It carries 60 marks and is designed to be attempted in 60 minutes, split across four sections — Section 1 — Logical Reasoning, Section 2 — Science, Section 2 — Science (contd.) and Achievers Section. Every question is multiple choice with exactly one correct option, and every one comes with a fully worked solution rather than just an answer key — so a child who gets one wrong can see where the reasoning went astray instead of only learning that it did.

Skills your child practises

• Applied problem-solving on full practice exam — set 2 at Class 10 level
• Working accurately against a time limit, as the real paper demands
• Section 1 — Logical Reasoning questions in the olympiad format
• Section 2 — Science questions in the olympiad format
• Section 2 — Science (contd.) questions in the olympiad format
• Achievers Section questions in the olympiad format
• Reading worked solutions to find the step that went wrong

How to use it

1. 1There are 50 questions in this paper. All questions are compulsory.
2. 2Each question has four options (A), (B), (C) and (D). Exactly one option is correct.
3. 3Questions 1–45 carry 1 mark each. Questions 46–50 (Achievers Section) carry 3 marks each.
4. 4There is no negative marking. Study every diagram and table carefully.
5. 5Rough work may be done in the space at the side of each page.

Sample questions from this worksheet

A preview of what's inside Science Full Practice Exam – Set 2 (Class 10) — the PDF has the full set, and every question comes with a worked solution like these.

1. 1. What comes next in the series? 100, 50, 25, 12.5, ____

   • A5
   • B6.25correct
   • C7.5
   • D10
   Solution: Each term is half the one before it, so the next is 12.5 ÷ 2 = 6.25.

2. 2. On heating, lead nitrate gives off a brown gas. That gas is _______.

   • AHydrogen
   • BOxygen
   • CCarbon dioxide
   • DNitrogen dioxidecorrect
   Solution: Lead nitrate decomposes into lead oxide, oxygen and brown fumes of nitrogen dioxide. The colour of the fumes is the give-away, since oxygen and carbon dioxide are colourless.

3. 3. Two resistors of 3 Ω and 6 Ω are connected in parallel. Their combined resistance is _______.

   • A18 Ω
   • B4.5 Ω
   • C9 Ω
   • D2 Ωcorrect
   Solution: For a parallel pair, {1/R} = {1/3} + {1/6} = {3/6} = {1/2}, so R = 2 Ω — smaller than either resistor, as parallel combinations always are.